26 Replies Latest reply: Apr 26, 2013 5:45 AM by AXISDATANETWORK RSS

Oracle Database 11.2 slow performance on NetApp FAS3240

AXISDATANETWORK
Currently Being Moderated
Hi all,
  
I have opened this discussion to request your feedback about a performance issue that we have observer on our production environment. I will try to give to you as must information that I know, sorry if the question is too long.
 
We have bought a new (2) NetApp FAS3240 to replace out old EMC AX4-5. On one of the controller (1) we have created an aggregate with 2 raid groups of 12 disk (2,5" 10k rpm) in each diskgroup with RAID-DP. On the other controller (2) we have created an aggregate with 2 raid groups of 20 disk (2,5" 10k rpm). Both controller are running NetApp Release 8.0.2P6 7-Mode. Servers access to the filer through FC protocol.
  
On the aggregate 1 of the "Controller 1"  we have create several volume an inside of each volume we have created several LUNs following the NetApp best practices. Nowadays this aggregate is dedicated to run a Oracle RAC database 11.2.0.2 with two nodes, one instance per node. Oracle datafiles are on a volume 1.1 Tbytes with 10 LUNs of 100Gbytes each one. Volumen created without snapshot and thin provision.
  
After the migration to the new storage, at database level, we have observe an increase in the average latency response time. The following example correspond with our load per week with both storages comparing the week before and after migration:
  
EMC:
                                                             Avg
                                        %Time Total Wait    wait    Waits   % DB
Event                             Waits -outs   Time (s)    (ms)     /txn   time
-------------------------- ------------ ----- ---------- ------- -------- ------
db file sequential read      55,997,027     0    460,973      8      4.9   18.5
db file scattered read       10,712,448     0    107,856      10      0.9    4.3
NetApp
                                                             Avg
                                        %Time Total Wait    wait    Waits   % DB
Event                             Waits -outs   Time (s)    (ms)     /txn   time
-------------------------- ------------ ----- ---------- ------- -------- ------
db file sequential read      54,807,814     0    662,336      12      4.5   17.0
db file scattered read       11,615,111     0    218,657      19      1.0    5.6
First approach to try to improve the performance was to enable the Read Reallocate function for the volumen used by Oracle datafiles because in two weeks the threshold reach the value 4. With this change we have the threshold lower than 3.
With the information gathered with NetApp Management Console we have identified that we have latencies bigger than 100 ms on some period of time as you can see on the attached graph
vol_racprod_latency_12022013.jpg
Oracle Export Data Pump utility appear to be the root cause of this behavior when it execute a export of our biggest tables (30 Gbytes) using direct path way using two parallel process. This process export his biggest tables between 1:30-2:00, if we remove this process we got an improvement on the latencies, as you can see:
vol_racprod_latency_22022013.JPG
We have detected the same performance issue when executing an index rebuild on our biggest tables with a degree of 4 or moving this segment from one tablespace to another.
On the aggregate 1 of the "Controller 1"  we have create a volumen of 1.1 Tbytes with 10 LUNs of 100Gbytes each one to create a Oracle ASM Cluster file system (ACFS). On this volume we write the expdp file output. We have a slow performance also in this volume as you can see on the graphs:
Latency:
Latencia_Filesystem_14032012.JPG

Throughput

throughput_filesystem_14032012.JPG

On "controller 2" on the same a aggregate we have created several volume for deploy a SQL Server 2012 Enterprise Edition used by our BI team

Latency

latency_temp_22032013.JPG

 

Throughput

throughput_temp_220302013.JPG

My feeling is that the storage has a poor performance when Oracle execute multiblock IO operations, Oracle could execute bigger (in size) multiblock IO operations than SQL Server because of that the issue only happen with Oracle.

 

Please, Any one running Oracle with a similar environment has detected any similar issue or could give me any feedback about how can I solve this issue.

 

Thank you in advance, regards

  • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
    AXISDATANETWORK
    Currently Being Moderated

    Hi,

     

    Please, any one has any idea or have a similar scenario.

     

    Thank you in advance, regards.

    • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
      thomas.glodde
      Currently Being Moderated

      Hi,

      have you checked for partition misalignment?

      priv set diag

      lun show -v

           /vol/w2k8_server/mproot.lun      5.0g (5371107840)    (r/w, online, mapped)

                      Comment: " "

                      Serial#: XXXXXXXXXXX

                      Share: none

                      Space Reservation: disabled

                      Multiprotocol Type: windows_gpt

                      Maps: w2k8-server=0

                      Occupied Size:    1.3g (1352630272)

                      Creation Time: Mon Oct  6 17:38:38 CEST 2008

                      Alignment: indeterminate

                      Cluster Shared Volume Information: 0x0

                      Space_alloc: disabled

       

      See what "Alignment" row displays.

      • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
        AXISDATANETWORK
        Currently Being Moderated

        Hi Thomas,

         

        Thank you about your feedback.

         

        Yes, we have checked for partition misaligment, all the luns show "Alignment: aligned" for the volume created to storage the database data, the output of one of the LUNs is:

         

        LUNs from one controller:

         

                /vol/vol_racprod_data/LUN_racprod_A_data0    100g (107374182400)  (r/w, online, mapped)

                        Serial#: GoeKc4nt27zN

                        Share: none

                        Space Reservation: enabled

                        Multiprotocol Type: linux

                        Maps: 36=10 38=10

                        Occupied Size:   97.7g (104879898624)

                        Creation Time: Wed Nov 28 17:19:30 CET 2012

                        Alignment: aligned

                        Cluster Shared Volume Information: 0x0

         

        LUNs from the other controller:

                /vol/vol_racprod_B_filesystem/LUN_racprod_B_filesystem0    100g (107374182400)  (r/w, online, mapped)

                        Serial#: GoeKcZpe6WXH

                        Share: none

                        Space Reservation: enabled

                        Multiprotocol Type: linux

                        Maps: 38=8 36=9

                        Occupied Size:   99.9g (107282169856)

                        Creation Time: Tue Feb 26 15:39:55 CET 2013

                        Alignment: aligned

                        Cluster Shared Volume Information: 0x0

         

        We also have checked the reallocate status for each volume and is under threshold (4).

         

        Any other suggestion are welcome.

         

        Regards 

        • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
          thomas.glodde
          Currently Being Moderated

          during times of performance problems, please be so kind to run a "sysstat -x 1" for about a minute as well as an "priv set diag; sysstat -M 1;priv set" for about a minute and post that output.

          Cheers,

          Thomas

          • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
            AXISDATANETWORK
            Currently Being Moderated

            Hi Thomas,

             

            I have executed the following test: Export datapump of two tables with size 42,3 gbytes and the other one 35,1 Gbytes with the options: PARALLEL=2 EXCLUDE=GRANT,INDEX,CONSTRAINT,TRIGGER

             

            NetApp Management Console reports the following latency peak:

             

            Controller 1 (source data/read operations)

            EXPDP_Latencies.JPG

            Controller 2 (destination data/write operations)

            EXPD2_Latencies.jpg

             

            Output for the requested commands (executed at 16:42)

             

            - Controller 1 (source data/read operations)

             

            STOMTSZRH020> sysstat -x 1

            CPU    NFS   CIFS   HTTP   Total     Net   kB/s    Disk   kB/s    Tape   kB/s  Cache  Cache    CP  CP  Disk   OTHER    FCP  iSCSI     FCP   kB/s   iSCSI   kB/s

                                                   in    out    read  write    read  write    age    hit  time  ty  util                            in    out      in    out

            30%      0      0      0     967       1      1  134160 111764       0      0     2s    69%  100%  :f  100%       0    963      0    4852 103950       0      0

            31%      0      0      0     925       0      1  135556  50624       0      0     3s    75%  100%  :f  100%       0    919      0    5810 115403       0      0

            28%      0      0      0     876       1      0  147504  39784       0      0     3s    72%   66%  :   100%       3    867      0     500 116145       0      0

            32%      0      0      0     948       0      1  191312     24       0      0     2s    65%    0%  -   100%       0    940      0    3107 150673       0      0

            26%      0      0      0     509       1      0  123888      0       0      0     2s    70%    0%  -   100%       0    499      0     358 100698       0      0

            33%      0      0      0     695       0      1  189083      0       0      0     2s    60%    0%  -   100%       0    673      0     778 129569       0      0

            33%      0      0      0    1051       1      0  168644     24       0      0     1s    69%    0%  -   100%       0   1015      0    3611 145716       0      0

            32%      0      0      0     559       1      9  176932      8       0      0     2s    63%    0%  -   100%      10    543      0    4697 135126       0      0

            57%      0      0      0     566       3     34  169447  66953       0      0     2s    87%   41%  Hn  100%       0    556      0    4331 132790       0      0

            50%      0      0      0    1405       1     53  143070 190196       0      0     2s    89%  100%  :n  100%       0   1377      0   11274 105535       0      0

            37%      0      0      0     710       1      7  173932  31872       0      0     3s    73%  100%  :s  100%       0    708      0    5359 143653       0      0

            36%      0      0      0    1071       0      1  185860  16416       0      0     3s    63%  100%  :f  100%       0   1063      0    1840 148832       0      0

            34%      0      0      0    1655       1      0  186844   3616       0      0     2s    60%  100%  :f  100%       3   1650      0    8683 142281       0      0

            31%      0      0      0     973       0      1  166516  12264       0      0     2s    66%  100%  :f  100%       0    963      0     835 136860       0      0

            32%      0      0      0     921       1      0  172204 106364       0      0     3     54%  100%  :f  100%       4    807      0     636 128427       0      0

            33%      0      0      0    1793       0      1  144440  75820       0      0     2s    69%  100%  :f  100%       0   1791      0   14816 128297       0      0

            26%      0      0      0     443       1      0  121692 115680       0      0     2s    69%  100%  :f   93%       0    429      0     512 101560       0      0

            23%      0      0      0     653       1      1  108144  49520       0      0     2s    81%   89%  :    87%       3    648      0    1312  94758       0      0

            16%      0      0      0     742       0      1   80904     24       0      0     3s    75%    0%  -    47%       0    742      0    4872  73284       0      0

            CPU    NFS   CIFS   HTTP   Total     Net   kB/s    Disk   kB/s    Tape   kB/s  Cache  Cache    CP  CP  Disk   OTHER    FCP  iSCSI     FCP   kB/s   iSCSI   kB/s

                                                   in    out    read  write    read  write    age    hit  time  ty  util                            in    out      in    out

              4%      0      0      0     384       1      1    3672      0       0      0     3s    55%    0%  -    18%       0    370      0    5379   2538       0      0

            10%      0      0      0    1104       0      2    5172      0       0      0     3s    84%    0%  -    19%       0   1092      0   12569   2825       0      0

              8%      0      0      0     917       2      2    6496     24       0      0     3s    70%    0%  -    29%       0    915      0    7444   5332       0      0

            10%      0      0      0     962       0      1    2100      8       0      0     3s    85%    0%  -    15%       3    953      0   13224   2193       0      0

              7%      0      0      0    1697       1      0    3492      0       0      0     3s    79%    0%  -    23%       0   1693      0   16085   3412       0      0

            31%      0      0      0    1937       0      1  148812     24       0      0     7s    70%    0%  -    97%       0   1933      0   11834 105887       0      0

            33%      0      0      0    1570       8     20  137416      0       0      0     6s    72%    0%  -    96%       0   1566      0    7351 105443       0      0

            34%      0      0      0    1365       1     42  164824      0       0      0     1s    68%    0%  -   100%       0   1343      0    8781 147850       0      0

            37%      0      0      0     961       2     31  175972   7306       0      0     1s    78%   11%  Tn  100%       3    912      0    4710 141802       0      0

            53%      0      0      0     503       0      1  103720 131160       0      0     1s    90%  100%  :s  100%       0    501      0    4775  68666       0      0

            37%      0      0      0     751       3      4  181288  20428       0      0     3     65%  100%  :s  100%       0    739      0    2617 142585       0      0

            40%      0      0      0    1432       0      1  160172  83584       0      0     1s    75%  100%  :f  100%       0   1418      0    9119 121772       0      0

            35%      0      0      0     658       2      2  148312  64856       0      0     1s    75%  100%  :f  100%       0    642      0    1124 120170       0      0

            33%      0      0      0     941       1      2  170488  43612       0      0     1s    73%  100%  :f  100%       3    928      0     842 138561       0      0

            36%      0      0      0    1660       1      0  196884  39444       0      0     1s    71%  100%  :f  100%       0   1658      0   12694 163402       0      0

            35%      0      0      0    1010       5     12  182368  87712       0      0     1s    66%  100%  :f  100%       0   1000      0    1784 145221       0      0

            33%      0      0      0     889       1      2  149584  85980       0      0     1s    70%  100%  :f  100%       0    877      0    1101 123594       0      0

            34%      0      0      0    1701       0      1  165204   3180       0      0     1s    66%   39%  :   100%       0   1649      0   10153 122686       0      0

            34%      0      0      0    1234       1      0  169308      8       0      0     0s    69%    0%  -   100%       3   1183      0    2156 136115       0      0

            36%      0      0      0    1078       0      1  204584      0       0      0     1s    69%    0%  -   100%       0   1064      0    4999 178453       0      0

             

            STOMTSZRH020*> sysstat -M 1

            ANY1+ ANY2+ ANY3+ ANY4+  AVG CPU0 CPU1 CPU2 CPU3 Network Protocol Cluster Storage Raid Target Kahuna WAFL_Ex(Kahu) WAFL_XClean SM_Exempt Cifs Exempt Intr Host  Ops/s   CP

              52%   23%    7%    2%  21%  16%  22%  27%  21%      1%       0%      0%     12%  16%     4%    12%     25%( 19%)          1%        0%   0%    13%   2%   1%    383 100%

              54%   26%    9%    2%  23%  19%  25%  29%  20%      1%       0%      0%     12%  16%     5%     8%     33%( 24%)          2%        0%   0%    14%   2%   1%    793 100%

              59%   29%   11%    3%  26%  22%  26%  33%  24%      1%       0%      0%     12%  18%     4%    13%     30%( 22%)          9%        0%   0%    16%   2%   1%    470 100%

              52%   25%    9%    2%  23%  18%  25%  29%  19%      1%       0%      0%     11%  17%     4%     6%     35%( 25%)          0%        0%   0%    14%   2%   2%    567 100%

              51%   25%    8%    2%  22%  18%  24%  28%  18%      1%       0%      0%     12%  17%     5%     7%     30%( 22%)          0%        0%   0%    14%   2%   1%    652 100%

              54%   27%    9%    2%  24%  19%  24%  32%  19%      1%       0%      0%     11%  19%     4%     7%     31%( 23%)          0%        0%   0%    18%   2%   1%    590 100%

              41%   19%    6%    1%  17%  13%  18%  22%  15%      1%       0%      0%      9%  13%     3%     7%     22%( 16%)          0%        0%   0%    12%   2%   1%    325 100%

              24%    8%    2%    0%   9%   8%   8%  12%   9%      1%       0%      0%      3%   7%     2%     7%      6%(  5%)          0%        0%   0%     8%   2%   1%    778 100%

              14%    5%    1%    0%   5%   4%   5%   7%   5%      1%       0%      0%      3%   4%     1%     4%      2%(  2%)          0%        0%   0%     5%   1%   1%    234  85%

              14%    4%    1%    0%   6%   5%   7%   6%   4%      1%       0%      0%      3%   3%     1%     2%      7%(  5%)          0%        0%   0%     2%   1%   2%    298   0%

              10%    2%    1%    0%   4%   3%   4%   3%   4%      1%       0%      0%      3%   1%     1%     3%      3%(  3%)          0%        0%   0%     1%   1%   1%    404   0%

              13%    4%    1%    0%   5%   5%   5%   3%   7%      1%       0%      0%      2%   1%     2%     5%      6%(  4%)          0%        0%   0%     0%   2%   1%    595   0%

              50%   23%    8%    2%  21%  17%  22%  27%  19%      1%       0%      0%     11%  14%     6%     7%     33%( 25%)          0%        0%   0%    11%   2%   1%   1401   0%

              48%   22%    8%    2%  21%  18%  22%  24%  18%      1%       0%      0%     10%  12%     7%     6%     34%( 24%)          0%        0%   0%    10%   2%   1%   1755   0%

              50%   22%    7%    2%  21%  18%  21%  26%  17%      1%       0%      0%     11%  13%     6%     6%     32%( 24%)          0%        0%   0%    10%   2%   1%   1035   0%

              44%   18%    5%    1%  18%  15%  19%  21%  15%      1%       0%      0%      9%  12%     4%     6%     27%( 20%)          0%        0%   0%    10%   2%   1%    477   0%

              47%   22%    7%    2%  20%  17%  21%  25%  18%      1%       0%      0%     10%  13%     4%     6%     33%( 24%)          0%        0%   0%    11%   2%   1%    463   0%

              38%   15%    5%    1%  15%  13%  15%  17%  15%      1%       0%      0%      7%   8%     4%     7%     23%( 17%)          0%        0%   0%     7%   2%   1%   1076   0%

              22%    4%    1%    0%   7%   5%   5%   5%  13%      1%       0%      0%      3%   3%     1%    12%      2%(  2%)          4%        0%   0%     1%   1%   1%    431  12%

            ANY1+ ANY2+ ANY3+ ANY4+  AVG CPU0 CPU1 CPU2 CPU3 Network Protocol Cluster Storage Raid Target Kahuna WAFL_Ex(Kahu) WAFL_XClean SM_Exempt Cifs Exempt Intr Host  Ops/s   CP

              52%   18%    6%    2%  20%  12%  16%  21%  31%      1%       0%      0%      7%  13%     1%    28%      6%(  4%)         11%        0%   0%    11%   1%   1%    588 100%

              21%    6%    2%    0%   8%   6%   7%   8%  11%      1%       0%      0%      3%   4%     2%     9%      5%(  4%)          0%        0%   0%     5%   1%   1%    927 100%

              20%    6%    2%    1%   8%   7%   8%  10%   7%      1%       0%      0%      4%   5%     3%     4%      7%(  5%)          0%        0%   0%     5%   1%   1%   1094 100%

              37%   18%    8%    4%  17%  15%  18%  21%  16%      1%       0%      0%      7%  10%     6%     7%     27%( 16%)          0%        0%   0%     9%   2%   1%   2880 100%

              54%   27%   10%    3%  24%  19%  26%  31%  21%      1%       0%      0%     12%  16%     7%     7%     37%( 26%)          0%        0%   0%    13%   2%   1%   1475 100%

              53%   25%    9%    2%  23%  17%  25%  30%  20%      1%       0%      0%     12%  17%     7%     8%     31%( 23%)          0%        0%   0%    13%   2%   1%    948 100%

              55%   27%    9%    2%  24%  18%  27%  31%  19%      1%       0%      0%     12%  17%     7%     7%     34%( 25%)          0%        0%   0%    15%   2%   1%    842 100%

              58%   31%   13%    5%  27%  21%  29%  34%  25%      1%       0%      0%     12%  18%     9%     8%     43%( 28%)          0%        0%   0%    15%   2%   1%   2330 100%

              51%   24%    9%    2%  22%  17%  24%  27%  20%      1%       0%      0%     11%  14%     8%     8%     34%( 25%)          0%        0%   0%    11%   2%   1%   1802  72%

              52%   23%    7%    2%  22%  18%  23%  28%  18%      1%       0%      0%     11%  14%     5%     6%     33%( 25%)          0%        0%   0%    11%   2%   1%    812   0%

              53%   26%   10%    4%  24%  20%  26%  28%  22%      1%       0%      0%     11%  14%     7%     7%     42%( 27%)          0%        0%   0%    11%   2%   1%   2165   0%

              47%   21%    7%    1%  20%  16%  22%  25%  15%      1%       0%      0%     11%  13%     5%     5%     31%( 24%)          0%        0%   0%    10%   2%   1%    745   0%

              48%   22%    7%    2%  20%  16%  23%  25%  17%      1%       0%      0%     11%  14%     5%     6%     31%( 23%)          0%        0%   0%    11%   2%   1%    576   0%

              51%   25%   10%    4%  24%  21%  24%  28%  21%      1%       0%      0%     11%  14%     8%     7%     39%( 26%)          0%        0%   0%    11%   2%   1%   2481   0%

              49%   22%    7%    1%  20%  17%  22%  26%  16%      1%       0%      0%     11%  14%     5%     6%     31%( 23%)          0%        0%   0%    11%   2%   1%    621   0%

              54%   26%    9%    2%  23%  20%  23%  29%  21%      1%       0%      0%     11%  15%     6%     8%     36%( 26%)          0%        0%   0%    12%   2%   1%   1003   0%

              56%   27%   10%    3%  25%  21%  25%  30%  22%      1%       0%      0%     11%  14%     7%     7%     42%( 29%)          0%        0%   0%    13%   2%   1%   1990   0%

              28%   10%    3%    1%  11%   9%  12%  13%  11%      1%       0%      0%      6%   6%     3%     5%     16%( 12%)          0%        0%   0%     4%   2%   1%    772   0%

              35%    8%    3%    1%  12%   7%   8%   9%  24%      1%       0%      0%      4%   5%     1%    23%      3%(  2%)          6%        0%   0%     3%   1%   1%    455  27%

              70%   32%   14%    5%  31%  20%  26%  32%  43%      1%       0%      0%     10%  18%     3%    35%     24%( 14%)         14%        0%   0%    16%   2%   1%   1307 100%

             

            - Controller 2 (destination data/write operations)

             

            STOMTSZRH022> sysstat -x 1

            CPU    NFS   CIFS   HTTP   Total     Net   kB/s    Disk   kB/s    Tape   kB/s  Cache  Cache    CP  CP  Disk   OTHER    FCP  iSCSI     FCP   kB/s   iSCSI   kB/s

                                                   in    out    read  write    read  write    age    hit  time  ty  util                            in    out      in    out

            27%      0      0      0     964       2     29   12680  74424       0      0    15s    98%  100%  :f   26%       0    964      0   81903   3919       0      0

            13%      0      0      0     806       2     54    4272  75604       0      0    15s    96%  100%  :f   14%       0    796      0   48193   4850       0      0

            16%      0      0      0     928       1      2    1092  45676       0      0    16s    97%   62%  :    12%       0    928      0   66323   4963       0      0

            39%      0      0      0    1534       0      1   10424 114156       0      0    16s    98%   47%  Ff   32%      10   1523      0   75067   6098       0      0

            17%      0      0      0     998       1      0    4300  96052       0      0    15s    95%  100%  :f   14%       0    991      0   67154   4950       0      0

            14%      0      0      0    1073       0      1    7952  75848       0      0    15s    96%  100%  :f   14%       0   1073      0   57476   5303       0      0

            16%      0      0      0    1558       1      0    5884  26320       0      0    16s    96%   37%  :    12%       0   1558      0   60216   8393       0      0

              9%      0      0      0    1088       0      1    2344      0       0      0    16s    94%    0%  -     6%       0   1074      0   27371   5529       0      0

            65%      0      0      0    1643       1      0   19384 194184       0      0    14s    96%   95%  Ff   70%       3   1640      0  290315   2789       0      0

            61%      0      0      0    1052       0      1   22536 245736       0      0     6s    98%  100%  Bn   79%       0   1052      0  255065    313       0      0

            50%      0      0      0     490       1      1   16621 181924       0      0     6s    99%  100%  Bn   70%       0    490      0  174667    143       0      0

            62%      0      0      0     843       1      0   26105 305035       0      0     6s    98%  100%  B0   80%       0    843      0  177126   1635       0      0

            68%      0      0      0    1038       0      1   16042 301885       0      0     3s    97%  100%  B0   72%       0   1025      0  267981   1044       0      0

            62%      0      0      0     324       4      9   20706 297771       0      0     2s    98%  100%  B0   77%       3    321      0  174467    440       0      0

            64%      0      0      0     504       1      3   20889 305609       0      0     2s    98%  100%  #f   81%       0    454      0  185060    181       0      0

            75%      0      0      0    1700       1      2   40123 299639       0      0     2s    95%  100%  Bf   81%       0   1606      0  240323  16613       0      0

            72%      0      0      0    1534       1      0   33649 292647       0      0     2s    96%  100%  Bs   87%       0   1530      0  275515   5618       0      0

            73%      0      0      0     720       0      1   21492 312732       0      0     2s    98%  100%  Bs   74%       0    687      0  238782   3230       0      0

            68%      0      0      0     640       1      0   22592 299676       0      0     2s    98%  100%  Bs   76%       3    624      0   88215   2041       0      0

            CPU    NFS   CIFS   HTTP   Total     Net   kB/s    Disk   kB/s    Tape   kB/s  Cache  Cache    CP  CP  Disk   OTHER    FCP  iSCSI     FCP   kB/s   iSCSI   kB/s

                                                   in    out    read  write    read  write    age    hit  time  ty  util                            in    out      in    out

            51%      0      0      0    1126       0      1   19056  34468       0      0     3s    99%   34%  :    73%       0   1110      0   81281   3587       0      0

              8%      0      0      0     738       1      1    4568      8       0      0     3s    83%    0%  -     8%       0    736      0   27035   5874       0      0

            22%      0      0      0    1338       0      1    4050   5750       0      0     5s    91%    9%  Fn   24%       0   1338      0   64754   5178       0      0

            52%      0      0      0    1118       1      0   30473 215893       0      0     5s    99%  100%  :f   78%       0   1118      0   56154   3918       0      0

            16%      0      0      0     853       1      3    3800 104128       0      0     6s    94%   56%  :    18%       5    846      0   51258   5479       0      0

            17%      0      0      0    1389       1      1    1376     24       0      0     6s    94%    0%  -     8%       0   1381      0   76174   4204       0      0

            28%      0      0      0    1715       0      1    4095   5557       0      0     7s    96%   12%  Fn   12%       0   1707      0   71517   4881       0      0

            56%      0      0      0    1562       1      1   21544 184824       0      0     6s    98%  100%  :f   77%       0   1562      0  100949   3676       0      0

            17%      0      0      0    1218       1      8    8312  76140       0      0     6s    95%  100%  :f   15%       0   1218      0   61772   5020       0      0

            23%      0      0      0    2553       1      2    3780  47473       0      0    10s    97%   63%  :    14%     351   2194      0   61903  10645       0      0

            44%      0      0      0    1631       2     14   15616 120112       0      0    10s    98%   58%  Ff   45%       0   1625      0   62638   4184       0      0

            32%      0      0      0    1434       3     44    7644  77344       0      0    11s    98%  100%  :f   31%       0   1434      0   76846   4952       0      0

            27%      0      0      0    2007       1     37    5984 116332       0      0    11s    95%   93%  :    24%       0   2007      0  101008   6113       0      0

            46%      0      0      0    1459       2      4   15800 211828       0      0     9s    97%   67%  Ff   38%       0   1459      0   70722   5889       0      0

            23%      0      0      0    1436       0      1    5484 100020       0      0    10s    93%   69%  :    19%       3   1433      0   91953   5532       0      0

            10%      0      0      0    2076       1      0    2536      0       0      0    10s    98%    0%  -     6%       0   2062      0   17902   5562       0      0

            20%      0      0      0    1784       0      1     720      8       0      0    10s    97%    0%  -     5%       0   1770      0   87513   5683       0      0

            35%      0      0      0    1363       1      0   14829 155984       0      0    10s    94%   46%  Fs   34%       0   1338      0   52878   3292       0      0

            48%      0      0      0    2085       0      1   23420 112828       0      0    10s    99%  100%  :f   68%       0   1974      0   51894   4388       0      0

            18%      0      0      0    1279       1      1    2288  35296       0      0    10s    97%   47%  :    11%       3   1230      0   60525   4345       0      0

             

            STOMTSZRH022*> sysstat -M 1

            ANY1+ ANY2+ ANY3+ ANY4+  AVG CPU0 CPU1 CPU2 CPU3 Network Protocol Cluster Storage Raid Target Kahuna WAFL_Ex(Kahu) WAFL_XClean SM_Exempt Cifs Exempt Intr Host  Ops/s   CP

              61%   28%   16%    7%  29%  18%  20%  24%  53%      1%       0%      0%      8%  15%     6%    42%     28%( 13%)          2%        0%   0%    10%   2%   1%   1480  56%

              28%    9%    3%    0%  12%  12%  11%   9%  18%      1%       0%      0%      3%   1%     7%    10%     17%( 11%)          0%        0%   0%     0%   2%   8%   1964   0%

              67%   40%   23%   11%  36%  30%  31%  39%  43%      1%       0%      0%      8%  26%     7%    30%     33%( 16%)          9%        0%   0%    26%   2%   2%   1626  63%

              40%   14%    4%    1%  16%  10%  12%  12%  28%      1%       0%      0%      5%   7%     5%    22%     14%(  9%)          1%        0%   0%     5%   2%   1%   1755  41%

              25%    8%    2%    0%   9%  10%   7%   6%  15%      1%       0%      0%      2%   1%     6%     8%     17%( 11%)          0%        0%   0%     0%   2%   1%   1785   0%

              71%   51%   33%   17%  45%  39%  40%  46%  53%      1%       0%      0%      9%  30%     9%    34%     49%( 24%)         10%        0%   0%    30%   2%   5%   1935  64%

               9%    1%    0%    0%   3%   3%   4%   2%   3%      1%       0%      0%      2%   1%     2%     2%      3%(  2%)          0%        0%   0%     0%   1%   1%    657   0%

               9%    1%    0%    0%   3%   4%   4%   2%   3%      1%       0%      0%      2%   1%     2%     2%      3%(  2%)          0%        0%   0%     0%   1%   1%    756   0%

              15%    3%    1%    0%   5%   6%   6%   4%   6%      1%       0%      0%      3%   1%     4%     4%      6%(  5%)          0%        0%   0%     0%   2%   1%   1347   0%

              17%    5%    1%    0%   6%   5%   7%   4%   9%      1%       0%      0%      2%   1%     4%     5%     10%(  7%)          0%        0%   0%     0%   1%   1%   1061   0%

              19%    6%    2%    0%   7%   7%   6%   5%  11%      1%       0%      0%      2%   1%     4%     6%     12%(  7%)          0%        0%   0%     0%   2%   1%   1275   0%

              78%   48%   26%   10%  41%  34%  29%  39%  62%      1%       0%      0%      9%  21%    10%    42%     52%( 23%)          9%        0%   0%    17%   2%   1%   2132  84%

              83%   62%   47%   29%  56%  45%  49%  57%  72%      1%       0%      0%     10%  35%    12%    44%     77%( 29%)          8%        0%   0%    34%   2%   1%    962 100%

              81%   63%   48%   28%  57%  50%  48%  61%  67%      1%       0%      0%     10%  40%     9%    43%     69%( 27%)          9%        0%   0%    38%   2%   6%    750 100%

              79%   54%   40%   22%  50%  42%  39%  49%  69%      1%       0%      0%     10%  29%     9%    46%     65%( 24%)          5%        0%   0%    28%   2%   3%    920 100%

              87%   61%   41%   21%  53%  42%  41%  54%  74%      1%       0%      0%     10%  33%     9%    51%     62%( 24%)         10%        0%   0%    33%   2%   1%    733 100%

              84%   58%   42%   23%  52%  43%  40%  52%  74%      1%       0%      0%     11%  32%    10%    53%     59%( 22%)          8%        0%   0%    31%   2%   1%    851 100%

              86%   60%   43%   18%  52%  43%  42%  52%  72%      1%       0%      0%     10%  31%    10%    49%     66%( 25%)         10%        0%   0%    29%   2%   1%    803 100%

              86%   60%   44%   22%  54%  40%  43%  52%  79%      1%       0%      0%      9%  29%    11%    53%     72%( 27%)          7%        0%   0%    29%   2%   1%    978 100%

            ANY1+ ANY2+ ANY3+ ANY4+  AVG CPU0 CPU1 CPU2 CPU3 Network Protocol Cluster Storage Raid Target Kahuna WAFL_Ex(Kahu) WAFL_XClean SM_Exempt Cifs Exempt Intr Host  Ops/s   CP

              84%   49%   28%   13%  44%  29%  28%  41%  77%      1%       0%      0%     11%  33%     4%    71%     13%(  8%)          9%        0%   0%    31%   2%   1%   1311  74%

              34%    7%    2%    0%  11%   7%   8%   8%  23%      1%       0%      0%      5%   5%     4%    21%      6%(  5%)          0%        0%   0%     2%   2%   1%   1554   0%

              18%    4%    1%    0%   7%   8%   6%   4%   8%      1%       0%      0%      2%   1%     6%     5%      8%(  7%)          0%        0%   0%     0%   2%   1%   2088   0%

               9%    1%    0%    0%   3%   4%   4%   2%   3%      1%       0%      0%      2%   1%     2%     2%      3%(  2%)          0%        0%   0%     0%   1%   1%    810   0%

               9%    1%    0%    0%   3%   3%   4%   2%   3%      1%       0%      0%      2%   1%     1%     2%      3%(  2%)          0%        0%   0%     0%   1%   1%    491   0%

              11%    2%    1%    0%   4%   4%   4%   3%   5%      1%       0%      0%      2%   1%     2%     3%      5%(  4%)          0%        0%   0%     0%   1%   1%    903   0%

               9%    1%    0%    0%   3%   3%   4%   2%   3%      1%       0%      0%      2%   1%     1%     2%      2%(  2%)          0%        0%   0%     0%   1%   1%    401   0%

               9%    1%    0%    0%   3%   3%   4%   3%   3%      1%       0%      0%      2%   1%     2%     2%      3%(  2%)          0%        0%   0%     0%   1%   1%    591   0%

              12%    2%    0%    0%   4%   4%   4%   3%   5%      1%       0%      0%      2%   1%     2%     3%      4%(  4%)          0%        0%   0%     0%   1%   1%    768   0%

               8%    1%    0%    0%   3%   3%   4%   2%   3%      1%       0%      0%      2%   1%     2%     2%      2%(  2%)          0%        0%   0%     0%   1%   1%    605   0%

              29%    9%    3%    1%  11%  12%   9%   8%  14%      1%       0%      0%      4%   6%     2%    12%      3%(  3%)          9%        0%   0%     3%   2%   1%    771  23%

              34%   12%    3%    1%  13%  13%   7%  11%  21%      1%       0%      0%      5%   7%     2%    16%      9%(  6%)          3%        0%   0%     7%   1%   1%    669 100%

              17%    6%    1%    0%   7%   9%   6%   8%   5%      1%       0%      0%      3%   5%     2%     3%      4%(  3%)          0%        0%   0%     7%   1%   1%    557 100%

              21%    7%    1%    0%   8%  10%   5%   8%   8%      1%       0%      0%      4%   5%     1%     7%      4%(  3%)          0%        0%   0%     7%   1%   1%    442 100%

              10%    2%    1%    0%   4%   4%   3%   4%   4%      1%       0%      0%      2%   1%     2%     3%      4%(  3%)          0%        0%   0%     1%   1%   1%    819   9%

              10%    3%    2%    1%   4%   4%   5%   4%   5%      1%       0%      0%      2%   1%     3%     2%      6%(  3%)          0%        0%   0%     0%   1%   1%    739   0%

              96%   75%   54%   30%  64%  53%  55%  67%  81%      1%       0%      0%     10%  31%    21%    43%    109%( 42%)         11%        0%   0%    28%   2%   1%   1345  76%

              84%   63%   47%   27%  56%  45%  50%  54%  74%      1%       0%      0%     10%  31%    17%    46%     78%( 29%)          7%        0%   0%    30%   2%   1%    937 100%

              92%   69%   51%   27%  60%  49%  50%  59%  82%      1%       0%      0%      8%  32%    17%    54%     82%( 30%)         10%        0%   0%    34%   2%   1%    783 100%

              86%   63%   47%   29%  57%  46%  48%  59%  74%      1%       0%      0%     11%  38%    12%    49%     66%( 26%)         10%        0%   0%    37%   2%   1%    754 100%

             

             

            Thank you in advance regards

            • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
              thomas.glodde
              Currently Being Moderated

              hey,

               

              Controller 1: disk util is 100%. Disk util shows the highes usage of a single disk in the systems. Means you can have an aggregate at 20% and another aggregate at 100% and it will always show you the most busy one, so 100%

               

              Controller 2: CP time 100% a few times in a row. CP means consistency points, the netapp WAFL filesystems writes a "checkpoint" so to say every 10 seconds, each time a snapshot is done or as soon as the NVRAM write log is full. If you write too much it will sort of run from CP to next CP within seconds, we call that a back 2 back cp. Bigger NVRAM would help as disks are not 100%.

               

              Conslusions: You might need more disks for your workload and maybe a bigger head for more write cache. There has been a KB article with optimizations for sequential i/o, couldnt find it that quick tho.

              • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
                AXISDATANETWORK
                Currently Being Moderated

                Hi Thomas,

                 

                Yes I agree, controller 1 has a high disk utilization, for all of then, as you can see on a gathered with statit for this test case:

                disk             ut%  xfers  ureads--chain-usecs writes--chain-usecs cpreads-chain-usecs greads--chain-usecs gwrites-chain-usecs

                /aggr1/plex0/rg0:

                0b.04.11           5   7.88    0.13   1.00  1933   7.39  61.41   104   0.36  27.13   163   0.00   ....     .   0.00   ....     .

                0b.04.10           5   8.05    0.13   1.00  1571   7.63  59.52   104   0.30  19.30   187   0.00   ....     .   0.00   ....     .

                0b.04.9           93 252.71  243.50   6.34  3620   7.30  59.79   570   1.91  13.11  1336   0.00   ....     .   0.00   ....     .

                0b.04.2           95 255.80  246.52   6.33  3924   7.20  60.58   606   2.07  11.90  1781   0.00   ....     .   0.00   ....     .

                0b.04.0           94 255.33  245.91   6.32  3737   7.23  60.05   555   2.20  12.55  1391   0.00   ....     .   0.00   ....     .

                0b.04.1           94 254.11  244.98   6.34  3715   7.20  60.78   576   1.93  12.66  1383   0.00   ....     .   0.00   ....     .

                0b.04.3           94 255.51  246.00   6.32  3655   7.19  60.21   624   2.32  12.27  1562   0.00   ....     .   0.00   ....     .

                0b.05.7           98 255.56  246.06   6.34  4414   7.22  60.17   616   2.28  11.96  2066   0.00   ....     .   0.00   ....     .

                0b.04.5           94 255.76  246.36   6.45  3650   7.21  60.56   567   2.19  11.97  1545   0.00   ....     .   0.00   ....     .

                0b.04.6           94 253.77  244.79   6.27  3797   7.19  60.90   601   1.78  13.79  1538   0.00   ....     .   0.00   ....     .

                0b.04.7           93 253.91  244.85   6.32  3662   7.21  60.90   617   1.85  12.80  1398   0.00   ....     .   0.00   ....     .

                0b.04.8           95 253.81  244.92   6.39  3756   7.20  61.16   592   1.69  12.87  1538   0.00   ....     .   0.00   ....     .

                /aggr1/plex0/rg1:

                3a.02.0            4   7.61    0.00   ....     .   7.25  62.75    97   0.37  26.22   162   0.00   ....     .   0.00   ....     .

                3a.02.1            5   7.71    0.00   ....     .   7.35  61.87   100   0.36  25.28   172   0.00   ....     .   0.00   ....     .

                3a.02.2           98 253.59  244.58   6.29  4462   7.19  60.79   659   1.82  13.42  1960   0.00   ....     .   0.00   ....     .

                3a.02.3           97 248.70  240.12   6.39  4384   7.22  61.21   640   1.35  14.53  2195   0.00   ....     .   0.00   ....     .

                0b.05.6           98 249.72  240.89   6.31  4486   7.20  60.93   646   1.62  13.98  2330   0.00   ....     .   0.00   ....     .

                3a.02.5           98 254.41  245.70   6.35  4429   7.19  61.14   644   1.52  13.95  1894   0.00   ....     .   0.00   ....     .

                3a.02.6           98 249.97  241.28   6.46  4354   7.21  61.49   650   1.48  12.67  1956   0.00   ....     .   0.00   ....     .

                3a.02.7           97 250.32  241.39   6.40  4262   7.21  60.97   727   1.71  13.77  1780   0.00   ....     .   0.00   ....     .

                3a.02.8           97 249.75  240.97   6.39  4377   7.23  60.99   634   1.55  14.85  1862   0.00   ....     .   0.00   ....     .

                3a.02.9           98 250.72  241.94   6.31  4527   7.23  60.84   664   1.55  14.83  1783   0.00   ....     .   0.00   ....     .

                3a.02.10          98 251.77  242.99   6.34  4396   7.21  61.04   665   1.57  13.27  1847   0.00   ....     .   0.00   ....     .

                3a.02.11          98 251.95  243.33   6.33  4481   7.21  61.39   657   1.41  13.18  2192   0.00   ....     .   0.00   ....     .

                 

                Yes I agree, with your that with this values the solution could be to add more disks, but my question are:

                - Why with a EMC storage (entry level) with 8 disks SAS 15k rpm and 1 Gbyte of write cache we can get a better latency executing this test than with a NetApp FAS3240  with 24 disks SAS 10k rpm and 8 Gbytes of write cache?

                - If I am running the expdp process between 00:00-07:00 why the issue only happen when I export the database biggest tables as you can see on the 

                 

                EXPD_storage_stats.JPG

                Could be a bug or is the expected behaviour?

                 

                Thank you in advance, regards

                 


                • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
                  Erick Moore
                  Currently Being Moderated

                  In this chart your latency drops around 3AM, but your throughput remains the same. I suspect there are other things running around midnight that are having an impact. Please open a case with NetApp Global Support to verify what is impacting your data pump process.

                  • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
                    AXISDATANETWORK
                    Currently Being Moderated

                    Hi Erick,

                     

                    Thank you about your feedback.

                     

                    I think so, because is a ideal environment, an aggregate connected to a single machine dedicated to run a single database.

                     

                    We have all ready open a case with NetApp Global Support and has been closed by himself with the following conclusion:

                    - To improve the performance of the Controller 1 increase the number of disk to support the load (with 24 disk (12+12) I can not reach the performance of my previous storage EMC with 8 disks)

                    - To improve the performance of the Controller review if I can migrate to Data Ontap 8.1.2 P3

                    Both operations are non rollback (in a easy way) and I do not know with improvement I could expect.

                     

                    We have added two new disk to the Controller 1 and the improvement has ben more than 50%, please review the following post.

                     

                    Because of that. my sensation is I do not have a mechanical issue (26 disk could not get a 50% improvement than 24 disk), is a Data Ontap bug or the expected behaviour.I have reviewed some forums in with some guys report an unstable performance behavior when you have raid groups lower than 16 disks but I can not found any graph or detailed test.

                     

                    Any suggestion are welcome.

                     

                    Thank you in advance, regards

        • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
          Currently Being Moderated

          hey guys,

          is it possible to post the AWR reports for both the EMC and NetApp environments? Possible to get a  Perfstat posted as well? Last request - do the controllers send ASUP data? Would be nice to see a bit of the configuration about the controllers too...

           

          Thanks

          Greg

          • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
            AXISDATANETWORK
            Currently Being Moderated

            Hi Igreg

             

            Yes I can share with you the AWR and the perfstats, please let me know how can I do it, sorry I am new in this communities

             

            To the last question, yes controllers send Autosuport data to NetApp.

             

            Thank you about your feedback.

             

            Regards

            • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
              thomas.glodde
              Currently Being Moderated

              Going to ONTAP 8.0.5 could help, yes.

               

              You usualy only have issues if the data is large sequential and does not fit into NVRAM (1GB per Head on a FAS3240). NetApp isnt a single thread optimized solution per Default but strong on multithread small random i/o.

               

              Ever considered opening a performance case at netapp global support?

              • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
                AXISDATANETWORK
                Currently Being Moderated

                Hi Thomas,

                 

                We have deployed 8.0.2P6 because was the recommended configuration for our environment do it by the partner who install the storage. I will review the compatibility matrix in order to review if my environment is compatible with this release.

                 

                Yes, I only have issues if the data is large sequential and does not fit into NVRAM, Please, could you explain to me with different there are between "Memory size " reported by sysconfig (8 Gbytes for FAS3240) and "NVMEM III size" reported by nv ( 1 Gbyte) because up to now I was thinking that I have 8 Gbytes of memory cache.

                 

                Yes we have already opened a performance case at netapp global support, it is opened since January, and the only solution offered up to know is to increase the number of disks because as you can see the disk utilization is 100%, but I can not got any explanation about the root causes of this behavior only in this scenario.

                 

                Thank you about your feedback, regards

                • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
                  thomas.glodde
                  Currently Being Moderated

                  hi there,

                   

                  the FAS3240 has 8GB of RAM per controller for its operating System which includes kernel spaces, read cache and write cache. The filesystem transaction log will be written in a 1GB part of that 8GB of Memory which is battery power backed up in case of a sudden outage. So your system has 7GB of RAM to use (read/write cache size may then vary depending on configuration or current workload) but the filesystem transaction log will always be "stuck" at 1GB.

                   

                  During sequential i/o this log will be filled quickly and needs a few disks to be flushed fast enough. A real life Performance experience for a FAS3240 with plenty of disks (about 42 15k disks) would be about 1000MByte read and about 400MBytes write (as seen by plenty of our customers).

                   

                  Your first controller seems to suffer from too few spindles to give good read performance and the second Controller seems to suffer from too few spindes to properly flush the write cache back to back/too small cache.

                   

                  If you have no FlashCache SSD read cache modules in your System, you might consider adding FlashPool SSDs as read/write cache to your System. But be sure that your average workload fits into the provided SSD cache space.

                   

                  Good luck!

                  Thomas

                  • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
                    AXISDATANETWORK
                    Currently Being Moderated

                    Hi Thomas,

                     

                    Thank you very much four your help, you replays are very useful try to understand my problem.

                     

                    Please, could you suggest me any document, book, what ever about the NetApp architecture, I could not find any reference to the "filesystem transaction log".

                     

                    My second controller has 40 (18+2/18+2) 10k SAS disks, and appear to be not enough to support a database export datapump

                     

                    I have SSD, but I can not create a FlashPool SSDs because Oracle asmlib do not work properly with the NetApp 8.1 release (see metalink alert 1500460.1) we are using like normal pool.

                     

                    Yesterday we have added two new disk to my first controller (10+2/10+2) (one per raid group) and execute a reallocate force of the read volume source, and we have reduce latencies from 50ms to 30ms. NetApp recommend a raid groups of 16 disks I do not know why, please, could you suggest me any document to try to understand the improvement gathered with this change?.

                     

                    Thank you in advance, regards

                     


                    • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
                      thomas.glodde
                      Currently Being Moderated

                      hey,

                       

                      in deepth explanations of how & why WAFL works are not publicly available, most of my knowledge comes from trying plenty of stuff myself and dealing with over 200 customers in the last 5 years ;-)

                       

                      In regards of aggregates and raid groups, you could give TR-3838 (Storage Subsystem Configuration Guide) as well as TR-3437 (Storage Best Practices) a try. Generaly speaking, the bigger an aggregate is, the better the performance. For sequential workloads bigger raid groups (22 disks+) are good due to more disks in one raid group and less parity calculation, for small random i/o smaller raid groups (16-20 disks) are ok for less read-ahead-for-parity calculation.

                       

                      Your first controller possibly just needs more disks for the sequential i/o. Your second controller seems overwhelmed due to small write Cache. flashpool could help as it can flush the write cache faster than SAS disk. Besides engange netapp global Support on how to optimize a System for sequential i/o, they can increase read ahead sizes for example (vol options <volname> minra on/off, no_atime_update on/off and some aggregate settings).

                       

                      Kind regards

                      Thomas

                    • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
                      AXISDATANETWORK
                      Currently Being Moderated

                      Hi,

                       

                      On 17/04 we have added two new disk (same size and performance 600 Gbytes SAS 10k rpm) to the aggregate 1 (10+2/10+2) to increase the number of mechanical disk.

                       

                      Once added the disk we forced a reallocated of the database data volume to spread the information for all the disk

                       

                      After three business days we gather the same performance because of that I think that this values could be more or less stable:

                       

                      Before the change:

                      Performance_16042013.JPG

                       

                      After the change:

                      Performance_19042013.JPG

                       

                      My conclusions are:

                      - We have reduce the latency peak from 70 ms to 40 ms and the overall amount of time with latencies bigger than 20 ms

                      - We have increase the throughput peak from 17,5 Mbps to 20 Mbps

                      - We have increased the IOPs peak from 400 to 500 ms

                       

                      Now I am afraid, If I add more disk I will improve the performance or I will return to my previous scenario?

                       

                      Any suggestions?

                       

                      Thank you in advance, regards

                      Regards

  • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
    EDUARDO.YANES
    Currently Being Moderated

    Hi.

     

    We will be in a very similar situation like yours, as we have just adquired a 3220HA for main Datacenter and are in the migration path from an old HDS and  a small EMC  ( DB storage ) to the new NetApp. Also we are running daily datapumps at night, and our ASM config ( RAC, two nodes ) is built of small 100G volumes from the EMC... So, very similar indeed.

     

    We will be subscribed to this case.Will provide feedback about our tests at the secondary DC ( FAS2240HA ) as soon as possible ( hope soon ).

     

    Cheers.

  • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
    HENRYPAN2
    Currently Being Moderated

    Hi Axisdata Network,

     

    You may wish to double check the backup & AV schedule to see which processes are running around midnight.

     

    Good luck

     

    Henry

    • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
      thomas.glodde
      Currently Being Moderated

      Additionaly you can run a sis status -l and check for start time as well as duration of any dedupe operations.

    • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
      AXISDATANETWORK
      Currently Being Moderated

      Hy Henry

       

      Around midnight backup process are running, but database backup runs from 00:00-06:00 with a parallelism of 2. and the issue only happens when I export biggest tables and the throughput is more or less the same. We have a test case and we can reproduce this issue in any moment.

       

      Take into account that this is a ideal environment, an aggregate connected to a single machine dedicated to run a single database, because of that we have isolate the issue.

       

      Regards

      • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
        HENRYPAN2
        Currently Being Moderated

        Hi Axisdata Network,

         

        You may wish to try Balance to ping point the bully process or escalate this case to the NA performance team for in deep analysis.

         

        Good luck & Good w/e

         

        Henry

      • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
        Currently Being Moderated

        Hey,

        See if you can upload the AWR report for prior/post change, as well as a perfstat for pre/post....

         

        Use the following:

        https://upload.netapp.com/hq/Userfile

         

         

        And, for the user name - use lgreg@netapp.com

         

         

        As others pointed out - the environment was quite busy. And just adding 2 disks tot he environment may be an indication that your were on the edge, and that little bit helped. Would be curious to see the wait events in Oracle as well as the type of IO (ie random or sequential)But, lets see if you can upload the AWR and PErfstat..

         

        Questions:

        Is there a significant difference between the EMC and Netapp in terms of memory/cache?

        Is there a difference in the SGA size when using the different storage?

        Is there a difference in the nbr of luns? Are the hosts properly configured for the SNA/iSAN stack for the host OS?

        Be careful in regards to what you read with Metalink note 1500460.1 - there are some unique OS versions that this is impacted upon. As well as it was in regards to an "upgrade" from one version of ONTAP to another. I sense that you are in a "new deployment" based on the thread.

         

        But regardless - see if you can upload the AWR reports from the EMC and with where you are now at this point..Would also be good to see perfstat for the pre/post change with the additional disk too..

         

        Regards,

        • Re: Oracle Database 11.2 slow performance on NetApp FAS3240
          AXISDATANETWORK
          Currently Being Moderated

          Hi Igreg,

           

          Sorry but this week I have other issues more critical that this one.

           

          Next week I will upload the requested files.

           

          About your questions:

          Is there a significant difference between the EMC and Netapp in terms of memory/cache?

          EMC AX4 has 1 Gbytes of cache, is a entry level storage.

           

          Is there a difference in the SGA size when using the different storage?

          No, SGA size has been the same

           

          Is there a difference in the nbr of luns?

          We have increased the LUN size from 50 Gbytes on EMC to 100 Gbytes on NetApp due our current size.

           

          Are the hosts properly configured for the SNA/iSAN stack for the host OS?

          I hope so , I have reviewed the netapp best practices about it an the system is setup as suggested

           

          Be careful in regards to what you read with Metalink note 1500460.1 - there are some unique OS versions that this is impacted upon. As well as it was in regards to an "upgrade" from one version of ONTAP to another. I sense that you are in a "new deployment" based on the thread.

          This note is the reason about we are working on a 8.0.2 instead a 8.1. This week Oracle has published an upgrade to solve it, I will deploy next weeks.

           

          Regards

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