ONTAP Hardware

3240 filer with high CPU utilization

rajdeepsengupta
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My 3240 filer is showing very high CPU utilization. I have done a tech refresh from 3040 & 3020 to 3240 (ontap 7.3.6 to 8.1P1)

So other than disk shelve everything else is a fresh in the 3240 including PAM modules.

The new filer performance is obviously better now.

But my new filer CPU utilization is very high.

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

  90%   58%   31%   12%  50%  46%  46%  49%  62%     47%       0%      0%      6%  10%     0%    26%     77%( 54%)          7%        0%   0%    14%   9%   6%  13529  94%

  95%   69%   39%   16%  59%  55%  55%  59%  66%     56%       0%      0%      7%  14%     0%    24%     86%( 60%)          7%        0%   0%    20%  11%   9%  13489 100%

  88%   58%   29%   10%  50%  46%  47%  50%  56%     60%       0%      0%      5%  10%     0%    22%     67%( 50%)          4%        0%   0%    13%  11%   7%  17440  75%

  95%   65%   37%   17%  57%  50%  50%  57%  70%     52%       0%      0%      8%  14%     0%    32%     82%( 54%)          3%        0%   0%    17%  10%   8%  15628  75%

  87%   57%   29%    8%  56%  53%  55%  60%  56%     45%       0%      0%      8%  15%     0%    19%     69%( 51%)          6%        0%   0%    16%   9%  38%  13040  76%

Also if I see the WAFL scan status, it shows the following

Volume vol0:

Scan id                   Type of scan     progress

       1    active bitmap rearrangement     fbn 791 of 3959 w/ max_chain_len 3

Volume vol1:

Scan id                   Type of scan     progress

       2    active bitmap rearrangement     fbn 1108 of 13474 w/ max_chain_len 3

Volume vol2:

Scan id                   Type of scan     progress

       3    active bitmap rearrangement     fbn 159 of 356 w/ max_chain_len 3

Volume vol3:

Scan id                   Type of scan     progress

       4    active bitmap rearrangement     fbn 311 of 356 w/ max_chain_len 3

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Let me know if anyone find some good reason for the high CPU utilization.

Thanks

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