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