Steps To Remedy NetApp CPU Usage

These instructions will help you when you have Netapp CPU usage.

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    Category:
    cluster-data-ontap-8
    Specialty:
    perf
    Last updated:

    Applies to

    • ONTAP 9
    • ONTAP 8 Cluster Data
    • Data ONTAP 8 7 Mode
    • Data ONTAP 7 earlier

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    Throughout the system view, use the command layer to see real-time CPU usage:

    Grouped ONTAP data:

    netapp ::> set diagonal
    Warning: Most of these diagnostic commands are intended for use by NetApp personnel only.
    Do you want to continue? N: j
    netapp :: *> start node -node netapp-01 sysstat -M 1
    ANY1 + ANY2 + ANY3 + ANY4 + ANY5 + ANY6 + ANY7 + ANY8 + ANY9 + ANY10 + ANY11 + ANY12 + ANY13 + ANY14 + ANY15 + ANY16 + AVG
    100% 100% 100? % 37% 81%
    netapp cpu usage

    UC0 UC1 UC2 UC3 UC4 UC6 UC5 UC7 UC8 UC9 UC10 UC11 UC12 UC13 UC14 UC15
    78% 76% 77% 83% 83% 82% 82% 82% 82% 82% 83% 84% 84% 83% 82% 83% 83% 82%

    Nwk_Excl Nwk_Lg Nwk_Exmpt Raid Storage Protocol Raid_Ex Purpose Kahun WAFL_Ex (Kahu)
    3% 2% 450% 0% 0% 0%)

    WAFL_XClean SM_Exempt Cifs Exempt SSAN_Ex Intr Host Ops / s CP
    0% 0% 0% 112% 0% 28% 8% 47111 0%

    In this example, the averageI have a CPU utilization of seventeen cores at 81%.

    • 511% free WAFL
    • 450% free of charge.
    • RAID 136%, then 112% freed.
    • WAFL was active for 98% of the sample interval, of which 4% were for sequential processing, 94% for parallel processing.
    • The processing of the serialized WAFL is small, it is very likely that more work will be done by parallelizing the WAFL at the end.
    • 98% activity throughout the sample interval is not a problem without other performance indicators involved.
    • CPU shares are becoming scarce, which increases the likelihood of the CPU being queued and potentially causing client latency.
    Data ONTAP 7 Mode:

    netapp> Priv set diag
    netapp *> sysstat -M 1
    ANY1 + ANY3 + Any2 + ANY4 + AVG CPU0 CPU1 CPU2 CPU3
    93% 80% 36% 15% 56% 38% 32% 82% 72%

    Nwk_Excl Nwk_Lg Nwk_Exmpt Raid Storage Protocol Raid_Ex Kahun Assignment
    1 68% 1 0% 0% 4% 0% 19% 0% 11%

    netapp cpu usage

    WAFL_Ex (Kahu) WAFL_XClean SM_Exempt Cifs Exempt SSAN_Ex Intr Host Ops / s CP
    80% (75%) 14% 0% 0% 24 %%

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  • In this example, the average CPU usage is 56% and the URL is a website nwk_legacy (maximum concurrency 1) is 68%.

    • To analyze the bottleneck for WAFL, Kahuna is 11% more than WAFL_Ex totaling 75% or 86%:
      • Since this value is <100%, this element is not a bottleneck. However, whether or not it approaches 100%, it probably still won't be a problem for other metrics to contribute.
    • Although CPU utilization (logical and physical) is only disclosed by Data ONTAP, it is possible that CPU utilization should not be used as a first value when evaluating overall system performance.
        Instead, the input and results associated with the user being asked to complete the task must be first-order metric.
    • It is recommended that you focus on the actual latency for receiving services (response time) and the set of processes that are handled in case of I / O requests or byte (bandwidth) problems.
    • This performance method is relevant to a specific workload and ignores thethe false nature of logical and ancient variations in processor planning.

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