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  1. Couchbase Server
  2. MB-61021

Investigate regression in load throughput seen when increasing NonIO threads

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Details

    • Bug
    • Resolution: Unresolved
    • Major
    • 7.6.2
    • 7.6.0
    • couchbase-bucket
    • None
    • Untriaged
    • 0
    • Yes
    • March-June 24

    Description

      Continuation from AV-73583 / MB-60986.

      We see a performance regression of ~25% in 7.6.0 when compared to 7.2.4, when 7.6.0 is set to use the same number of NonIO threads.

      For the purposes of unblocking Trinity release, we've reverted 7.6.0 to use the same number of NonIO threads as 7.1.x, as that brings 7.6.0 performance to 7.2.4 levels on the 7.5M documents x 5-bucket load test.

      CB Version NonIO threads as % CPUs Result
      7.1.0-7.1.5 30% N/A
      7.2.0-7.2.4 50% baseline
      7.6.0 50% regression
      7.6.0 30% no regression

      Test config

      test_config cloud/kv/capella_yscb_workloada_3nodes_375m.test
      cluster ec2_7s_1c_r5_2xlarge_m5_xlarge_c5_2xlarge.spec
      override load.items.7500000 cluster.mem_quota.12418 cluster.monitor_deployment_time."" cluster.show_cp_version.""
      cherrypick git fetch https://review.couchbase.org/perfrunner refs/changes/20/199520/12 && git cherry-pick FETCH_HEAD && git fetch https://review.couchbase.org/perfrunner refs/changes/46/200846/52 && git cherry-pick FETCH_HEAD
      ec2_setup playbooks/ec2_basic.yml

      Results

      https://docs.google.com/spreadsheets/d/1wlF7Z6taMeAObmh0ZdkTxYgyZhzgRRGfDwG5HC5ockg/edit#gid=0
       

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        1. image-2024-03-05-11-34-55-159.png
          280 kB
          Vesko Karaganev
        2. image-2024-03-05-11-35-17-382.png
          265 kB
          Vesko Karaganev

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              pavlos.georgiou Pavlos Georgiou
              vesko.karaganev Vesko Karaganev
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              Dates

                Created:
                Updated:

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