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  1. Couchbase Server
  2. MB-26307

Improve periodic CPU spikes on indexer nodes during moi disk snapshot persistence

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Details

    • Bug
    • Resolution: Fixed
    • Critical
    • 5.5.0
    • 4.5.1, 4.6.0, 4.6.1, 4.6.4, 4.6.2, 4.6.3, 4.6.5, 5.0.0, 5.0.1, 5.1.0, 5.1.1, 5.1.2
    • storage-engine
    • Yes
    • CBSS Sprint 03-16-2018

    Description

      Background

      Every 10 mins GSI indexes writes a snapshot is to disk.

      Problem

      When snapshotting is happening the CPU usage burst to 100%, there is a a suggestion that this could have an impact on index scan latency and to the other services running on the node (Data, Query, Search, etc)

      Workaround

      Decrease the number of persistence thread(this workaround is only effective if "number of indexes" < "number of cores" as minimum 1 persistence thread gets assigned to each index) 

      curl -X POST -u <user:pass> http://localhost:9102/settings --data '{"indexer.settings.moi.persistence_threads": 1}'

      Attachments

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. MB-26063 MOI persistence threads should be based on cpu allocation

          • Major - Major loss of function.
          • Closed
          is triggering

          Bug - A problem which impairs or prevents the functions of the product. MB-30663 MOI: Indexer memory consumption increased drastically after upgrading from 4.5.1 to 5.5.0

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MB-30250 [GSI] indexer.settings.max_cpu_percent does not take effect

          • Major - Major loss of function.
          • Closed
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              mahesh.mandhare Mahesh Mandhare (Inactive)
              jeelan.poola Jeelan Poola
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              Dates

                Created:
                Updated:
                Resolved:

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