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  1. Couchbase Server
  2. MB-32433

[plasma] MemTuner examine RSS before incrementing for smoother control

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    • Triaged
    • No

    Description

      Currently plasma mem tuner logic decrements memory quota and forces GC when the indexer process RSS overshoots user quota by 15% but the increment logic does not examine RSS before choosing to restore the quota.

      This results in spiky RSS and frequent forced garbage collection.

      Better to use examine RSS and only increment if the RSS is below user quota.

      Inspiration: PID controller 

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        Issue Links

          backports to

          Bug - A problem which impairs or prevents the functions of the product. MB-32636 [BP 5.5.4] - [plasma] MemTuner examine RSS before incrementing for smoother control

          • Major - Major loss of function.
          • Closed
          causes

          Bug - A problem which impairs or prevents the functions of the product. MB-32861 [Plasma-dgm] 15% slower indexing in DGM after MB-32433 change

          • Major - Major loss of function.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MB-32595 [FTS] reuse/incorporate latest GSI memory-mgmt improvements into FTS

          • Major - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. MB-32544 [5.1.3 BP MB-32433] - [plasma] MemTuner examine RSS before incrementing for smoother control

          • Major - Major loss of function.
          • Closed
          For Gerrit Dashboard: MB-32433
          # Subject Branch Project Status CR V
          103130,3 MB-32433 mem: Only increment if RSS < quota unstable plasma Status: MERGED +2 +1
          103264,1 MB-32433 Backport of mem: Only increment if RSS < quota alice plasma Status: MERGED +2 +1
          104529,1 MB-32433 mem: Only increment if RSS < quota vulcan plasma Status: ABANDONED 0 0

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              mihir.kamdar Mihir Kamdar (Inactive)
              sundar Sundar Sridharan (Inactive)
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              Dates

                Created:
                Updated:
                Resolved:

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