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  1. Couchbase Server
  2. MB-32433

[plasma] MemTuner examine RSS before incrementing for smoother control

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    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 

      Attachments

        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

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            People

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

                Created:
                Updated:
                Resolved:

                PagerDuty