Couchbase Server performing compaction

Solution In Progress - Updated -

Issue

  • Couch Base DB server becomes hung and recieves "out of memory" errors despite there being plenty of free memory.
  • High fragmentation of memory is observed resulting in memory reclamation functions being called.
  • This eventually results in a hung system caused by inability to allocate higher order memory pages.

Environment

  • Observed, but not limited too:
    • Red Hat Enterprise Linux Server 7
  • Couchbase Server DB
    • Memcached

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