Couchbase Server

Performance Status

05/21/2014

KV


  • MB-11143:  Avg. BgFetcher wait time is still 5-6 times higher in 3.0 (on slow HDD)
  • MB-11083: Very high CPU utilization (1700%) and growing disk queue when compaction is running
  • MB-11005:   Erlang memory in KV test case with 10 buckets is too high (up to 30GB, leading to OOM situation)
  • MB-10771: Delta recovery is slower than full recovery. Meanwhile several performance issues encountered.

    • KV


  • MB-10679: It takes almost 10 minutes to stop Couchbase service in setup with 10 empty buckets
  • MB-10370:   ep-engine deadlock in write-heavy DGM cases 
  • MB-9676:  Dramatically increasing latency of SET operations during rebalance tests
  • MB-9620: (or just kill mccouch) multi-tenancy: beam.smp memory usage optimization for non-views cases
  • MB-9461:  In heavy-DGM (<5%) scenarios with views and high cache miss rate rebalance/client operations can fail due to timed out requests to memcached/ep-engine

    • XDCR


    • MB-11058:  Failover during data load with enabled XDCR
    • MB-10943:  Erlang memory usage goes up to 60GB in XDCR setups [was: Source node auto failed over during initial data load with XDCR]
    • MB-10437: XDCR replication rate drops almost to zero in presence of light write workload on src side
    • MB-7907: Issues when scaling XDCR on single node

    Views


    • MB-10956:  Rebalance-in with views takes 10 hours (used to be 70 minutes)
    • MB-10273:   View compaction doesn't catch up in basic non-DGM tests with view queries
    • MB-9822:  One of nodes is too slow during indexing

    Windows


  • MB-10191: CouchDB crashed due to 'Cannot allocate 467078560 bytes of memory (of type "heap").'
  • MB-9825: Rebalance exited with reason bad_replicas

    • n1ql


    • MB-11141: SELECT COUNT(*) ... WHERE should avoid memcached operations
    • MB-11140: SELECT DISTINCT scans all docs
    • MB-11048: Range queries result in thousands of GET operations/sec

    BACKLOG


    • [ongoing] Query performance testing
    • More "observe" tests
    • Mobile dashboard
    • SmartOS + DTrace

    CBIT ZONE


    • CBIT-1182: client machines for regression tests
    • CBIT-1158:  RAID 10 drives for performance testing
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