Couchbase Server

Performance Status

05/07/2014

General News


  • MongoDB performance testing

new tickets


  • MB-11058: Failover during data load with enabled XDCR

workaround-ed


  • MB-11005: Erlang memory in KV test case with 10 buckets is too high (up to 30GB, leading to OOM situation)
  • MB-10943: Erlang memory usage goes up to 60GB in XDCR setups [was: Source node auto failed over during initial data load with XDCR]

    • Still not closed


    • MB-10956: Rebalance-in with views takes 10 hours (used to be 70 minutes)
    • MB-10959: Rebalance exited {noproc, {gen_server,call, [{'janitor_agent-bucket-1','ns_1@172.23.96.16'}, {if_rebalance,<0.26548.32>, {update_vbucket_state,933,active,undefined, undefined}}, infinity]}}
    • MB-11004: Rebalance with views fails due to "wait_checkpoint_persisted_failed"

    STILL NOT CLOSED


    • MB-10533: Compaction doesn't make any progress in spite of high fragmentation
    • MB-10437: XDCR replication rate drops almost to zero in presence of light write workload on src side
    • MB-10370:  ep-engine deadlock in write-heavy DGM cases 
    • MB-10273:  View compaction doesn't catch up in basic non-DGM tests with view queries

    2.X DEBT


    • MB-9620: (or just kill mccouch) multi-tenancy: beam.smp memory usage optimization for non-views cases
    • MB-9930: regression in memory fragmentation in tcmalloc with appends ops(2.5.0v2.2.0)
    • MB-9676: Dramatically increasing latency of SET operations during rebalance tests
    • MB-9637: Rebalance-In 5 nodes on empty 18 buckets is very slow per bucket

    2.X DEBT


  • MB-9822: One of nodes is too slow during indexing
  • MB-9825: Rebalance exited with reason bad_replicas
  • 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
  • MB-10191: CouchDB crashed due to 'Cannot allocate 467078560 bytes of memory (of type "heap").'
  • MB-7907: Issues when scaling XDCR on single node

    • n1ql issues


    • MB-11048: Range queries result in thousands of GET operations/sec
    • MB-10948:  cbq-engine crashes under very light load

    BACKLOG


    • [ongoing] Query performance testing

    BLOCKERS


    • MB-10472:  Handle multiple snapshots properly in view engine 
    • MB-11027:  erlang crash on 3.0 windows build 
    • CBIT-1182: client machines for regression tests
    • CBIT-1158:  RAID 10 drives for performance testing
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