Couchbase Server

Performance Status

07/23/2014

Bug Snapshot

Last Wednesday:
  • Blockers: 3
  • Critical: 6
  • Major: 2

Today:
  • Test Blockers: 1
  • Blockers: 7
  • Critical: 5
  • Major: 2

KV


  • MB-11801: It takes almost 2x more time to rebalance 10 empty buckets
  • MB-11799:  Bucket compaction causes massive slowness of UPR consumers
  • MB-11794:  Creating 10 buckets causes memcached segmentation fault
  • MB-11779:  Memory underflow in updates-only scenario with 5 buckets
  • MB-11768:  movement of 27 empty replica vbuckets gets stuck in seqnoWaiting

    • KV


  • MB-11738:  Evaluate GIO CPU utilization on systems with 16 vCPU
  • MB-11731: Persistence to disk suffers from bucket compaction
  • MB-11729: CPU utilization by memcached suddenly increases (~2-3x) after couple hours, IO operations affected
  • MB-11675:  40-50% performance degradation on append-heavy workload compared to 2.5.1
  • MB-11642: Intra-replication falling far behind under moderate-heavy workload

    • KV


  • MB-11582:  tmp_oom errors due to spike in memory usage during delta recovery
  • MB-11405:  Shared thread pool: high CPU overhead due to OS level context switches / scheduling

    • Views


    • MB-11752: Rebalance from 3 to 4 nodes [with views] fails due to "{unexpected_exit, ..., {bulk_set_vbucket_state_failed..."
    • MB-11728: Improve stale=update_after query latency

    XDCR


    • MB-11770: Re-investigate impact of xdcrMaxConcurrentReps on XDCR latency (LAN/WAN) and choose safer value for 3.0
    • MB-11643:  Incoming workload suffers when XDCR enabled
    • MB-11435: 1500-2000% CPU utilization by beam.smp on source nodes in XDCR scenarios (was ~500% in 2.5.x)
    • MB-11434:  600-800% CPU utilization by memcached on source nodes in XDCR scenarios (was <100% in 2.5.x)

    MISC


    • MB-11798: Operations to create user and create session in Sync Gateway are slower with 3.0 Beta

    BACKLOG


    • revAB_sim -> perfrunner
    • stale=ok tests
    • SystemTap & DTrace

    CBIT ZONE


    • CBIT-1182: client machines for regression tests
    • CBIT-1336: HW request for N1QL and secondary indexes performance testing
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