Couchbase Server

Performance Status

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)
MB-10437: XDCR replication rate drops almost to zero in presence of light write workload on src side

MB-11464: Initial indexing of 20M docs gets stuck
MB-11461: 2x regression in latency of stale=update_after queries
MB-11387: Latency of stale=false queries easily reaches 1 minute and more (moderate workloads)
MB-11386: Latency of stale=false queries is 50% higher in 3.0 (light workloads)
MB-11384: Erlang memory usage in cases with views is 4x higher than in CBEE 2.5.1
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

MB-11405: ~2400% CPU consumption by memcached during ongoing workload with 5 buckets

MB-11378: Cluster gets stuck in warmup state after re-creation of empty buckets

MB-11363: Rebalance after failover (delta recovery mode) fails at the early beginning

MB-11347: mem_used stat differs from memory usage reported by tcmalloc and OS

MB-11323: Rebalance is 2-3 times slower due to actions not related to backfilling or persistence

MB-11287: Idle server with 30 empty buckets utilizes more than 2000% CPU

MB-11143: Avg. BgFetcher wait time is still 5-6 times higher in 3.0 (on slow HDD)

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.

MB-10679: It takes almost 10 minutes to stop Couchbase service in setup with 10 empty buckets

MB-9676: Dramatically increasing latency of SET operations during rebalance tests

MB-10191: CouchDB crashed due to 'Cannot allocate 467078560 bytes of memory (of type "heap").'

MB-9825: Rebalance exited with reason bad_replicas

By Pavel Paulau