Performance Status

Couchbase Server

Last Wednesday:

Today:

MB-11143: Avg. BgFetcher wait time is 3-4 times higher on a single HDD in 3.0
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-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-11412: memcached memory rapidly grows to OOM during initial XDCR
MB-11382: XDCR: default replicators per bucket is now 16 (earlier: 32)
~~MB-10437:~~ ~~XDCR replication rate drops almost to zero in presence of light write workload on src side~~

MB-11486: Erlang memory usage increases to 50GB in 10 minutes after "unexpected_binary", node obviously fails afterwards
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-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-11474: 50% regression in KV rebalance

MB-11405: ~2400% CPU consumption by memcached during ongoing workload with 5 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-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-9825: Rebalance exited with reason bad_replicas