Couchbase Server
Performance Status
06/04/2014
KV
MB-11287: Idle server with 30 empty buckets utilizes more than 2000% CPU
MB-11194: Slow and pausing disk persistence
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)
KV
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-10370:
ep-engine deadlock in write-heavy DGM cases
MB-9676:
Dramatically increasing latency of SET operations during rebalance tests
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-11281:
Lack of "swt low" causes long run queues and inconsistent Erlang performanc
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MB-10437: XDCR replication rate drops almost to zero in presence of light write workload on src side
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MB-7907:
Issues when scaling XDCR on single node
Views
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MB-11204: Leaking memory in performance tests with view queries (both memcached and Erlang)
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MB-10273:
View compaction doesn't catch up in basic non-DGM tests with view queries
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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
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MB-11141: SELECT COUNT(*) ... WHERE should avoid memcached operations
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MB-11140: SELECT DISTINCT scans all docs
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MB-11048: Range queries result in thousands of GET operations/sec
BACKLOG
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Multitenancy
- Continuous mobile tests
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MongoDB performance testing
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More "observe" tests
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[SmartOS] + DTrace
CBIT ZONE
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CBIT-1182:
client machines for regression tests
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CBIT-1158:
RAID 10 drives for performance testing
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CBIT-1262:
storage upgrade on "Zeus" (Windows cluster)