stack created HBASE-14460:
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Summary: [Perf Regression] Merge of MVCC and SequenceId
(HBASE-HBASE-8763) slowed Increments, CheckAndPuts, batch operations
Key: HBASE-14460
URL: https://issues.apache.org/jira/browse/HBASE-14460
Project: HBase
Issue Type: Bug
Components: Performance
Reporter: stack
Assignee: stack
Priority: Critical
As reported by 鈴木俊裕 up on the mailing list -- see "Performance degradation
between CDH5.3.1(HBase0.98.6) and CDH5.4.5(HBase1.0.0)" -- our unification of
sequenceid and MVCC slows Increments (and other ops) as the mvcc needs to
'catch up' to our current point before we can read the last Increment value
that we need to update.
We can say that our Increment is just done wrong, we should just be writing
Increments and summing on read, but checkAndPut as well as batching operations
have the same issue. Fix.
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