Nicolas Liochon created HBASE-11226: ---------------------------------------
Summary: Document and increase the default value for hbase.hstore.flusher.count Key: HBASE-11226 URL: https://issues.apache.org/jira/browse/HBASE-11226 Project: HBase Issue Type: Bug Components: regionserver Affects Versions: 0.98.2, 0.99.0 Reporter: Nicolas Liochon Assignee: Nicolas Liochon Fix For: 0.99.0, 0.98.3 HBASE-6466 add the possibility to have multiple threads for the flusher. The default value is 1, but this should be incremented to 2 reasons: - I've observed that the flush of a region can be delayed because another is in progress. During a write load, this leads to an increased latency because the memstore size increases and then block the client - if, by accident, a flusher hits a slow or bad datanode, all the flush will have to wait until the timeouts expires. With 2 or more flushers and some luck the other regions will be flushed by the second thread. Lastly this setting is important enough to be documented in the standard hbase site imho. I think it's important enough to go in the .98 branch as well There will be an impact: as the flush won't be queued (or less queued) we may have more compactions... -- This message was sent by Atlassian JIRA (v6.2#6252)