Reid Chan created HBASE-24578:
---------------------------------
Summary: [WAL] Add a parameter to config RingBufferEventHandler's
SyncFuture count
Key: HBASE-24578
URL: https://issues.apache.org/jira/browse/HBASE-24578
Project: HBase
Issue Type: Improvement
Reporter: Reid Chan
The current value is the value of {{hbase.regionserver.handler.count}}, which
works good in default wal provider --- one WAL per regionserver.
When I tried to use WAL group provider, either by group or wal per region, the
default value was bad. If rs has 100 regions I use wal per region strategy,
then rs will allocate 100 * SyncFuture[$hbase.regionserver.handler.count] array
{code}
int maxHandlersCount = conf.getInt(HConstants.REGION_SERVER_HANDLER_COUNT, 200);
this.ringBufferEventHandler = new RingBufferEventHandler(
conf.getInt("hbase.regionserver.hlog.syncer.count", 5),
maxHandlersCount);
...
----
RingBufferEventHandler(final int syncRunnerCount, final int maxHandlersCount) {
this.syncFutures = new SyncFuture[maxHandlersCount];
...
}
{code}
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