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https://issues.apache.org/jira/browse/HBASE-12335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14182324#comment-14182324
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Nick Dimiduk commented on HBASE-12335:
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It *should* also be the case that the average of the 99.9pct latency should be
lower with this feature enabled. I'm not seeing this consistently, at least
with a cluster of 3 RS's with a region replica factor of 3.
> IntegrationTestRegionReplicaPerf is flakey
> ------------------------------------------
>
> Key: HBASE-12335
> URL: https://issues.apache.org/jira/browse/HBASE-12335
> Project: HBase
> Issue Type: Test
> Components: test
> Reporter: Nick Dimiduk
>
> I find that this test often fails; the assertion that running with read
> replicas should complete faster than without is usually false. I need to
> investigate further as to why this is the case and how we should tune it.
> In the mean time, I'd like to change the test to assert instead on the
> average of the stdev across all the test runs in each category. Meaning,
> enabling this feature should reduce the overall latency variance experienced
> by the client.
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