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https://issues.apache.org/jira/browse/HBASE-17765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15907520#comment-15907520
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Anastasia Braginsky commented on HBASE-17765:
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Hi [~ram_krish],
Actually I didn't increase the threshold to 30, it was 30 since we turned to
use NONE, BASIC and EAGER memstore types. For now for BASIC we actually never
merge the segments, but we do flatten the youngest segment. Here we make the
threshold configurable because we see it should be actually better to decrease
this number.
> Reviving the merge possibility in the CompactingMemStore
> --------------------------------------------------------
>
> Key: HBASE-17765
> URL: https://issues.apache.org/jira/browse/HBASE-17765
> Project: HBase
> Issue Type: Sub-task
> Reporter: Anastasia Braginsky
> Assignee: Anastasia Braginsky
> Fix For: 2.0.0
>
> Attachments: HBASE-17765-V01.patch
>
>
> According to the new performance results presented in the HBASE-16417 we see
> that the read latency of the 90th percentile of the BASIC policy is too big
> due to the need to traverse through too many segments in the pipeline. In
> this JIRA we correct the bug in the merge sizing calculations and allow
> pipeline size threshold to be a configurable parameter.
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