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https://issues.apache.org/jira/browse/HBASE-27964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17740578#comment-17740578
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Zheng Wang commented on HBASE-27964:
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Here is a test.
I write data to a cluster which has two regionServers, and limit the compaction
throughput, the node9(10.0.0.9) apply the patch and disable delayed selection,
we can see the store_file_count and store_file_size grows similar, but the
compaction_queue_length has big difference, the node23(10.0.0.23) obviously
incorrect.
!image-2023-07-06-19-51-21-354.png|width=503,height=192!
!image-2023-07-06-20-00-21-587.png|width=502,height=190!
!image-2023-07-06-20-00-41-933.png|width=501,height=192!
> Adds a switch for compaction's delay selection feature
> ------------------------------------------------------
>
> Key: HBASE-27964
> URL: https://issues.apache.org/jira/browse/HBASE-27964
> Project: HBase
> Issue Type: Improvement
> Components: Compaction
> Reporter: Zheng Wang
> Assignee: Zheng Wang
> Priority: Major
> Attachments: image-2023-07-06-19-51-21-354.png,
> image-2023-07-06-20-00-21-587.png, image-2023-07-06-20-00-41-933.png
>
>
> When the compact pressure is high, delayed selection can cause the metric of
> compact queue length to continuously increase incorrectly. We should provide
> an option to disable this feature if the user values metric accuracy more.
> See HBASE-26987 for more detail.
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