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https://issues.apache.org/jira/browse/HBASE-28176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17789558#comment-17789558
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Hudson commented on HBASE-28176:
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Results for branch master
[build #952 on
builds.a.o|https://ci-hbase.apache.org/job/HBase%20Nightly/job/master/952/]:
(/) *{color:green}+1 overall{color}*
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details (if available):
(/) {color:green}+1 general checks{color}
-- For more information [see general
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/master/952/General_20Nightly_20Build_20Report/]
(/) {color:green}+1 jdk8 hadoop3 checks{color}
-- For more information [see jdk8 (hadoop3)
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/master/952/JDK8_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(/) {color:green}+1 jdk11 hadoop3 checks{color}
-- For more information [see jdk11
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/master/952/JDK11_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(/) {color:green}+1 source release artifact{color}
-- See build output for details.
(/) {color:green}+1 client integration test{color}
> PrefetchExecutor should stop once cache reaches capacity
> --------------------------------------------------------
>
> Key: HBASE-28176
> URL: https://issues.apache.org/jira/browse/HBASE-28176
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 2.6.0, 3.0.0-alpha-4, 4.0.0-alpha-1
> Reporter: Wellington Chevreuil
> Assignee: Wellington Chevreuil
> Priority: Major
> Fix For: 2.6.0, 3.0.0-beta-1, 4.0.0-alpha-1
>
>
> The prefetch executor runs a full scan on regions in the background once
> regions are opened, if the "hbase.rs.prefetchblocksonopen" property is set to
> true. However, if the store file size is much larger than the cache capacity,
> we should interrupt the prefetch once it has reached the cache capacity,
> otherwise it would just be triggering evictions of little value, since we
> don't have any sense of block priority at that point. It's better to stop the
> read, and let client reads cause the eviction of LFU blocks and cache the
> most accessed blocks.
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