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https://issues.apache.org/jira/browse/HBASE-28303?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wellington Chevreuil updated HBASE-28303:
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Release Note:
This change adds a new configuration property, "hbase.rs.prefetchheapusage",
which specifies a heap usage limit for the prefetch threads to be allowed to
execute. This is to prevent an overhead heap usage by bucket cache mapping
objects when using file or offheap engines.
This value should be defined as a double representing the heap usage
percentage, and it's default set to 1d (100% heap), disabling this feature. For
example, to set an 80% heap usage threshold, set "hbase.rs.prefetchheapusage"
to "0.8" in the RegionServer hbase-site.xml configuration.
> Interrupt cache prefetch thread when a heap usage threshold is reached
> ----------------------------------------------------------------------
>
> Key: HBASE-28303
> URL: https://issues.apache.org/jira/browse/HBASE-28303
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 2.6.0, 2.4.17, 3.0.0-beta-1, 4.0.0-alpha-1, 2.5.7, 2.7.0
> Reporter: Wellington Chevreuil
> Assignee: Wellington Chevreuil
> Priority: Major
> Fix For: 4.0.0-alpha-1
>
>
> Mostly critical when using non heap cache implementations, such as offheap or
> file based. If the cache medium is too large and there are many blocks to be
> cached, it may create a lot of cache index object in the RegionServer heap.
> We should have guardrails to preventing caching from exhausting available
> heap.
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