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https://issues.apache.org/jira/browse/ASTERIXDB-3315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17788952#comment-17788952
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ASF subversion and git services commented on ASTERIXDB-3315:
------------------------------------------------------------
Commit b05bc685e101893abd22af0d4c086ae97b977bd4 in asterixdb's branch
refs/heads/master from Ian Maxon
[ https://gitbox.apache.org/repos/asf?p=asterixdb.git;h=b05bc685e1 ]
[ASTERIXDB-3315][RT] Exclude compression from hit ratio
- user model changes: no
- storage format changes: no
- interface changes: no
Details:
Add a new signature of pin() to allow a caller to skip
counts used in metrics from being collected. This is to
stop compression from inflating the bufferCacheHitRatio
metric.
Change-Id: I568a2df4594bdde19932ba72362c9c61291b9183
Reviewed-on: https://asterix-gerrit.ics.uci.edu/c/asterixdb/+/17969
Integration-Tests: Jenkins <[email protected]>
Reviewed-by: Wail Alkowaileet <[email protected]>
Tested-by: Jenkins <[email protected]>
> Exclude compression-related pins from metrics
> ---------------------------------------------
>
> Key: ASTERIXDB-3315
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-3315
> Project: Apache AsterixDB
> Issue Type: Bug
> Reporter: Ian Maxon
> Assignee: Ian Maxon
> Priority: Major
>
> The compression uses the buffercache for the LAF and other things. These pins
> are counted in the buffercacheHitRatio metric. Including them leads to a
> misleadingly high ratio for the query because the LAF is hot and almost
> always entirely in cache. These should be excluded from this calculation.
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