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https://issues.apache.org/jira/browse/OPENJPA-2950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18128501#comment-18128501
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ASF subversion and git services commented on OPENJPA-2950:
----------------------------------------------------------

Commit a525594b01ed2e1d7075464beea2b1859dcbe95d in openjpa's branch 
refs/heads/OPENJPA-2951 from Paulo Cristovão de Araújo Silva Filho
[ https://gitbox.apache.org/repos/asf?p=openjpa.git;h=a525594b0 ]

Merge pull request #215 from apache/OPENJPA-2950

[OPENJPA-2950] Flush before a query for the access path, not for the whole 
context

> Broadened auto-flush before every query hurts perf
> --------------------------------------------------
>
>                 Key: OPENJPA-2950
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-2950
>             Project: OpenJPA
>          Issue Type: Sub-task
>          Components: jpa
>    Affects Versions: 4.2.0
>            Reporter: Maxim Solodovnik
>            Priority: Major
>             Fix For: 4.2.0
>
>
> Discussion link: 
> https://github.com/apache/openjpa/pull/144#discussion_r3682999345
> **(medium)** With FLUSH_TRUE (default FlushModeType.AUTO) this now flushes 
> before every query as soon as anything in the context is dirty, and the 
> `flush == FLUSH_TRUE` addition at line 1033 also overrides the IgnoreChanges 
> setting. That defeats the access-path optimization and can be a real perf 
> regression in write-heavy transactions - can the broadened check be limited 
> to types related to the query access path, or guarded by a compatibility flag?



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