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https://issues.apache.org/jira/browse/IGNITE-8974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vyacheslav Koptilin resolved IGNITE-8974.
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Resolution: Won't Fix
This is not actual anymore due to IGNITE-13871, IGNITE-15760
> MVCC TX: Vacuum cleanup version obtaining optimization.
> -------------------------------------------------------
>
> Key: IGNITE-8974
> URL: https://issues.apache.org/jira/browse/IGNITE-8974
> Project: Ignite
> Issue Type: Task
> Components: cache, mvcc
> Reporter: Roman Kondakov
> Priority: Major
> Labels: mvcc_performance
>
> At the moment vacuum process obtains cleanup version as the same way as
> transactions do. It implies some unnecessary complications and even minor
> performance drop due to calculation entire tx snapshot instead of just a
> cleanup version number or sending unnsecessary tx end acks back to the
> coordinator. Possible solutions are:
> * Local caching cleanup version from the last obtained tx snapshot and use
> it in vacuum process. But in this way not all outdated versions could be
> cleaned (i.e. keys updated by this last tx).
> * Implement a special method for calculating cleanup version on the
> coordinator site and Request and Response messages for vacuum runned on
> non-coordinator site.
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