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Vladimir Ozerov updated IGNITE-8974: ------------------------------------ Component/s: (was: sql) > MVCC TX: Vacuum cleanup version obtaining optimization. > ------------------------------------------------------- > > Key: IGNITE-8974 > URL: https://issues.apache.org/jira/browse/IGNITE-8974 > Project: Ignite > Issue Type: Improvement > Components: cache, mvcc > Reporter: Roman Kondakov > Priority: Major > > 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 But in this way not all outdated versions could be 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. -- This message was sent by Atlassian JIRA (v7.6.3#76005)