[ https://issues.apache.org/jira/browse/IMPALA-10545?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michael Smith reassigned IMPALA-10545: -------------------------------------- Assignee: Michael Smith > Tune data_cache_write_concurrency based on the type of IO device > ---------------------------------------------------------------- > > Key: IMPALA-10545 > URL: https://issues.apache.org/jira/browse/IMPALA-10545 > Project: IMPALA > Issue Type: Improvement > Components: Backend > Affects Versions: Impala 4.0.0 > Reporter: Joe McDonnell > Assignee: Michael Smith > Priority: Major > Labels: ramp-up > > The data cache limits concurrency writes to the cache to avoid overwhelming > the underlying IO device. This is controlled by the > data_cache_write_concurrency flags and defaults to 1. For SSDs, we should be > able to increase this to allow more concurrent writes to the data cache. This > would allow the data cache to warm up faster and stay more up to date. > One option is to detect the underlying IO device (similar to how we do this > for other parts of Disk IO Mgr) and tune this parameter higher for SSDs. -- This message was sent by Atlassian Jira (v8.20.7#820007) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org For additional commands, e-mail: issues-all-h...@impala.apache.org