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David Capwell updated CASSANDRA-15452: -------------------------------------- Change Category: Performance Complexity: Normal Component/s: Local/Compaction Legacy/Local Write-Read Paths Status: Open (was: Triage Needed) > investigate using POSIX_FADV_WILLNEED on compaction > --------------------------------------------------- > > Key: CASSANDRA-15452 > URL: https://issues.apache.org/jira/browse/CASSANDRA-15452 > Project: Cassandra > Issue Type: Improvement > Components: Legacy/Local Write-Read Paths, Local/Compaction > Reporter: Jon Haddad > Priority: Normal > > On read heavy workloads Cassandra performs much better when using a low read > ahead setting. In my tests I've seen an 5x improvement in throughput and > more than a 50% reduction in latency. However, I've also observed that it > can have a negative impact on compaction throughput. > We should investigate using the POSIX_FADV_WILLNEED on files we're compacting > to see if we can improve performance and reduce page faults. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org