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Jonathan Ellis commented on CASSANDRA-3376: ------------------------------------------- Note that we already did a JNA mincore wrapper for CASSANDRA-1902 (which did not end up getting committed, but the patches are still there). > Track buffer cache hit rate with mincore > ---------------------------------------- > > Key: CASSANDRA-3376 > URL: https://issues.apache.org/jira/browse/CASSANDRA-3376 > Project: Cassandra > Issue Type: New Feature > Reporter: Jonathan Ellis > Priority: Minor > Labels: ponies > > We could use mincore on, say, 1% of reads to be able to report actual buffer > cache hit rate. This would be useful when troubleshooting slow reads, e.g., > are reads to CF X slow because it's hitting disk, or because there are a lot > of tombstones in the row? -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira