Track buffer cache hit rate with mincore
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Key: CASSANDRA-3376
URL: https://issues.apache.org/jira/browse/CASSANDRA-3376
Project: Cassandra
Issue Type: New Feature
Reporter: Jonathan Ellis
Priority: Minor
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?
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