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Jeff Jirsa commented on CASSANDRA-12922: ---------------------------------------- [~krishnasun] are you still interested in writing the unit test? > Bloom filter miss counts are not measured correctly > --------------------------------------------------- > > Key: CASSANDRA-12922 > URL: https://issues.apache.org/jira/browse/CASSANDRA-12922 > Project: Cassandra > Issue Type: Bug > Components: Local Write-Read Paths > Reporter: Branimir Lambov > Assignee: Sundar Srinivasan > Labels: lhf > Fix For: 4.x > > Attachments: 12922-trunk.txt > > > Bloom filter hits and misses are evaluated incorrectly in > {{BigTableReader.getPosition}}: we properly record hits, but not misses. In > particular, if we don't find a match for a key in the index, which is where > almost all non-matches will be rejected, [we don't record a bloom filter > false > positive|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/io/sstable/format/big/BigTableReader.java#L228]. > This leads to very misleading output from e.g. {{nodetool tablestats}}. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org