On 05/10/2011 02:12 PM, Peter Schuller wrote: >> That reminds me, my false positive ration is stuck at 1.0, so I guess >> bloom filters aren't doing a lot for me. > > That sounds unlikely unless you're hitting some edge case like reading > a particular row that happened to be a collision, and only that row. > This is from JMX stats on the column family store? >
(From jmx) I also see BloomFilterFalseRatio stuck at 1.0 on my production nodes. The only values that RecentBloomFilterFalseRatio had over the past several minutes were 0.0 and 1.0. While I can't prove that isn't accurate, it is very suspicions. The code looked reasonable until I got to SSTableReader, which was too complicated to just glance through.
