Jeff is probably correct. I skimmed over the fact that it's just increasing by one every few minutes so I went on about a different scenario.
On Mon, Jul 3, 2017, at 01:46 PM, Jeff Jirsa wrote: > > > On 2017-07-03 06:55 (-0700), Jean Carlo <jean.jeancar...@gmail.com> > wrote: > > Hello > > > > Lately I am observing that the false positives of one of my nodes are > > increasing in a continous way (1 per 5min) > > > > There's probably one partition that has a false positive entry, and you > read it once every 5 minutes. Bloom filters are probabilistic, false > positives are OK, it just causes a little bit of extra disk IO. > > > Bloom filter false positives: 532 > > Bloom filter false ratio: 0.01449 > > Bloom filter space used: 1.34 MB > > Bloom filter off heap memory used: 1.33 MB > > > > At the same time I can see that the duration of GC has increased also > > > > There is a link between the increasment of the GC and the bloom filter ? > > > > Probably not in any meaningful way (like mentioned above, false positive > causes some extra disk IO to check one extra sstable, but it's not going > to really impact GC in any meaningful way if it's truly a false > positive). > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org > For additional commands, e-mail: user-h...@cassandra.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org For additional commands, e-mail: user-h...@cassandra.apache.org
