Re: KeysCached - clarification and recommendations on settings

The lack of swearing did seem odd. AaronOn 19 Oct, 2010,at 12:41 PM, Brandon Williams wrote:On Mon, Oct 18, 2010 at 3:21 PM, Aaron Morton wrote: Also have a read of this slide deck from Ben Black, caches are talked about from slide 35 onhttp://www.slideshare.net/driftx/c

Re: KeysCached - clarification and recommendations on settings

On Mon, Oct 18, 2010 at 3:21 PM, Aaron Morton wrote: > Also have a read of this slide deck from Ben Black, caches are talked about > from slide 35 on > > http://www.slideshare.net/driftx/cassandra-summit-2010-performance-tuning > > There is also a video linked here > http://www.riptano.com/blog/sl

Re: KeysCached - clarification and recommendations on settings

> Is your entire keyset active? If not set a sane starting point (default for > key cache is 200,000 http://wiki.apache.org/cassandra/StorageConfiguration ) >  and see what the cache hit's are like. How many keys do you have? What > was your hit rate with 100% key cache? Also, keep in mind that th

Re: KeysCached - clarification and recommendations on settings

Also have a read of this slide deck from Ben Black, caches are talked about from slide 35 onhttp://www.slideshare.net/driftx/cassandra-summit-2010-performance-tuningThere is also a video linked here http://www.riptano.com/blog/slides-and-videos-cassandra-summit-2010AaronOn 19 Oct, 2010,at 09:10 AM,

Re: KeysCached - clarification and recommendations on settings

AFAIK the caches do not expire entries under memory pressure, they just hold the number of entries you specify or are unbound in the case of 100%. The caches is based on the ConcurrentLinkedHashMap (http://code.google.com/p/concurrentlinkedhashmap/) and uses the SecondChance eviction policy. " to k

KeysCached - clarification and recommendations on settings

Greetings, I would like to check my understanding is accurate on how KeysCached is understood by Cassandra (0.6.5), and then get some suggestions on settings / OS FS cache interplay. First - my initial understanding was that if you set KeysCached to 100%, Cassandra would do a best effort to