Yes, because the cache is not full so there is no pressure to remove old entries.
On Thu, Sep 29, 2011 at 11:52 AM, Sanjeev Kulkarni <sanj...@locomatix.com> wrote: > Hi Thamizh, > Thanks for the answer. > I understand the part about the Key cache capacity being 200000 which is the > default value. > But Key cache size being 99k? Does this represent that cassandra has > allocated 99k for key cache even though the actual keys are far less? > > On Thu, Sep 29, 2011 at 3:47 AM, Thamizh <tceg...@yahoo.co.in> wrote: >> >> please check [default@unknown] help create column family; >> These are default values, until you explicitly mentioned on CF creation. >> >> Regards, >> Thamizhannal >> ________________________________ >> From: Sanjeev Kulkarni <sanj...@locomatix.com> >> To: user@cassandra.apache.org >> Sent: Thursday, 29 September 2011 10:33 AM >> Subject: nodetools cfstats question >> >> Hey guys, >> I'm using a three node cluster running 0.8.6 with rf of 3. Its a freshly >> installed cluster with no upgrade history. >> I have 6 cfs and only one of them is written into. That cf has around one >> thousand keys. A quick key_range_scan verifies this. >> However when I do cfstats, I see the following for this cf. >> Number of Keys (estimate): 5248 >> Key cache capacity: 200000 >> Key cache size: 99329 >> What is the definition of these three output values? Both the Number of >> Keys and Key Cache size are way over what they should be. >> Thanks! >> > > -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com
