Re: BufferPool always allocates on heap?

Sure, if your analysis is correct we can either add the comment to cassandray.yaml or NEWS.txt, or both. Could you leave a comment with your analysis and suggestion to CASSANDRA-11993? When Branimir is back from holiday he can probably confirm easily if that's the case. On Wed, Jun 22, 2016 at

Re: BufferPool always allocates on heap?

Hi Stefania, Thanks for the explanation - I think it may be more likely I'm hitting MEMORY_USAGE_THRESHOLD (file_cache_size_in_mb, which is 512mb by default), as the table itself is very large (a couple TB over 12 nodes). In that case, due to the changes outlined

Re: Disabling all caching in Cassandra

[Moving to users list] The most important thing will be to reduce your JVM heap size. Cassandra will automatically reduce pool sizes as you do that. Disabling key cache and row cache will help you get that even smaller. On Tue, Jun 21, 2016 at 5:21 AM, Sumit Anvekar

Re: Disabling all caching in Cassandra

What tool are you using to determine memory usage? What OS are you using? How much heap are you allocating to the JVM? Cheers, Christos Kalantzis Sent from my mobile On Jun 22, 2016 7:01 AM, "Sumit Anvekar" wrote: > Hello, > We are using Cassandra 3.0.7 version and

Want to contribute to the Cassandra wiki

Hi there, I would like to contribute to the wiki. My wiki user name: SuraiyaKhan Thanks. Suraiya

Re: Want to contribute to the Cassandra wiki

Sorry the user name is: Suraiya Khan (ther is a space in between) Thanks. On Wed, Jun 22, 2016 at 12:43 AM, Suraiya Khan wrote: > Hi there, > I would like to contribute to the wiki. > > My wiki user name: SuraiyaKhan > > Thanks. > > Suraiya >

Disabling all caching in Cassandra

Hello, We are using Cassandra 3.0.7 version and off late we see that 90% of memory is occupied even though hard-drive is hardly used. We have a cluster of 5 nodes with 15 GB memory, 4 cores, 200 GB SSD. We tried all kind of configurations through both YAML as well as table based properties but

Re: BufferPool always allocates on heap?

Hi Nimi I am not familiar with how CASSANDRA-5863 uses the buffer pool yet, but I do know how the buffer pool works It has a local pool, which is thread local, and takes chunks from a global pool. These are allocated off heap and aligned to the page cache boundaries, see here