RE: Cassandra using a ton of native memory

2017-11-07 Thread Austin Sharp
To: user <user@cassandra.apache.org> Subject: Re: Cassandra using a ton of native memory 8Gb of RAM being a recommended production setting for most of the workload out there. Having only 16Gb of RAM, and because Cassandra is relying a lot on system page cache, there should be no surprise tha

Re: Cassandra using a ton of native memory

2017-11-03 Thread DuyHai Doan
8Gb of RAM being a recommended production setting for most of the workload out there. Having only 16Gb of RAM, and because Cassandra is relying a lot on system page cache, there should be no surprise that your 16Gb being eaten up. On Fri, Nov 3, 2017 at 5:40 PM, Austin Sharp

RE: Cassandra using a ton of native memory

2017-11-03 Thread Austin Sharp
I've investigated further. It appears that the performance issues are because Cassandra's memory-mapped files (*.db files) fill up the physical memory and start being swapped to disk. Is this related to recommendations to disable swapping on a machine where Cassandra is installed? Should I