Hi,
did this high memory usage caused the problems? OOM crashes, GC pauses? Best regards, Vladimir Yudovin, Winguzone - Hosted Cloud Cassandra Launch your cluster in minutes. ---- On Wed, 26 Oct 2016 21:51:26 -0400Daniel Kleviansky <dan...@kleviansky.com> wrote ---- Before anyone wastes any time replying, I found out that most of these were not being used, and manage to drop certain keyspaces and reduce the count of column families to 158. Thought still a fair number, this seems to have relieved the issue significantly! Hope this helps someone out at some point, otherwise, sorry for the unnecessary emails. ;) Daniel On Thu, Oct 27, 2016 at 11:25 AM, Daniel Kleviansky <dan...@kleviansky.com> wrote: -- Daniel Kleviansky System Engineer & CX Consultant M: +61 (0) 499 103 043 | E: dan...@kleviansky.com | W: http://danielkleviansky.com Hi everyone, Organisation is running Cassandra for Windows v2.2.5 One of our development (non-load testing) clusters has a total of 6 nodes across two DCs, with an RF = 3:3. Each node has a total of 16GB of memory, and no JVM options have been modified. We're seeing what I believe to be unusually high usage of survivor space across all nodes in the cluster. Some sit at a consistently 100% maxed out state, while others are found at about 90%. Initial thoughts is this is linked to high number of keyspaces/column families running on this particular cluster. There is a total of 28 keyspaces and 412 column families. I have no empirical evidence to support this theory, hence me reaching out to the mailing list. Is there any way to verify this theory, and/or discover potential root causes? Please let me know what other information I can provide, and I'll be sure to get it ASAP. Kindest regards, Daniel Kleviansky
