On Tue, Jul 24, 2018 at 4:04 AM, Dennis Lovely <d...@aegisco.com> wrote: > you define the max size of your heap (-Xmx), but you do not define the max > size of your offheap (MaxMetaspaceSize for jdk 8, PermSize for jdk7), so you > could occupy all of the memory on the instance.
Yes I think we should set up a MaxMetaspaceSize. I am still going to try to find out why the ram is being used. > you should also take into account that the memory size per stack (Xss) is > -ontop- > of what you define for the heap, and offheap, so number of spawned threads > could be a culprit as well, if you tune your offheap size and keep seeing the > same > trouble. id figure out approximately how many thread stacks are getting > created, > times that by 256k, add that to your heap size, and subtract that number from > the total > amount of memory available to the host to come to a proper offheap size. I have checked the amount of spawned threads (visible with `nodetool tpstats` or `ps -T -p <pid>`) and it's too low to be the cause of all the memory consumption. I have about 650 threads so it's less than 1GB memory used. Thank you for the suggestions Dennis. --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org For additional commands, e-mail: user-h...@cassandra.apache.org
