If you want, you can try to force the GC through Jconsole. Memory->Perform GC.
It theoretically triggers a full GC and when it will happen depends on the JVM -Wei ----- Original Message ----- From: "Robert Coli" <rc...@eventbrite.com> To: user@cassandra.apache.org Sent: Tuesday, June 18, 2013 10:43:13 AM Subject: Re: Heap is not released and streaming hangs at 0% On Tue, Jun 18, 2013 at 10:33 AM, srmore <comom...@gmail.com> wrote: > But then shouldn't JVM C G it eventually ? I can still see Cassandra alive > and kicking but looks like the heap is locked up even after the traffic is > long stopped. No, when GC system fails this hard it is often a permanent failure which requires a restart of the JVM. > nodetool -h localhost flush didn't do much good. This adds support to the idea that your heap is too full, and not full of memtables. You could try nodetool -h localhost invalidatekeycache, but that probably will not free enough memory to help you. =Rob
