Thanks Jonathan
On Thu, Aug 4, 2011 at 7:44 PM, Jonathan Ellis <jbel...@gmail.com> wrote: > If you didn't GC post-flush then it's just leftovers. > > An "empty" Cassandra (nothing in memtables or cache) will use 5-10MB of heap. > > On Thu, Aug 4, 2011 at 9:38 PM, Yang <teddyyyy...@gmail.com> wrote: >> I ran my cassandra cluster on one node, inserted about 500000 rows, >> each about 400 bytes, then the heap went up to 800MB, and constantly >> goes into full GC. I guessed that the memtable was probably taking a >> lot of space, so I did a node tool flush, so that >> all memtable are changed to 0. after this, the heap came down a bit, to >> 500MB. >> >> but I thought it should be close to 0 right after the flush?? or else >> what is taking up the space? >> I'm still trying to look at the hprof file to figure out, but it seems >> difficult too >> >> >> Thanks >> Yang >> > > > > -- > Jonathan Ellis > Project Chair, Apache Cassandra > co-founder of DataStax, the source for professional Cassandra support > http://www.datastax.com >
