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
