If RF=2 and CL= QUORUM, you're getting no benefit from replication. When a node is in GC it stops everything. Set RF=3, so when one node is busy the cluster will still work.

On Tue, Mar 8, 2011 at 11:46 AM, ruslan usifov <ruslan.usifov@gmail.com> wrote:

2011/3/8 Chris Goffinet <cg@chrisgoffinet.com>
How large are your SSTables on disk? My thought was because you have so many on disk, we have to store the bloom filter + every 128 keys from index in memory.

 But as I understand store in memory happens only when read happens, i do only inserts. And i think that memory doesn't problem, because heap allocations looks like saw (in max Heap allocations get about 5,5 GB then they reduce to 2GB)

Also when i increase Heap Size to 7GB, situation stay mach better, but nodes frozen still happens, and in gc.log I steel see:

Total time for which application threads were stopped: 20.0686307 seconds

lines (right not so often, like before)