Re: 0.6.5 OOM during high read load

2011-03-21 Thread Dan Retzlaff
Beautiful, thanks. On Sun, Mar 20, 2011 at 4:36 PM, Jonathan Ellis wrote: > 0.7.1+ uses zero-copy reads in mmap'd mode so having 80k references to > the same column is essentially just the reference overhead. > > On Fri, Mar 18, 2011 at 7:11 PM, Dan Retzlaff wrote: > > Dear experts, :) > > Our

Re: 0.6.5 OOM during high read load

2011-03-20 Thread Jonathan Ellis
0.7.1+ uses zero-copy reads in mmap'd mode so having 80k references to the same column is essentially just the reference overhead. On Fri, Mar 18, 2011 at 7:11 PM, Dan Retzlaff wrote: > Dear experts, :) > Our application triggered an OOM error in Cassandra 0.6.5 by reading the > same 1.7MB column

0.6.5 OOM during high read load

2011-03-18 Thread Dan Retzlaff
Dear experts, :) Our application triggered an OOM error in Cassandra 0.6.5 by reading the same 1.7MB column repeatedly (~80k reads). I analyzed the heap dump, and it looks like the column value was queued 5400 times in an OutboundTcpConnection destined for the Cassandra instance that received the