Re: memory question

2010-03-26 Thread Jonathan Ellis
ance. > > is that a fair statement? > > > From: Jonathan Ellis [jbel...@gmail.com] > Sent: Thursday, March 25, 2010 8:01 PM > To: user@cassandra.apache.org > Subject: Re: memory question > > Cassandra mmaps your data files which show up as

RE: memory question

2010-03-26 Thread Todd Burruss
Ellis [jbel...@gmail.com] Sent: Thursday, March 25, 2010 8:01 PM To: user@cassandra.apache.org Subject: Re: memory question Cassandra mmaps your data files which show up as RES and SHR. This is normal. c0d1p1 is completely maxed out. Assuming that is your data disk and not your commitlog one, you

Re: memory question

2010-03-25 Thread Jonathan Ellis
Cassandra mmaps your data files which show up as RES and SHR. This is normal. c0d1p1 is completely maxed out. Assuming that is your data disk and not your commitlog one, you need to tell Cassandra to cache more rows (or keys, depending). If you are maxing out your caches and still seeing this t

Re: memory question

2010-03-25 Thread B. Todd Burruss
no compaction. Jonathan Ellis wrote: did you check jmx to see if a compaction is going on? On Mon, Mar 22, 2010 at 5:14 PM, Todd Burruss wrote: after running my cluster for a while performance has become unacceptable, 200+ ms for reads. if running well, i see reads <10ms. when i run iost

Re: memory question

2010-03-24 Thread Jonathan Ellis
did you check jmx to see if a compaction is going on? On Mon, Mar 22, 2010 at 5:14 PM, Todd Burruss wrote: > after running my cluster for a while performance has become unacceptable, > 200+ ms for reads.  if running well, i see reads <10ms.  when i run iostat > the disk is being hammered by reads