Hey Ted,
I have a grand total of 3 files, each holding a single long!  Could it
really be in gc hell because of this?  I passed in -Xmx256m on the command
line.

Satish

On Tue, Jun 2, 2009 at 12:52 PM, Ted Dunning <ted.dunn...@gmail.com> wrote:

> I have seen this when I was over-loading our zookeeper instance.  When
> total
> data or total number of files gets large, the system can wind up in GC
> almost permanently.  Zookeeper being Zookeeper, it does an amazing job of
> keeping on, but eventually things go bad.
>
> To test if this is your problem, you can do a couple of things.
>
> - first, figure out how many files you have and how much space they take
>
> - second, review how much memory you gave ZK to start.  It looks from what
> you show here that you didn't give it much memory.
>
> - third, turn on verbose GC and see what that says.
>
> - fourth, write back and tell me why I was wrong with this guess so that we
> all get smarter!
>
> On Tue, Jun 2, 2009 at 12:07 PM, Satish Bhatti <cthd2...@gmail.com> wrote:
>
> > I am running a 5 node ZooKeeper cluster and I noticed that one of them
> has
> > very high CPU usage:
> >
> >  PID   USER      PR  NI  VIRT  RES  SHR S   %CPU %MEM    TIME+   COMMAND
> >  6883  infact       22   0   725m  41m  4188 S   95       0.5
> >  5671:54  java
> >
> > It is not "doing anything" application-wise at this point, so I was
> > wondering why the heck it's using up so much CPU!  I have attached a
> jstack
> > logfile to this email.
> >
> > Satish
> >
> >
>
>
> --
> Ted Dunning, CTO
> DeepDyve
>
> 111 West Evelyn Ave. Ste. 202
> Sunnyvale, CA 94086
> http://www.deepdyve.com
> 858-414-0013 (m)
> 408-773-0220 (fax)
>

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