> What I would like to know is how to detect this sort of shortage?
I think it would be a trivial patch to have the regionserver log a
warning if all handlers are busy. Without such a patch, a spike in
RPC latencies could be observed, I expect.
Also, if you are using THBase, unfortunately, deadlock:
https://issues.apache.org/jira/browse/HBASE-1910
> I also have the feeling we need this sort of indicators
> as metrics to the various servers so that the max and current can
> be graphed.
+1
- Andy
----- Original Message ----
> From: Lars George <[email protected]>
> To: [email protected]
> Sent: Sun, January 17, 2010 10:17:08 AM
> Subject: Re: [jira] Resolved: (HBASE-2133) Increase default number of client
> handlers
>
> Hi Andrew,
>
> I have it at 30. What I would like to know is how to detect this sort
> of shortage? I also have the feeling we need this sort of indicators
> as metrics to the various servers so that the max and current can be
> graphed. What do you think?
>
> Thanks,
> Lars
>
> On Sat, Jan 16, 2010 at 2:02 AM, Andrew Purtell (JIRA) wrote:
> >
> > Andrew Purtell resolved HBASE-2133.
> > -----------------------------------
> >
> > Resolution: Fixed
> > Hadoop Flags: [Reviewed]
> >
> > Committed following change to trunk and 0.20 branch:
> > \\
> > {noformat}
> > --- conf/hbase-default.xml (revision 899849)
> > +++ conf/hbase-default.xml (working copy)
> > @@ -153,10 +153,10 @@
> >
> >
> > hbase.regionserver.handler.count
> > - 10
> > + 25
> > Count of RPC Server instances spun up on RegionServers
> > Same property is used by the HMaster for count of master handlers.
> > - Default is 10.
> > + Default is 25.
> >
> >
> >
> > {noformat}
