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HBase, mail # user - Multiple regionservers on a single node


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Re: 答复: Multiple regionservers on a single node
Adrien Mogenet 2012-12-10, 22:21
On Fri, Dec 7, 2012 at 10:58 AM, 谢良 <[EMAIL PROTECTED]> wrote:

> Emm, have you tried to tune your GC deeply? please provide the exactly VM
> options and jdk version and GC logs..
> In our test cluster this week, i managed to reduce the longest STW from
> 22+ seconds(Xmx20G) to 1.1s(Xmx48G) under a very heavy YCSB stress
> long-term-testing.
>

Do you have any further explanation on your specific case ? Looks
interesting :-)
>
> Also it would be better to ask help from hotspot-gc-use/hotspot-gc-dev
> mail list:)
> And the G1GC within jdk7u4+ is a potential solution for large-heap senario
> as well:)
> ________________________________________
> > On Mon, Dec 3, 2012 at 3:39 PM, Ishan Chhabra <[EMAIL PROTECTED]
> > >wrote:
> >
> > > Hi,
> > > Has anybody tried to run multiple RegionServers on a single physical
> > > node? Are there deep technical issues or minor impediments that would
> > > hinder this?
> > >
> > > We are trying to do this because we are facing a lot of GC pauses on
> the
> > > large heap sizes (~70G) that we are using, which leads to a lot of
> > timeouts
> > > in our latency critical application. More processes with smaller heaps
> > > would help in mitigating this issue.
> > >
> > > Any experience or thoughts on this would help.
> > > Thanks!
> > >
> > > --
> > > *Ishan Chhabra *| Rocket Scientist | Rocketfuel Inc. | *m *650 556
> 6803
> > >
> >
> >
> >
> > --
> >
> > Robert Dyer
> > [EMAIL PROTECTED]
> >
>

--
Adrien Mogenet
06.59.16.64.22
http://www.mogenet.me