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Re: G1 before/after GC time graph
Correct!

Otis
Solr & ElasticSearch Support
http://sematext.com/
On Jul 11, 2013 1:18 PM, "Asaf Mesika" <[EMAIL PROTECTED]> wrote:

> This means you can safely run Hadoop and Hbase on jvm 7?
> We were just considering switching in production to java 7.
>
> On Thursday, July 11, 2013, Azuryy Yu wrote:
>
> > Otis,
> >
> > I will do this test, maybe on the end of this month. because I haven't
> big
> > memory server for test now util the end of this month.
> >
> >
> >
> >
> > On Thu, Jul 11, 2013 at 9:38 AM, Otis Gospodnetic <
> > [EMAIL PROTECTED]> wrote:
> >
> > > Hi,
> > >
> > > Probably not any time in the near future.  We could do it, plop SPM in
> > > it and watch, but don't have time for it now.
> > >
> > > If anyone wants to give it a shot and use SPM to capture various
> > > JVM/HBase/server metrics, let me know if help around SPM is needed,
> > > longer trials, or whatever.
> > >
> > > Otis
> > > --
> > > HBase Performance Monitoring -- http://sematext.com/spm
> > >
> > >
> > >
> > > On Wed, Jul 10, 2013 at 5:27 PM, Kevin O'dell <
> [EMAIL PROTECTED]>
> > > wrote:
> > > > Anyway you can test this with a 32GB heap? :)
> > > >
> > > >
> > > > On Wed, Jul 10, 2013 at 5:23 PM, Otis Gospodnetic <
> > > > [EMAIL PROTECTED]> wrote:
> > > >
> > > >> But, very importantly:
> > > >>
> > > >> CPU after changes: https://apps.sematext.com/spm/s/CpZ9aPhL9L
> > > >> Load after changes: https://apps.sematext.com/spm/s/i7f3x6MXdZ
> > > >>
> > > >> So in practical terms, use something like -XX:MaxGCPauseMillis=200
> > > >> -XX:NewRatio=4 to force short GC pauses, but count on having more of
> > > >> them and CPU sweating more.  This gives you smaller pauses, no big
> STW
> > > >> pauses, but be prepared to pay in CPU cycles.
> > > >>
> > > >> HTH
> > > >>
> > > >> Otis
> > > >> --
> > > >> HBase Performance Monitoring -- http://sematext.com/spm
> > > >>
> > > >>
> > > >>
> > > >> On Wed, Jul 10, 2013 at 4:20 PM, Otis Gospodnetic
> > > >> <[EMAIL PROTECTED]> wrote:
> > > >> > Not big in this case - 1800m
> > > >> >
> > > >> > Otis
> > > >> > --
> > > >> > HBase Performance Monitoring -- http://sematext.com/spm
> > > >> >
> > > >> >
> > > >> >
> > > >> > On Wed, Jul 10, 2013 at 3:57 PM, Vladimir Rodionov
> > > >> > <[EMAIL PROTECTED]> wrote:
> > > >> >>
> > > >> >> What is  -Xmx heap size?
> > > >> >>
> > > >> >> Best regards,
> > > >> >> Vladimir Rodionov
> > > >> >> Principal Platform Engineer
> > > >> >> Carrier IQ, www.carrieriq.com
> > > >> >> e-mail: [EMAIL PROTECTED]
> > > >> >>
> > > >> >> ________________________________________
> > > >> >> From: Otis Gospodnetic [[EMAIL PROTECTED]]
> > > >> >> Sent: Wednesday, July 10, 2013 12:00 PM
> > > >> >> To: [EMAIL PROTECTED]
> > > >> >> Subject: G1 before/after GC time graph
> > > >> >>
> > > >> >> Hi,
> > > >> >>
> > > >> >> There was talk of G1 and HBase here over the past few days.  I
> > wanted
> > > >> >> to share a fresh and telling SPM graph showing G1 + some other
> > params
> > > >> >> in action:
> > > >> >>
> > > >> >> Result first: https://apps.sematext.com/spm/s/wN0hKVixxX
> > > >> >>
> > > >> >> This is what we had before:
> > > >> >>   -XX:+HeapDumpOnOutOfMemoryError -XX:+UseG1GC
> > > >> >> -XX:InitiatingHeapOccupancyPercent=35 -XX:G1ReservePercent=25
> > > >> >>
> > > >> >> And then we added:
> > > >> >>
>