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 < otis.gospodne...@gmail.com> 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 <kevin.od...@cloudera.com> > wrote: > > Anyway you can test this with a 32GB heap? :) > > > > > > On Wed, Jul 10, 2013 at 5:23 PM, Otis Gospodnetic < > > otis.gospodne...@gmail.com> 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 > >> <otis.gospodne...@gmail.com> 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 > >> > <vrodio...@carrieriq.com> wrote: > >> >> > >> >> What is -Xmx heap size? > >> >> > >> >> Best regards, > >> >> Vladimir Rodionov > >> >> Principal Platform Engineer > >> >> Carrier IQ, www.carrieriq.com > >> >> e-mail: vrodio...@carrieriq.com > >> >> > >> >> ________________________________________ > >> >> From: Otis Gospodnetic [otis.gospodne...@gmail.com] > >> >> Sent: Wednesday, July 10, 2013 12:00 PM > >> >> To: user@hbase.apache.org > >> >> 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: > >> >> -XX:MaxGCPauseMillis=200 -XX:NewRatio=4 > >> >> > >> >> I hope this helps. > >> >> > >> >> Otis > >> >> -- > >> >> HBase Performance Monitoring -- http://sematext.com/spm > >> >> > >> >> Confidentiality Notice: The information contained in this message, > >> including any attachments hereto, may be confidential and is intended > to be > >> read only by the individual or entity to whom this message is > addressed. If > >> the reader of this message is not the intended recipient or an agent or > >> designee of the intended recipient, please note that any review, use, > >> disclosure or distribution of this message or its attachments, in any > form, > >> is strictly prohibited. If you have received this message in error, > please > >> immediately notify the sender and/or notificati...@carrieriq.com and > >> delete or destroy any copy of this message and its attachments. > >> > > > > > > > > -- > > Kevin O'Dell > > Systems Engineer, Cloudera >
