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.
