<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Hi Shyam,<div><br></div><div>You’ve already asked this question on my “friends of jClarity” list and I think you’ve gotten some excellent advice there from Charlie, Gil and a few others who are well regarded experts on this subject. I’d start with that advice first.</div><div><br></div><div>Kind regards,</div><div>Kirk Pepperdine</div><div><br><div><div>On Jan 5, 2015, at 11:19 AM, megha shyam Jakkireddy <<a href="mailto:shyam21@gmail.com">shyam21@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Hi</div>
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<div><p style="MARGIN:0in 0in 10pt" class="MsoNormal"><span style="LINE-HEIGHT:115%;FONT-FAMILY:'Arial','sans-serif';COLOR:#222222;FONT-SIZE:9pt">Recently we have done some G1 Tuning. I've added a logfile. Could</span><span style="LINE-HEIGHT:115%;FONT-FAMILY:'Arial','sans-serif';COLOR:#222222;FONT-SIZE:9pt"> </span><span style="LINE-HEIGHT:115%;FONT-FAMILY:'Arial','sans-serif';COLOR:#222222;FONT-SIZE:9pt">somebody explain and let me know your thoughts to make it optimal. There were no full GC's observed, Heap adaptation looks good and however there were long pause times at the initial hours. And there were premature promotions as well<br><br>Additional to the logging, we are using the below G1 parameters..</span></p><p style="MARGIN:0in 0in 10pt" class="MsoNormal"><span style="LINE-HEIGHT:115%;FONT-FAMILY:'Arial','sans-serif';COLOR:#222222;FONT-SIZE:9pt">-d64 -server -Xms6g -Xmx6g -XX:PermSize=2g -XX:MaxPermSize=2g -XX:+HeapDumpOnOutOfMemoryError  -XX+DisableExplicitGC -XX:+UseG1GC -XX:MaxGCPauseMillis=2000 -XX:InitiatingHeapOccupancyPercent=70 -XX:ConcGCThreads=12 -XX:G1ReservePercent=15 -XX:1HeapRegionSize=32m -XX:-UseBiasedLocking -XX:LargePageSizeInBytes=256m -XX:-UseThreadPriorities -XX:ParallelGCThreads=12 -XX:SoftRefLRUPolicyMSPerMB=1 -XX:+ParallelRefProcEnabled "</span></p><p style="MARGIN:0in 0in 10pt" class="MsoNormal"><span style="LINE-HEIGHT:115%;FONT-FAMILY:'Arial','sans-serif';COLOR:#222222;FONT-SIZE:9pt">We are using JDK 1.7.0_45.</span></p><p style="MARGIN:0in 0in 10pt" class="MsoNormal"><span style="LINE-HEIGHT:115%;FONT-FAMILY:'Arial','sans-serif';COLOR:#222222;FONT-SIZE:9pt">Regards</span></p><div style="margin: 0in 0in 10pt;"><span style="LINE-HEIGHT:115%;FONT-FAMILY:'Arial','sans-serif';COLOR:#222222;FONT-SIZE:9pt"></span> <br class="webkit-block-placeholder"></div></div>
<span><G1GC.TXT></span></blockquote></div><br></div></body></html>