[OTDev] OpenAM performance
Vedrin Jeliazkov vedrin.jeliazkov at gmail.comMon Jul 4 10:45:27 CEST 2011
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Hi again, On 4 July 2011 11:33, Vedrin Jeliazkov <vedrin.jeliazkov at gmail.com> wrote: > PS: Currently I have 4 GB of RAM allocated to OpenDJ with half of it > dedicated to db cache, another 2 GB to the Tomcat instance hosting > OpenAM, Policy and Ambit2, and yet another 1 GB to the MySQL instance > -- all running on the same server which has 2 processors with a total > of 8 CPU cores, running at 2.67 GHz. However it has a rather slow > (outdated) memory bus, so I'm sure the figures could be improved quite > a lot by using more recent hardware. I've doubled the amount of RAM dedicated to OpenDJ at 10:55 AM (CEST) from 2 to 4 GB, when I noticed that its JVM was spending quite some time in performing frenetic garbage collection activities. This has immediately reduced the latency and stopped the increase as can be seen here: http://ambit.uni-plovdiv.bg/cgi-bin/smokeping.cgi?displaymode=n;start=2011-07-04%2003:38;end=now;target=IDEA-DEV.AA.TestWorkflow-1a So basically, for holding circa 20K policies you need > 2 GB RAM just for the OpenDJ server. Kind regards, Vedrin
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