Hi Will,
Thanks - but I am confused about your terminology. You state we are looking
for a memory issue, is this inextricably linked to the execution time? i.e.
could it be the JVM trying to cleanup the stuff in memory prior to the end
of the request?
As I pointed out the exact same code, with the exact same data works faster
on the old 32bit machine. If I can put some logic around this, on the
possible causes and how that relates to the JVM settings, I will perhaps be
able to make some better decisions.
Can you help expand on what we are looking for?
Thanks!
On Wed, Feb 16, 2011 at 4:09 PM, Wil Genovese <wilg...@gmail.com> wrote:
>
> Set min max heap to be equal.
>
> Set gc intervals to 10000
>
> And try again. These are not hard set numbers but in many cases works good
> enough to start figuring out what is really happening.
>
> You should install monitoring package and look for the cause of the memory
> issue. Typically it's unexpected behavior in code. Many times a query
> returning far more results than expected.
>
> Monitor, fix code monitor again, adjust settings as needed.
>
>
>
>
> Wil Genovese
> Sr Web Application Developer / Sys Admin
>
> CFWebtools
>
> On Feb 15, 2011, at 10:48 PM, Duncan <duncan.lox...@gmail.com> wrote:
>
> >
> > Hi Everyone,
> >
> > We have recently put together a new CF server, moving from 32 bit, 4Gb
> RAM
> > Windows over to 64bit, 16Gb RAM Windows.
> >
> > We have pretty much done a default set up, and placed the same set of
> > applications on the new server, and have run in the machine for a bit.
> After
> > a few weeks we have been noticing some cracks appear, and we now have
> some
> > issues that we have narrowed down to the JVM/CF setup.
> >
> > Here is the setup on the old and new boxes:
> >
> > 4GB, Dual Xeon, 32bit windows, jdk1.6.0_13
> >
> >
> >
> > java.args=-server -Xms512m -Xmx1000m -Dsun.io.useCanonCaches=false
> > -Dcoldfusion.fckupload=true -XX:PermSize=128m -XX:MaxPermSize=240m
> > -XX:+UseParallelGC -XX:+HeapDumpOnOutOfMemoryError
> > -Dsun.rmi.dgc.client.gcInterval=150000
> > -Dsun.rmi.dgc.server.gcInterval=150000
> > -Dcoldfusion.rootDir={application.home}/../
> > -Dcoldfusion.libPath={application.home}/../lib
> >
> -Dcoldfusion.classPath={application.home}/../lib/updates,{application.home}/../lib,{application.home}/../gateway/lib/,{application.home}/../wwwroot/WEB-INF/flex/jars,{application.home}/../wwwroot/WEB-INF/cfform/jars
> >
> >
> > Crashed a lot, had out of memory issues once every hour on a good day.
> >
> >
> >
> > www.hairbodyskin.com.au takes 2,781ms (from FusionReactor)
> >
> >
> >
> >
> > 16Gb, Quad Core, 64bit Windows, jdk1.6.0_13
> >
> >
> >
> > java.args=-server ââ¬âXmx8192m -Xms8192m -Dsun.io.useCanonCaches=false
> > -XX:MaxPermSize=1024m -XX:+UseParallelGC -Xbatch
> > -Dcoldfusion.rootDir={application.home}/
> >
> -Djava.security.policy={application.home}/servers/cfusion/cfusion-ear/cfusion-war/WEB-INF/cfusion/lib/coldfusion.policy
> >
> -Djava.security.auth.policy={application.home}/servers/cfusion/cfusion-ear/cfusion-war/WEB-INF/cfusion/lib/neo_jaas.policy
> >
> >
> > Runs great, has no crashes, happily inside memory limits, but runs so
> slow.
> >
> >
> > www.hairbodyskin.com.au takes 10,361ms (from FusionReactor)
> >
> > I must add that this is NOT the only application on this server, there
> are
> > many others, mostly built on the same code base, some older some newer.
> >
> > I would like some advice on how to better adjust my settings - I think
> this
> > should be reasonably for those educated in the art because we are talking
> > (in some cases) a 5x difference in execution speeds. I am thinking:
> >
> > 1) increasing GC interval to 600000
> > 2) fixing max and min perm size to 1024
> > 3) putting xms down to 4096
> >
> > Are these sensible? Any other suggestions?
> >
> > Thanks in advance!
> >
> > --
> > Duncan I Loxton
> > duncan.lox...@gmail.com
> >
> >
> >
>
>
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