the 1GB limit is OS specific, on Solaris for example, and a 32bit VM we
had the limit of -Xmx1850m
on a 64bit VM the limitation should be non existent
Filip
Stephen Caine wrote:
Ayusman,
I have a OS X server, running Tomcat 5.0.19. There are already three
applications running but I will need one more application which is
memory intensive. I wanted to know how can I specify/increase the
memroy requirements for my application or Tomcat application? My new
application may need RAM data of around 800MB - 1.5 GB; given the
condition that the OS X Server Hard Ware is capable of providing this
amount of memory, how do I claim it at Tomcat startup, so that my
application goes smoothly.
Additionally is there any known issues in Tomcat while dealing with
memory intensive applications?
Any inputs will be really helpful.
We use Tomcat 5.5.7 on a Mac Quad Server (4 gigs RAM). Our default
settings are:
-Xms200m -Xmx200m -XX:+MaxFDLimit -server -Djava.awt.headless=true
These work fine except when there are a very large number of
application pages. In this case we use:
-Xms1048m -Xmx1048m -XX:+MaxFDLimit -server -Djava.awt.headless=true
-XX:MaxPermSize=256m
At this point in time, you cannot allocate more than 1 gig to the heap
regardless of whether the machine itself has more RAM. Initially we
thought this would be a hindrance, however experience has shown us
that this limitation has minimal impact.
Stephen Caine
Soft Breeze Systems, LLC
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