> From: "Wendy Smoak" <[EMAIL PROTECTED]> > Sent: Wednesday, May 11, 2005 10:42 AM Subject: Memory for JSP Compliation in 4.1
> Will adding > JAVA_OPTS=-Xmx128M > to catalina.sh help with running out of memory during JSP compilation in > 4.1? > > The notes in catalina.sh say that these options will be used when the > "start" "stop" or "run" command is executed, but from the Jasper config > page, I see that Tomcat will 'fork' another JVM in order to compile JSPs. > Does this new JVM "inherit" the memory settings of the original, or is there > some other way to increase its memory? First off, no, the -Xmx option will do nothing in terms of affecting the memory for a JSP compile if fork is true. If fork is false, then the -Xmx options that you ran your original Tomcat with WILL affect the heap size for the compiler, but that assumes the Sun compiler. I don't know if HP's JVM is using Suns compiler or not (it may be). See, the Sun compiler is just a java class that can run like any other class. But if HPs JVM doesn't have the Sun compiler class available, then the JSP compiler is simply going to call javac, and that's going to fork no matter what your Jasper setting. Also note that at some point in the 4.1 version, the JSP/Sun compiler combo had a memory leak. I don't know if that was Tomcat, Jasper, or Suns compiler that was at fault, or whether your version has it fixed, but that was an early impetus for forking to compile JSPs in the first place, to punt around the memory leak. Um...how big is the JSP that you're compiling? Is there perhaps a way to make it smaller? Perhaps including some of the static content at runtime rather than compile? (I'm trying to fathom a big enough JSP that would blow up the compiler, but who knows.) Have you considered looking at precompiling the JSPs (or at least the few nasty ones that are grenading your server)? Then you'd perhaps have more control over memory for the compile that the standard Jasper engine doesn't expose to you. Regards, Will Hartung ([EMAIL PROTECTED]) --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
