Hi, My problem isin't javac memory leakes. Due to the apache/tomcat documentation I was aware of this an setup jikes as my jsp compiler. I'm also using JDK 1.4.1 so the javac issues should be solved, nonetheless. The main problem is as follows: 1. Every article & every page in general is a jsp page 2. All the pages are generated by a legacy CMS-System (imperia) and I can't change the structure of it's works. 3. Every jsp page, once loaded, consumes memory, since the class remains loaded. 4. We have 1000s of pages , every day some 200-300 new, so memory use increases.
Conclusion: The way we use jsp's for a cms is faulty. But I can't do anything about this. Increasing permSize of the JVM helps a lot. Maybe it would be a good idea to include some hints about -XX:MaxPermSize and XX:PermSize into the documentation because it really helps lessen the problems. But: Is there any generic way to get a stable tomcat with huge number of jsp's ? Thanks for all ya feedback & llap + happy new year... julian ----- Original Message ----- From: "Remy Maucherat" <[EMAIL PROTECTED]> To: "Tomcat Users List" <[EMAIL PROTECTED]> Sent: Monday, December 30, 2002 9:40 PM Subject: Re: reducing tomcat & jasper memory footprint > Paul Yunusov wrote: > > On Monday 30 December 2002 02:37 pm, Julian Löffelhardt wrote: > > > >>Hi, > >> > >>I'm using Apache 1.3.26 and 3 tomcat 4.0.4 instances with AJP13 & > >>loadbalancing . Our application is a CMS where all the published articles > >>are generated offline as JSP-Files, one jsp per article. > >> > >>We had hige problems with the memory footprint. Due to the fact that every > >>jsp is generated as a class and there are about 200 new artices per day the > >>permanent segment of the JVM heap gets filled with all the classes, and I > >>get an OutOfMemoryError. My workaround for now is setting -XX:PermSize and > >>--XX:MapPermSize to higher values, but this just delays application > >>hang-up. > >> > >>With 64 megs of permSize our Server had an approx. uptime of 1 day now it's > >>about 3-4 days. > >> > >>Is there any way to unload jsp-Files (unload the class) ? > >> > >>llap, > >>julian > > > > > > JAVAC leaks memory every time a JSP class is compiled. The more JSPs are > > compiled or the more often JSP classes are compiled, the more memory is > > leaked. You exacerbate this problem by generating a JSP per article often. > > > > IMHO, generating a JSP per article is misusing the technology. JSP is a > > templating solution whereas one JSP describes a layout of any number of end > > documents. I suggest you change your software to generate an HTML file per > > artcile rather than a JSP. > > Maybe it's abusing the technology, but it really should work fine. > Workarounds for the problem include using jikes, or using javac out of > process (I don't quite remember how it is configured; since Jasper 2 > uses Ant javac task to compile, it should be in the Ant docs on the > javac task). > > Remy > > > -- > To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> > For additional commands, e-mail: <mailto:[EMAIL PROTECTED]> > > -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
