Mailinglist Archive: opensuse-factory (850 mails)

[Manfred Tremmel <Manfred.Tremmel@xxxxxx>]

Am Donnerstag, 14. September 2006 23:59 schrieb Pascal Bleser:
> Manfred Tremmel wrote:
> > Am Donnerstag, 14. September 2006 21:34 schrieb Pascal Bleser:
> >> Andreas Jaeger wrote:
> >>>> to 1.5.0 on my knightsoft-net Webserver, it needs to much memory
> >>>> for the small vserver.
> >>
> >> The same bytecode uses more RAM when running with 1.5 than with
> >> 1.4 ?
> >
> > The virtual machine needs more RAM to start, so I don't have enough
> > space left for my own servlets. I've rent the smalest version of
> > the VServer which is very limited in ram (in the FAQ the provider
> > says it's to small for tomcat, I never could belive it ;-) ). Using
> > java 1.5 I can watch two generated pages, the third one ends with a
> > out of memory entry in the logfils. Using java 1.4.2 it works
> > stable without a problem, even with high loads.
>
> http://java.sun.com/j2se/1.5.0/docs/guide/vm/gc-ergonomics.html
>
> Just start the 1.5 JVM with
> -Xmx64m
> and you will have the same heap size as the default heap size on 1.4

Sorry, you've understand something wrong, the RAM is very limited! 
Using -Xmx31m works, using -Xmx30m is to less to start tomcate 
and -Xmx32m is to much to get it stable run (even a simple ls fails 
because of missing ram).

> Tiger (1.5) is definitely faster than 1.4 (even with 1.4 bytecode,
> it's really the JVM that's faster), it should just be a matter of
> configuring the maximum heap size (and possibly the thread stack size
> (-Xss)), as the defaults have changed (see URL above).
>
> If you use the 1.5 JVM, you should really try out Tomcat 5.5, it has
> vast improvements, if you don't already use that version now.

I belive it, but the knightsoft-net servier is the only one I can 
decide, what's installed, all the intranet-servers I'm developing for I 
can't so I'll try to get the same base. My framework I've created for 
my website is also the backround for all other developments.

> As a replacement for Tomcat, Winstone should have lower demands in
> terms of resources: http://winstone.sourceforge.net/
> (dual-license LGPL/CDDL; it supports servlet 2.5, AJP, vhosting, SSL,
> JNDI, clustering, etc... - for JSP support, you must add Tomcat's
> Jasper, but that's documented)
>
> Jetty should be memory-friendlier than Tomcat as well:
> http://jetty.mortbay.org/

Ok, I think I should take a look on this two alternates.

> Though it's perfectly fine to run Tomcat with just 64MB. We've got
> JIRA running in production (around 80 users, overall) with Tomcat and
> 64MB.

Hey, I'm doing my performance tests on a i486/66 with 24 MByte RAM, Java 
1.3 with Apache + JServ (SUSE 7.3). It's a good motivation to invest 
some time in optimising the code, when you work with such a server ;-)

-- 
Machs gut    | http://www.iivs.de/schwinde/buerger/tremmel/
             | http://packman.links2linux.de/
Manfred      | http://www.knightsoft-net.de

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