17 Oct
2006
17 Oct
'06
12:41 a.m.
Hi,
Am Di, den 17.10.2006 schrieb Smith, Nathan um 0:11:
Bye
Frank
Dear xwiki-users,
We are getting a Java exception when saving a 7MB attachment. The
attachment appears to be attached properly, since it appears in the
attachment list and can be downloaded after the error. However, after
attaching four or five files the server becomes so unresponsive that a
restart is required. Configuration Info:
OS: Windows 2000 Server
RAM: 1GB
JDK: 1.5.0_8
App Server: JBoss 4.0.4
Database: MySQL 4.1.21
Note that JBoss is run with -Xmx 512M, and increasing that to -Xmx
1024M has no effect.
To set the max memory of a java VM to the maximum of the physical space
isn't a good idea. I'm not sure how windows react, but under linux the
machine is going under big pressure and works only with the swap daemon.
Last time I tried this our linux server has a short-time
load of >38 :-(.
To get an idea what the real problem is, isn't easy. Not in all
cases the error message is correct and heap space the problem.
If you have the possibility try more physical memory in your machine.
For a server 1 GB is not very much. If this doesn't help or
not possible you have to investigate more time in the analysis
of log messages of the garbage collector. You get more
information about the memory usage if you switch on GC logs
with -verbose:gc