Rudi Ahlers wrote:
Filipe Brandenburger wrote:
Hi,
On Thu, May 8, 2008 at 6:00 PM, Rudi Ahlers <Rudi@xxxxxxxxxxx> wrote:
Exception in thread "main" java.lang.OutOfMemoryError: Cannot create
It looks like it's running out of memory when starting more threads.
Did you check if you have enough memory in this server to run Tomcat?
I think you need at least 512MB for it, but I would recommend more.
I know there are some tunings made to the JVM for it to request more
memory. If you do "ps -ef | grep java" when Tomcat is started you will
see some parameters starting with -X that will specify memory sizes,
check how much it requests. I don't really know how to tweak those,
check the script that starts Tomcat to see if it allows changing them.
What you're saying could be true, but I don't think it's the case.
I have confirmed with the client, and he says that 128MB RAM would be
enough for his app.
The default config is probably asking for more than that.
[root@vps06 /]# /etc/init.d/tomcat5 restart
Starting tomcat5: [ OK ]
[root@vps06 /]# ps -ef | grep java
tomcat 13918 1 62 02:40 ? 00:00:02
/usr/lib/jvm/java/bin/java
-Dcatalina.ext.dirs=/usr/share/tomcat5/shared/lib:/usr/share/tomcat5/common/lib
-Dcatalina.ext.dirs=/usr/share/tomcat5/shared/lib:/usr/share/tomcat5/common/lib
-Djava.endorsed.dirs=/usr/share/tomcat5/common/endorsed -classpath
/usr/lib/jvm/java/lib/tools.jar:/usr/share/tomcat5/bin/bootstrap.jar:/usr/share/tomcat5/bin/commons-logging-api.jar:/usr/share/java/mx4j/mx4j-impl.jar:/usr/share/java/mx4j/mx4j-jmx.jar
-Dcatalina.base=/usr/share/tomcat5 -Dcatalina.home=/usr/share/tomcat5
-Djava.io.tmpdir=/usr/share/tomcat5/temp
org.apache.catalina.startup.Bootstrap start
[root@vps06 /]# ps -ef | grep java
root 14011 12038 0 02:40 pts/0 00:00:00 grep java
[root@vps06 /]# free -m
total used free shared buffers cached
Mem: 256 20 235 0 0 0
-/+ buffers/cache: 20 235
As you can see, the first time I ran "ps -ef | grep java" I could see
that it's starting up, but the second time, it's not running
I have another terminal open with top running, and the memory usage
didn't even blink when I ran it
What jvm are you running? Chances are that you will have to install the
Sun version to run the app(s) so you might want to do that before much
other troubleshooting.
--
Les Mikesell
lesmikesell@xxxxxxxxx
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