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Posted to users@tomcat.apache.org by Helmut Eggebert <he...@hotmail.com> on 2005/01/24 18:44:52 UTC
out of memory error with more than a few sites
Hi,
I am getting an out of memory error when I start Tomcat. I read posts on
this in the past and followed some instructions to increase by min and max
memory settings in catalina.sh. I have 1028 MB on this server and so I
increased the min to 128 and the max to 768.
The server was working fine when I had a few test sites on it. I am
currently using Apache httpd 2.0.52, Tomcat 5.0.28 and mod_jk2 configured
with workers2.properties and so that tomcat can listen to apache requests.
Apache httpd serves static files and Tomcat
is set to work on jsp's with the directive:
<LocationMatch "/*.jsp">JkUriSet worker ajp13:localhost:8009</LocationMatch>
The problem showed up when I started migrating some sites over and increased
the number of hosts significantly. I created 80 VirtualHosts in httpd.conf
and 80 hosts in server.xml. Then I created 80 corresponding directories in
webapp, each with META-INF and WEB-INF subdirectories.
Even though all these directories and subdirectories are empty, when I start
up Tomcat, it tries to deploy them all and throws the out of memory error.
If I remove most of the hosts in server.xml, everything runs fine again.
My goal is to have these sites each with a large number of static pages and
only a few jps's which are Lucene's search.jsp and results.jsp. After this
I want to have these sites each has a portal component using Jetspeed 2.
I know that if Tomcat was not in the picture this server would be able to
handle many more sites, but is 80 hosts with only a few jsps in each too
much for Tomcat on an average modern Web server? How can I optimize this?
Below I have included code snippets of my httpd.conf and server.xml and
workers2.properties.
Thanks.
#--------------------------
#httpd.conf snippet
#--------------------------
<VirtualHost *:80>
DocumentRoot /opt/jakarta-tomcat-5.0.28/webapps/sitename
ServerName sitename.com
ServerAlias www.sitename.com
DirectoryIndex index.html index.jsp index.cgi index.php
CustomLog logs/sitename_access_log combined
ErrorLog logs/sitename_error_log
<LocationMatch "/*.jsp">
JkUriSet worker ajp13:localhost:8009
</LocationMatch>
ScriptAlias /WEB-INF/
/opt/jakarta-tomcat-5.0.28/webapps/sitename/WEB-INF/
<Directory "/opt/jakarta-tomcat-5.0.28/webapps/sitename/WEB-INF">
AllowOverride None
Options None
Order allow,deny
Allow from all
</Directory>
ScriptAlias /META-INF/
/opt/jakarta-tomcat-5.0.28/webapps/sitename/META-INF/
<Directory "/opt/jakarta-tomcat-5.0.28/webapps/sitename/META-INF">
AllowOverride None
Options None
Order allow,deny
Allow from all
</Directory>
<Directory /opt/jakarta-tomcat-5.0.28/webapps/sitename/logs>
AllowOverride AuthConfig
</Directory>
ErrorDocument 404 http://www.sitename.com/errorpages/404.html
</VirtualHost>
#--------------------------
#server.xml snippet
#--------------------------
<Host name="sitename.com" debug="0" appBase="webapps"
unpackWARs="true">
<Alias>www.sitename.com</Alias>
<Logger className="org.apache.catalina.logger.FileLogger"
directory="logs" prefix="sitename." suffix=".log"
timestamp="true"/>
<Context path="" docBase="sitename" debug="0"
reloadable="true"/>
</Host>
#---------------------------------------
#workers2.properties snippet
#---------------------------------------
[shm]
info=Scoreboard. Requried for reconfiguration and status with multiprocess
servers.
file=anon
# Defines a load balancer named lb. Use even if you only have one =machine.
[lb:lb]
# Example socket channel, override port and host.
[channel.socket:localhost:8009]
port=8009
#host=localhost
host=127.0.0.1
# define the worker
[ajp13:localhost:8009]
channel=channel.socket:localhost:8009
group=lb
# Uri mapping
# Map the Tomcat examples webapp to the Web server uri space
[uri:/examples/*]
group=lb
[status:]
info=Status worker, displays runtime information
[uri:/jkstatus/*]
info=The Tomcat /jkstatus handler
group=status:
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Re: out of memory error with more than a few sites
Posted by Tim Funk <fu...@joedog.org>.
http://jakarta.apache.org/tomcat/faq/memory.html
I bet your machine has some kernel limits on number of open files that you
are passing.
-Tim
Helmut Eggebert wrote:
> Hi,
>
> I am getting an out of memory error when I start Tomcat.
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