How to limit memory usage of tomcat / geoserver

Question

Hi there, I have succesfully installed Tomcat and then Geoserver in my webserver, but when i try to configure Geoserver i am receving messages from webfaction with the issue of "memory usage over limit" and then the application is killed. My webserver has 1024MB and the messages are related to usage over 1130, 1150MB.

I have tried to limit the memory usage by geoserver with the tips from here with -Xms128m and Xmx128m and -XX:MaxPermSize=512m instances but with no success. Then i have read lots of webfaction q&a but none of then have my answer.

Thanks in advance. Gabriel

Answer 1

0

The various JAVA_OPTS that you mentioned are the recommended way to limit the memory usage of your Tomcat instance. Be sure to fully stop and restart your Tomcat app after you set them.

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answered 10 Oct '16, 18:38

seanf
12.2k●4●18●36
accept rate: 37%

So, when i check the numbers for the memory usage it gives me:

$ java -XX:+PrintFlagsFinal -version | grep -iE 'HeapSize|PermSize|ThreadStackSize' intx CompilerThreadStackSize = 0 {pd product} uintx ErgoHeapSizeLimit = 0 {product} uintx HeapSizePerGCThread = 87241520 {product} uintx InitialHeapSize := 524288000 {product} uintx LargePageHeapSizeThreshold = 134217728 {product} uintx MaxHeapSize := 8382316544 {product} intx ThreadStackSize = 1024 {pd product} intx VMThreadStackSize = 1024 {pd product} openjdk version "1.8.0_102" OpenJDK Runtime Environment (build 1.8.0_102-b14) OpenJDK 64-Bit Server VM (build 25.102-b14, mixed mode)

I can be talking nonsenses here, but my only guess of what could be going on is with the MaxHeapSize that goes way under, 8gb is that correct? But i have already used the -Xmx command with 128m and apparently nothing happened. Still, I am testing possibilities and have to restart the tomcat module since it breaks down every couple of minutes after i initiate it. If someone could give me a hit, i would appreciate it. Thanks in advance, Gabriel

(11 Oct '16, 00:52) gabrielnn

I'm not 100% certain, but I believe the output of java -XX:+PrintFlagsFinal -version will show what is built in to Java, and does not reflect the environment set by JAVA_OPTS.

If you want to set the memory options for your app and then verify that they are in use, then go into your app directory and execute the following commands:

 export JAVA_OPTS="-Djava.awt.headless=true -server -Xms128m -Xmx128M -XX:MaxPermSize=512m 
./bin/startup.sh
jinfo -flags $( cat temp/catalina.pid )

(11 Oct '16, 17:02) seanf

How to limit memory usage of tomcat / geoserver

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