Java problems¶
This is probably most relevant with regard to Tomcat configuration.
Java has a number of performance and configuration options available which can be determined using sources such as the following
- For command-line Java 7 args.
- Determining the defaults :
java -XX:+PrintFlagsFinal -version.- For Java 7 Garbage Collection.
- 3rd party Heap Space explanation.
- Stack Overflow application memory usage.
See also
Java memory use / OutOfMemoryError¶
If this error appears in the process of log file analysis
then it may be necessary to increase the amount of memory available to Java,
perhaps using the JAVA_OPTS environment var (or CATALINA_OPTS if
specifically for Tomcat), e.g.
CATALINA_OPTS="-Xms1g -Xmx1g -Xss1g -XX:PermSize=256m -XX:MaxPermSize=256m".
Having said that, it has been noted by some commentators that increasing the
available memory may simply obscure temporarily a deeper problem such as memory
leaking.