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litespeed_wiki:php:increase-memory [2015/07/28 20:07] (current)
Michael Alegre created
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 +====== Increase PHP Memory Limit for Java OutOfMemoryError ======
 +You have java installed on your server but are unable to load /​directory/​javatest.php
 +It shows a memory related error when run the java command:
 +java -version
 +java.lang.OutOfMemoryError:​ unable to create new native thread
 +OpenJDK Runtime Environment (rhel- u79-b14) instead of tomcat installed.
 +Check error log:
 +/​tmp/​jvm-81]cPs#​ cat hs_error.log ​
 +# There is insufficient memory for the Java Runtime Environment to continue.
 +# pthread_getattr_np
 +# Possible reasons:
 +#   The system is out of physical RAM or swap space
 +#   In 32 bit mode, the process size limit was hit
 +# Possible solutions:
 +#   ​Reduce memory load on the system
 +#   ​Increase physical memory or swap space
 +#   Check if swap backing store is full
 +#   Use 64 bit Java on a 64 bit OS
 +#   ​Decrease Java heap size (-Xmx/-Xms)
 +#   ​Decrease number of Java threads
 +#   ​Decrease Java thread stack sizes (-Xss)
 +#   Set larger code cache with -XX:​ReservedCodeCacheSize=
 +# This output file may be truncated or incomplete.
 +#  Out of Memory Error (os_linux_x86.cpp:​718),​ pid=553881, tid=139928360994560
 +# JRE version: ​ (7.0_79-b14) (build )
 +# Java VM: OpenJDK 64-Bit Server VM (24.79-b02 mixed mode linux-amd64 compressed oops)
 +# Derivative: IcedTea 2.5.5
 +# Distribution:​ Built on CloudLinux Server release 6.6 (Leonid Kizim) (Thu Apr 16 03:44:02 EDT 2015)
 +# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "​ulimit -c unlimited"​ before starting Java again
 +PHP memory limit for lsphp5 external app could be the problem. ​
 +You can  add "​system('​ulimit -a') at the beginning of the test script to find out the limits for that process. ​
 +Output phpinfo() is also a good idea to help identify the php memory_limit settting.
 +The memory [[http://​www.litespeedtech.com/​docs/​webserver/​config/​extapps#​memSoftLimit|soft limit]] of lsphp5 external app may need to be increased. If it has been increased and "​ulimit -a" from PHP script still shows a lower limit, you need to look into "​memory_limit"​ set by php.ini or overridden by "​php_value"​ in .htaccess. ​
 +Finally increase memory limit to 4GB, and add java command parameter to limit java's memory usage, javatest.php works now. 
 +Actually 4GB is not enough for default java runtime.
 +The java command result is normally sent to stderr and you can check /​usr/​local/​apache/​logs/​stderr.log for the java version output.
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  • Last modified: 2015/07/28 20:07
  • by Michael Alegre