According to the XWiki docs, 1GB should be sufficient to run XWiki.
For Java 8 (i.e. XWiki >= 8.1). Notice that there's no permgen anymore in Java 8: Small and medium installs: A minimum of 1024MB (-Xmx1024m)
I installed and configured Tomcat according to the documentation.
I have (in
JAVA_OPTS="-Djava.security.egd=file:/dev/./urandom -Djava.awt.headless=true -Xmx750m -XX:MaxPermSize=125m -XX:+HeapDumpOnOutOfMemoryError"
JAVA_OPTS="-Djava.security.egd=file:/dev/./urandom -Djava.awt.headless=true -Xmx1024m -XX:MaxPermSize=192m -XX:+HeapDumpOnOutOfMemoryError"
And it is crashing randomly. I cannot even add another user. This is the first part of the dump file
# There is insufficient memory for the Java Runtime Environment to continue. # Native memory allocation (mmap) failed to map 105709568 bytes for committing reserved memory. # Possible reasons: # The system is out of physical RAM or swap space # The process is running with CompressedOops enabled, and the Java Heap may be blocking the growth of the native heap # Possible solutions: # Reduce memory load on the system # Increase physical memory or swap space # Check if swap backing store is full # Decrease Java heap size (-Xmx/-Xms) # Decrease number of Java threads # Decrease Java thread stack sizes (-Xss) # Set larger code cache with -XX:ReservedCodeCacheSize= # JVM is running with Unscaled Compressed Oops mode in which the Java heap is # placed in the first 4GB address space. The Java Heap base address is the # maximum limit for the native heap growth. Please use -XX:HeapBaseMinAddress # to set the Java Heap base and to place the Java Heap above 4GB virtual address. # This output file may be truncated or incomplete. # # Out of Memory Error (os_linux.cpp:2766), pid=11420, tid=0x00007fcd0d720700 # # JRE version: OpenJDK Runtime Environment (8.0_212-b04) (build 1.8.0_212-b04) # Java VM: OpenJDK 64-Bit Server VM (25.212-b04 mixed mode linux-amd64 compressed oops)
I am not using HSQLDB. I am using Postgresql on the same server.
CentOS Linux release 7.6.1810 (Core), XWiki 10.11.8