JBOSS Heap Size
Please help on the JVM heap size settings for JBoss in the Linux environment.
We have been using JBoss version JBoss AS 7.1.1.Final "Brontes" in our PRODUCTION ENVIRONMENT.
The heapsize and garbage collection arguments that we use is as below. Few times, the JBoss server crashed because of the cache overflow issue. Please help to tweak the heap size arguments.
export JAVA_OPTS="
-server \
-Xms1024m \
-XX:PermSize=160m \
-XX:MaxPermSize=256m \
-XX:+UseParallelGC \
-Dsun.rmi.dgc.client.gcInterval=3600000 \
-Dsun.rmi.dgc.server.gcInterval=3600000 \
-Dsun.net.inetaddr.ttl=0 \
-Djava.awt.headless=true
-Djboss.shutdown.forceHalt=false \
-XX:+UseCompressedOops \
-Dmgnt.cluster.node.id=11141 \
-Duser.timezone=CST6CDT \
-Djava.net.preferIPv4Stack=true \
-Djboss.platform.mbeanserver \
-Djboss.modules.system.pkgs=com.wily,com.wily.*
-javaagent:/introscope_9.5.3/wily/Agent.jar -Dcom.wily.introscope.agentProfile=/introscope_9.5.3/wily/core/config/IntroscopeAgent.profile
-XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=$JBOSS_OOM_DIR"
Our system memory details are as below:-
MemTotal: 16467724 kB
MemFree: 603736 kB
Buffers: 367412 kB
Cached: 6828724 kB
SwapCached: 14848 kB
Active: 12828856 kB
Inactive: 2382404 kB
Active(anon): 6973424 kB
Inactive(anon): 1042916 kB
Active(file): 5855432 kB
Inactive(file): 1339488 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 20971512 kB
SwapFree: 20880240 kB
Dirty: 272 kB
Writeback: 0 kB
AnonPages: 8008520 kB
Mapped: 81088 kB
Shmem: 1216 kB
Slab: 405324 kB
SReclaimable: 322088 kB
SUnreclaim: 83236 kB
KernelStack: 8952 kB
PageTables: 27796 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 29205372 kB
Committed_AS: 15109176 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 307888 kB
VmallocChunk: 34359369556 kB
HardwareCorrupted: 0 kB
AnonHugePages: 7686144 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 10240 kB
DirectMap2M: 16766976 kB
