alfresco4 cpu usage

As we transition to the new Hyland Community, some post links may be temporarily disrupted as we finalize redirects. We apologize for the inconvenience and are working to resolve this as quickly as possible. Details.

sharifu

I have set up alfresco 4 on centos 64bit. allocated 8gb ram with 2 cpu's
the server is dedicated jus tfor alfresco
Over the past month the cpu usage has increased by 25%

Can some one help me pinpoint why?


VM summary from jconsole



VM Summary
Thursday, 2 August 2012 11:53:07 o'clock BST

Connection name: 
controlRole@service:jmx:rmi:///jndi/rmi://hector.woking:50500/alfresco/jmxrmi
Virtual Machine: 
Java HotSpot(TM) 64-Bit Server VM version 17.1-b03
Vendor: 
Sun Microsystems Inc.
Name: 
26378@hector
Uptime: 
62 days 18 hours 35 minutes
Process CPU time: 
22 days 8 hours 29 minutes
JIT compiler: 
HotSpot 64-Bit Server Compiler
Total compile time: 
8 minutes

Live threads: 
    334
Peak: 
    399
Daemon threads: 
    299
Total threads started: 
159,604
Current classes loaded: 
32,843
Total classes loaded: 
38,693
Total classes unloaded: 
 5,850



Current heap size: 
1,823,115 kbytes
Maximum heap size: 
3,040,896 kbytes
Committed memory: 
3,040,896 kbytes
Pending finalization: 
0 objects
Garbage collector: 
Name = 'ParNew', Collections = 211,823, Total time spent = 6 hours 32 minutes
Garbage collector: 
Name = 'ConcurrentMarkSweep', Collections = 547, Total time spent = 1 hour 9 minutes

Operating System: 
Linux 2.6.18-194.17.1.el5
Architecture: 
amd64
Number of processors: 
2
Committed virtual memory: 
5,571,744 kbytes
Total physical memory: 
8,245,320 kbytes
Free physical memory: 
  395,204 kbytes
Total swap space: 
8,385,920 kbytes
Free swap space: 
8,385,816 kbytes

VM arguments: 
-Djava.util.logging.config.file=/opt/alfresco-4.0.d/tomcat/conf/logging.properties -Xms2G -Xmx3G -XX:MaxPermSize=512M -Xss1024k -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:CMSInitiatingOccupancyFraction=80 -XX:NewSize=1G -Dalfresco.home=/opt/alfresco-4.0.d -Dcom.sun.management.jmxremote=true -Djava.rmi.server.hostname=172.16.0.21 -Dsun.security.ssl.allowUnsafeRenegotiation=true -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/opt/alfresco-4.0.d/tomcat/endorsed -Dcatalina.base=/opt/alfresco-4.0.d/tomcat -Dcatalina.home=/opt/alfresco-4.0.d/tomcat -Djava.io.tmpdir=/opt/alfresco-4.0.d/tomcat/temp
Class path: 
/opt/alfresco-4.0.d/tomcat/bin/bootstrap.jar
Library path: 
/opt/alfresco-4.0.d/java/jre/lib/amd64/server:/opt/alfresco-4.0.d/java/jre/lib/amd64:/opt/alfresco-4.0.d/java/jre/../lib/amd64:/usr/local/apr/lib:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
Boot class path: 
/opt/alfresco-4.0.d/tomcat/endorsed/serializer.jar:/opt/alfresco-4.0.d/tomcat/endorsed/xalan.jar:/opt/alfresco-4.0.d/java/jre/lib/resources.jar:/opt/alfresco-4.0.d/java/jre/lib/rt.jar:/opt/alfresco-4.0.d/java/jre/lib/sunrsasign.jar:/opt/alfresco-4.0.d/java/jre/lib/jsse.jar:/opt/alfresco-4.0.d/java/jre/lib/jce.jar:/opt/alfresco-4.0.d/java/jre/lib/charsets.jar:/opt/alfresco-4.0.d/java/jre/classes

afaust

Hello,

it is difficult / near impossible to answer that based on the information at hand. I suggest you take some measurements on what's going on in your VM by regularily running jstack. This gives you output that may be helpful in determining what operations are being executed at times of high CPU usage. You may also use Alfresco auditing for collection of semantic data to see what use cases are executed by users and have some reference data for analysis (i.e. for a move, investigate the scope via node browser, e.g. how many nodes are affected etc.).

Regards
Axel