Ebusiness Suite Health Check : Jserv/OC4J

Application Tier –Jserv/OC4J

• Set logging level to warning
  
  • ApJServLogLevel warn (jserv.conf)
    
  • jserv.properties
    
    • log.channel.warning=true
      
    • log.channel.critical=true
      
    • log.channel.debug=false
      
• Review jserv and JVM log files for exceptions or errors
  
  • $IAS_CONFIG_HOME/Apache/Jserv/logs
    
    • jserv.log
      
    • mod_jserv.log
      
• $LOG_HOME/ora/10.1.3/opmn/OC4J~<coregroupname>
  

  ~default_group~<core#>
  

  
   

  • Enable verbose GC
    

1. java.sh or jserv.properties
   

• -verbose:gc
  
• XX:+PrintGCTimeStamps
  
• -XX:+PrintGCDetails
  

1. Direct verbosegc output to a specific file
   

• $IAS_CONFIG_HOME/Apache/Apache/bin/java.sh
  
• -Xloggc: $JVMLOGDIR/$jsgrpid.$jsgrpindex.g
  

 

• Ensure you are running a current version of the JDK
  
  • 304099.1
    
  • 304099.1
    
• Upgrade to JDK 6.0
  
  • 10% performance improvement.
    
  • Thread synchronization optimization.
    
  • Adaptive Spinning.
    
  • Large page support for x86 platform.
    
  • Faster HashMap and arraycopy implementations.
    
  • Updated class list for system jars.
    
  • Dtrace probes included in JVM.
    
  • Refer to MetaLink note 401561.1 for instructions on how to upgrade to JDK 6.0
    

 

• Set the servlet session timeout to 30 minutes
  
  • zone.properties
    
    • session.timeout=1800000
      
  • Larger timeout values increase overall JVM memory footprint
    
• Upgrade to ATG RUP7
  
  • Numerous performance and scalability fixes fixes
    

  
   

• OutofMemoryErrors
  
  • Trigger a heap dump when an OutofMemoryError occurs
    
    • -XX:+HeapDumpOnOutOfMemoryError
      
    • -XX:HeapDumpPath=<path>
      
  • Can use tools such as jhat to view the heap dump file and drill-down
    
    • jhat starts an http server on port 7000