Performance Tuning for Oracle WebCenter Content 11g - Fishbowl ...

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In WebCenter Content 11g, the content management solution is deployed inside Weblogic Server (WLS), with any JVM tuning performed on the application server. You have full control, either by modifying the managed server using the administrative console or modifying the USER_MEM_ARGS environment variable startup scripts. Oracle’s documentation suggests the following on Unix and Windows with the JRockit JVM: -Xms256m -Xmx1024m –XnoOpt The –Xmx flag specifies the maximum heap size with this example specifying 1GB of memory. Best practice is to keep your JVM heap settings under 75-80% of the available physical RAM, within limits for machines with excessive amounts of memory. As heap size is increased, CPU load will also increase for larger garbage collections. Under 32-bit operating systems, 1.5GB is the practical maximum limit assuming other services are not consuming resources. The –Xms flag specifies the minimum heap size on initial startup. Increasing the heap takes considerable time, so it is best to set the Xmx and Xno parameters to the same size. For example: -Xms1024m -Xmx1024m -XnoOpt -XgcPrio:throughput On x86 and x64 hardware, JRockit should be the preferred JVM. JRockit was a Java virtual machine optimized for x86 hardware by Intel, purchased by BEA, and acquired by Oracle. The JRockit JVM performs significantly faster on x86 or x64 Windows and Linux architectures than Sun’s architecturally neutral JVM implementation. An example of JVM tuning, from another Oracle whitepaper, started with: -Xms3g -Xmx3g -XX:PermSize=512m -XX:MaxPermSize=512m -XX:+UseParallelGC -XX:ParallelGCThreads=8 -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:NewRatio=3 -XX:+UseAdpativeSizePolicy -XX:+AggressiveHeap -XX:+DisableExplicitGC -Xnoclassgc -Xloggc: and continued to tune WebCenter as: -d64 -server -Xms3g -Xmx3g -XX:PermSize=512m -XX:MaxPermSize=1024m -XX:+AggressiveOpts -XX:+UseParallelGC -XX:ParallelGCThreads=16 © 2012. Fishbowl Solutions, Inc.
-verbose:gc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:NewRatio=4 -Xnoclassgc -Xloggc: -Dweblogic.threadpool.MinPoolSize=72 -Dweblogic.threadpool.MaxPoolSize=72 -Dweblogic.SocketReaders=12cketReaders=12 -Djps.auth.debug=false Operating system architecture does not on its own provide enough information to properly tune the Content Server. As seen in the above example, repeated tuning and testing was required to find an optimum configuration. The content repository has the additional complexity of requiring different performance configurations for contribution and consumption environments. A heavy ingestion pattern will benefited from a -XgcPrio:throughput garbage collection, while searching may benefited from other GC models. Confirm your capitalization is correct. In many cases, command-line options are case sensitive unless explicitly stated. A configuration flag improperly set may be ignored, or cause unintended consequences. Disk Usage WebCenter Content, like the earlier versions of the content repository, has a variety of disk mounting options, with implications for what type of storage may be appropriate for each area. Directories within the content repository may have different service level agreements and performance requirements. Using a single storage system does not produce optimal performance-cost cost optimization. The latest incarnation of the Oracle Content Repository, a shared file system is still required for clustering. The ECM services run as Java processes. Prior to 11g, these services took the strategy of keeping a memory cache, writing to a shared file system or database, and having the other nodes update their local cache. All content management services continue to be stateless and utilize the same concurrency mechanism even though they are living in a Java Enterprise Edition world. © 2012. Fishbowl Solutions, Inc.
Page 1: Performance Tuning for Oracle WebCe
Page 5 and 6: Logging 11g uses the Weblogic loggi
Page 7: Under a contribution-consumption co

Performance Tuning for Oracle WebCenter Content 11g - Fishbowl ...

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