If Access Manager is installed on a Sun Fire T1000 or T2000 server, the Patch 5 tuning scripts for Web Server 6.1 and Application Server 8 set the JVM GC ParallelGCThreads parameter to 8:
This parameter reduces the number of garbage collection threads, which could be unnecessarily high on a 32–thread capable system. However, you can increase the value to 16 or even 20 for a 32 virtual CPU machine such as a Sun Fire T1000 or T2000 server, if it minimizes full garbage collection activities.
Also, for Solaris SPARC systems with a CMT processor with CoolThreads technology, in the /etc/opt/SUNWam/config/AMConfig.properties file, it is recommended that you add the following property at the end of the file:
The default value is 16, but you can set this property to a lower value, depending on the number of cores in the Sun Fire T1000 or T2000 server.