Administration guide > Tune and performance
Use WebSphere Real Time
Use WebSphere eXtreme Scale with WebSphere Real Time increases consistency and predictability at a cost of performance throughput in comparison to the default garbage collection policy employed in the standard IBM Java™ SE Runtime Environment (JRE). The cost versus benefit proposition can vary. WebSphere eXtreme Scale creates many temporary objects that are associated with each transaction. These temporary objects deal with requests, responses, log sequences, and sessions. Without WebSphere Real Time, transaction response time can go up to hundreds of milliseconds. However, using WebSphere Real Time with WebSphere eXtreme Scale can increase the efficiency of garbage collection and reduce response time to 10% of the stand-alone configuration response time.
- WebSphere Real Time in a stand-alone environment
Use WebSphere Real Time with WebSphere eXtreme Scale. By enabling WebSphere Real Time, you can get more predictable garbage collection along with a stable, consistent response time and throughput of transactions in a stand-alone eXtreme Scale environment.
- WebSphere Real Time in WAS
Use WebSphere Real Time with eXtreme Scale in a WAS ND environment version 7.0. By enabling WebSphere Real Time, you can get more predictable garbage collection along with a stable, consistent response time and throughput of transactions.
Parent topic:Tune and performance
Operating systems and network tuning
Plan for network ports
ORB properties and file descriptor settings
JVM tuning for WebSphere eXtreme Scale
Configure failover detection
Tune the dynamic cache provider
Tune the cache sizing agent for accurate memory consumption estimates