When running in a virtualized environment like z/VM it's beneficial if the hypervisor knows if a server is idle or not. Usually this is implemented by waiting a certain time before considering a server truly idle. The problem is that many of the applications and middleware products do housekeeping tasks way too often for this to be really effective. So any effort to lower this "noise" is good. The updated whitepaper "WebSphere Application Server - Idle Server Tuning" provides tuning suggestions for a Websphere environment to reduce this noise.
On top they also provide tuning recommendations to reduce the startup time. The team updated the paper to cover WAS v8 and v8.5.5 including the Liberty profile.
Showing posts with label Websphere. Show all posts
Showing posts with label Websphere. Show all posts
September 3, 2013
May 2, 2013
New performance whitepaper on exploiting System z crypto hardware with WebSphere 8 for Linux on System z
System z offers hardware accelerations for all kinds of cryptographic operations. The new whitepaper "IBM WebSphere Application Server Version 8 for Linux on IBM System z – SSL Setup and Performance Study" shows how to set up WebSphere and Linux.
The performance numbers are quite impressive, especially for RSA 4096.
The performance numbers are quite impressive, especially for RSA 4096.
March 7, 2012
New Whitepaper: "WebSphere Application Server Horizontal Versus Vertical JVM Stacking Report"
This new whitepaper addresses the question if one should do a 1:1 consolidation or putting more than one server into a zLinux guest from a performance perspective. The sweet spot for the setup used here was at 10 JVMs per guest.
It also looks at the alternatives for sharing the application binaries between guests using Discontiguous Saved Segments (DCSS) and shared z/VM minidisks. Here it turned out that starting from 10 guests the DCSS setup was more efficient.
It also looks at the alternatives for sharing the application binaries between guests using Discontiguous Saved Segments (DCSS) and shared z/VM minidisks. Here it turned out that starting from 10 guests the DCSS setup was more efficient.
December 13, 2011
New whitepaper: "Sharing A WebSphere Application Server V8 Installation Among Many Linux for IBM System z Servers"
In the new white paper "Sharing A WebSphere Application Server V8 Installation Among Many Linux for IBM System z Servers" you find a hands on description on a more complex WAS server setup. This is the update of the white paper covering WebSphere Application Server V7.
So if you want to install once and use the installation in many Linux guests take a look at this.
So if you want to install once and use the installation in many Linux guests take a look at this.