Before changing the CSA allocation, you should understand:
- How much of the CSA area is used when the system is running
- How its use varies over time.
It is possible to specify too little CSA to allow the system and its
subsystems and applications to run. It is also possible to specify too
little to let it run for very long even if everything starts, because
CSA often fragments over time.
In the z/OS Initialization and Tuning Guide there is a topic, 1.4.3.1,
"SQA/CSA Thresholds," you should review before reducing CSA.
Another alternative is to reduce the number of libraries in the LPA list
(or in dynamic LPA). This will have an effect on system performance,
however, and there is another series of topics in section 1.4 of the
Initialization and Tuning Guide about the tradeoffs.
Lim Ming Liang wrote:
Thanks, Edward.
Using the IPCS to view the Virtual Storage Map, and misc tips.
I have adjusted the CSA parameter in the IEASYSxx, to give some storage
relief in the below 16M private area.
<snip>
--
John Eells
z/OS Technical Marketing
IBM Poughkeepsie
[email protected]
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