CA OPS/MVS uses a minimal amount of below-the-line CSA storage; at most, the main CA OPS/MVS address space uses about 2 KB of storage below the 16-MB line. CA OPS/MVS achieves this low CSA usage by using z/OS cross-memory services extensively, so the extended private area of the main CA OPS/MVS address space can store globally used data areas. However, much of the CA OPS/MVS code and some data areas reside in extended CSA (ECSA) storage.
We strongly recommend that you reserve 500 KB of ECSA for the use of CA OPS/MVS. Most sites have so much ECSA allocated that earmarking 500 KB for CA OPS/MVS does not require you to increase the amount of ECSA. However, if your site runs with a limited amount of ECSA, increase it by 500 KB before you install CA OPS/MVS.
Notes:
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