|
|
|
By default, the CA MIM cell pooled control blocks are pageable. This implies that paging activity for these virtual storage areas is based on reference patterns as well as the overall availability of real storage frames in the system. The CA MII component makes extensive use of the cell pool for its control blocks that describe ENQ resource names and ENQ resource ownership. Any extreme paging activity can severely impact ENQ response time on the local system or throughout the entire MIIplex.
Typically, the CA MIM working set size remains fixed in real storage and there is no need to page fix its cell pool resident control blocks. However, in times of critical pageable storage shortages, frames can be stolen from the working set pages. If a given system is configured as such that it is real storage constrained, then you may want to prevent real frames from being taken from the CA MII address space. This ensures that ENQ processing remains optimized throughout the MIIplex, even during periods of real storage constraint on certain systems.
To indicate that CA MIM should page fix cell pooled areas unconditionally when actively in use, specify the following MIMINIT keyword:
MIMINIT PAGEFIX=YES
To indicate that CA MIM should conditionally page fix actively used cell pooled areas as long as the system is not experiencing a real frame shortage, specify the following MIMINIT keyword:
MININIT PAGEFIX=COND
| Copyright © 2011 CA. All rights reserved. | Tell Technical Publications how we can improve this information |