The main limit conditions or constraints that can occur in a CICS® system include those listed at the beginning of this section. Stress conditions generally tell you that certain limiting conditions have been reached. If these conditions occur, additional processing is required, and the transactions involved have to wait until resources are released.
To summarize, limit conditions can be indicated by the following:
In most circumstances, allocation of more virtual storage does not in itself cause a degradation of performance. You should determine the reason for the condition in case it is caused by some form of error. This could include failure of applications to free storage (including temporary storage), unwanted multiple copies of programs or maps, storage violations, and high activity of nonresident exception routines caused by program or hardware errors.
All new applications should be written to run above the 16MB line. The dynamic storage areas above the 16MB line can be expanded up to the 2GB limit of 31-bit addressing. The dynamic storage areas below the 16MB line are limited to less than the region size, which is less than 16MB.
Check how frequently the limit conditions occur. In general:
Your own actions should include: