Set the amount of storage that is available to
main temporary storage queues in the CICS region.
Description
The CEMT SET TEMPSTORAGE command changes the limit for the amount of storage that is available for main temporary storage queues to use.
When you change this limit, check your current setting for the z/OS parameter MEMLIMIT. MEMLIMIT limits the amount of 64-bit storage that the CICS address space can use. Your setting for TSMAINLIMIT must not be greater than 25% of the MEMLIMIT value. Use the CEMT command INQUIRE DSAS or INQUIRE SYSTEM to find the value of MEMLIMIT that currently applies to the CICS system.
Options
- TSMAINLIMIT(value)
- Specifies the maximum amount of storage that CICS makes available
for main temporary storage queues to use. The minimum value is 1048576
bytes (1 MB), and the maximum value is 34359738368 bytes (32768 MB
or 32 GB).
You can enter a value in bytes, megabytes followed by the letter M, or gigabytes followed by the letter G. If you enter a value in bytes, it is rounded down to the nearest megabyte.
If you decrease the TSMAINLIMIT setting, CICS attempts to maintain at least 25% free space in allowed storage above current utilization, so that temporary storage write requests do not reach TSMAINLIMIT too rapidly. The value is set as follows:- If there is currently less than 25% free space, TSMAINLIMIT remains unchanged.
- If at least 25% of the new limit will be free space, the setting is decreased to the value that you choose.
- If less than 25% of the new limit would be free space, the setting is decreased to the current utilization plus 33% of that utilization.
If you increase the TSMAINLIMIT setting, the value is set as follows:- If the new value is not greater than 25% of the value of the z/OS parameter MEMLIMIT, the value that you choose is set.
- If the new value is greater than 25% of the MEMLIMIT value, TSMAINLIMIT remains unchanged.
