Limiting TCP/IP common and private storage utilization

You can limit the amount of common and private storage that TCP/IP can use by coding the GLOBALCONFIG parameters ECSALIMIT and POOLLIMIT in the TCP/IP profile.

The ECSALIMIT parameter specifies the maximum amount of common storage that TCP/IP can use.
The POOLLIMIT parameter specifies the maximum amount of TCP/IP private storage that TCP/IP can use.

The ECSALIMIT parameter ensures that TCP/IP does not overuse common storage. It can improve system reliability by limiting TCP/IP's storage usage. The limit must account for peak storage usage during periods of high system activity or TCP/IP storage abends might occur. The limit does not include the CSM storage used by TCP/IP.

Tip: Care should be taken when coding the ECSALIMIT parameter. Setting it too low can cause TCP/IP to terminate prematurely.

Specifying a nonzero ECSALIMIT value enables warning messages EZZ4360I, EZZ4361I, and EZZ4362I to be issued when a storage shortage occurs.

If necessary, the ECSALIMIT and POOLLIMIT parameter values on the GLOBALCONFIG statement in the TCP/IP profile may be increased with a VARY TCPIP,,OBEYFILE command. For additional information regarding the VARY TCPIP,,OBEYFILE command, see z/OS Communications Server: IP System Administrator's Commands.

See z/OS Communications Server: IP Configuration Reference for more information regarding use of the GLOBALCONFIG statement ECSALIMIT and POOLLIMIT in the TCP/IP profile.