Managing the pool structure

It is important to watch out for signs that the pool structure is becoming full, as this might have a serious impact on all the applications that are using the pool.

Monitoring pool structure usage levels
Use the DISPLAY POOLSTAT server command to display the current usage level of the pool structure.
Operator messages reporting on pool structure usage
Messages to the operator are issued when threshold levels are reached for the numbers of entries or elements used. Further messages are issued if the pool becomes full. You can set up automated operations processes to watch for these messages and alert your operators to the situation, or take corrective action, if necessary.
Use of CFRM automatic ALTER to increase pool structure size
The coupling facility resource management (CFRM) policy can specify the keyword ALLOWAUTOALT(YES).
Using system-managed rebuild to increase pool structure size
If the structure has not many entries or elements left, but it has already reached its maximum size, you can still use system-managed rebuild to expand it dynamically without closing down the servers, if all the systems using the structure are at a level which supports this function.
Increasing the number of data lists
If the number of data lists specified via the MAXQUEUES or MAXTABLES server parameter is too small, an attempt to allocate a new data list will fail with message DFHXQ0443 or message DFHCF0443.
Deleting or emptying the pool structure
If the pool structure is no longer required, or all of the data in the structure is to be discarded, you can delete a pool by closing down all the servers for that pool, and then using the SETXCF FORCE command to delete the structure.

Parent topic: Coupling facility server operations