Storage system values: When maximum usage is reached
The When maximum usage is reached system value is also known as QSTGLOWACN. You can use this system value to specify the action to take when the system disk pool has reached its maximum utilization.
| Quick reference | |
|---|---|
| Location | From IBM® Navigator for i, select . Right-click on Storage and click Properties, then select theGeneral tab. |
| Special authority | All object (*ALLOBJ) and security administrator (*SECADM). |
| Default value | Send message to system operator and message queue. |
| Changes take effect | Immediately. However, if the available storage is already at the maximum, the change will have no effect until the storage has dropped below the maximum and then reached the maximum again. |
| Lockable | No. |
What can I do with this system value?
You can specify the action to take when the available storage in the system disk pool (also known as auxiliary storage pool) has reached the maximum usage specified in the Maximum system disk pool usage (QSTGLOWLMT) system value.
You can specify any of the following actions:
- Send message to system operator and system message queue (*MSG)
- Message CPI099C is sent to the system message and system operator queues. This message is also sent for the other actions.
- Send message to service users (*CRITMSG)
- Message CPI099B is sent to the users specified in the service attributes to receive critical messages. Only users who are signed on at a workstation are notified.
- Run registered exit programs (*REGFAC)
A job is submitted to call exit programs registered for the auxiliary storage lower limit action (QIBM_QWC_QSTGLOWACN) exit point.
No action is taken if the system is in the restricted state.
If you select this action and available storage reaches the maximum limit, you cannot start a subsystem while the system is in the restricted state.
- End system to restricted state (*ENDSYS)
The system is ended to the restricted state.
No action is taken if the system is already in the restricted state.
If you select this action and available storage reaches the maximum limit, you cannot start a subsystem while the system is in the restricted state.
- Immediately power down and restart system (*PWRDWNSYS)
The system is powered down immediately and restarted.
No action is taken if the system is in the restricted state.
If you select this action and available storage reaches the maximum limit, you cannot start a subsystem while the system is in the restricted state.
If the available storage has reached the maximum limit during a restart and the action is not Send message to system operator and system message queue, the system will come up in the restricted state.
You cannot start a subsystem when the following conditions exist:
- The available storage is below the limit.
- The action is Run registered exit programs, End system to restricted state, or Immediately power down and restart system.
- The system is in the restricted state.
To start the subsystem, perform these actions:
- Reduce the available storage.
- Change the action to Send message to system operator and system message queue (*MSG) or to Send message to service users (*CRITMSG).
No action is taken if the following occurs:
- Available storage drops below the limit.
- The system is in the restricted state.
- The action is one of the last three options shown above.
The action is repeated every 30 minutes if the available storage is still at the maximum level.