MONITOR SIZE command
Summary
- Privileges
- System administrator
- Function
- The MONITOR SIZE command returns a screen display of the current definitions for a journal or checkpoint stream along with the current usage.
Syntax
MONITOR SIZE {[JOURNAL | JRNL] | [CHECKPOINT | CHKP] | CCAJRNL | CCAJLOG | CHKPOINT | CHKPNTS}
Where:
| JOURNAL | (or JRNL) specifies to display the definitions and current usage for the CCAJRNL and CCAJLOG streams. |
|---|---|
| CHECKPOINT | (or CHKP) specifies to display the definitions and current usage for the CHKPOINT and CHKPNTS streams. |
Example
MONITOR SIZE CHKP DDNAME TYPE TRKS_ALLOC TRKS_USED PCT_USED ________ _________________ __________ _________ ________ CHKPOINT (GDG STREAM) CHK1 (DATASET) 100 40 40% CCA008\M204V710.CHKPOINT.G3371V00\+5 CHKPNTS (DATASET) 5000 3000 60% CCA013\M204V710.CHKP5
In the previous example, CHKPOINT is defined as a GDG STREAM consisting of member CHK1, a GDG data set. The volser, GDG data set name and relative generation are displayed.
CHKPNTS is defined as a simple data set. Its volser and data set name are also displayed.
Note: CPMAX=1 and a checkpoint occurs, the CHKPOINT data set, in this case CHK1, is repositioned to the beginning of the data set (the first data set if a GDG) and the TRKS_USED is reset to zero.
When a sub transaction checkpoint is taken, a switch from CHKPOINT to CHKPNTS or vice-versa occurs and the target of the switch is repositioned to the beginning of the data set and TRKS_USED is reset to zero but starts increasing immediately. The switched from member has TRKS_USED set to zero.
In addition, you can restrict the output of the MONITOR SIZE command to only the one specified stream, for example:
MONITOR SIZE CCAJLOG