SDUMPOPT parameter
- Default value
- X'00000000 00000000' (dump running servers only)
- Parameter type
- System
- Where set
- On User 0's parameter line or reset by system manager
- Related products
- All
- Introduced
- Model 204 V7.9
Description
SDUMPOPT specifies the above the bar (ATB) storage areas which will be included when an asynchronous dump is taken by the z/OS operating system.
This parameter is only available under z/OS and only if asynchronous dumps are activated by setting SNAPCTL bits x'05' on.
Valid settings of SDUMPOPT are (options can be summed):
| Setting | Areas to dump... |
|---|---|
| X'00000000 10000000' | MXI workarea |
| X'00000000 08000000' | Checkpoint buffers |
| X'00000000 04000000' | Journal buffers |
| X'00000000 02000000' | Jlog buffers |
| X'00000000 01000000' | Temppage buffers |
| X'00000000 00800000' | Debug servers |
| X'00000000 00400000' | FDT file fields |
| X'00000000 00200000' | In-memory files |
| X'00000000 00100000' | Dataspaces |
| X'00000000 00080000' | Temppage DBCDs |
| X'00000000 00040000' | Constraints |
| X'00000000 00020000' | Record lock table |
| X'00000000 00010000' | ECF tables |
| X'00000000 00008000' | Compress buffers |
| X'00000000 00004000' | Janus buffers |
| X'00000000 00002000' | LDAP buffers |
| X'00000000 00001000' | Spill buffers |
| X'00000000 00000800' | Server swapping |
| X'00000000 00000400' | NUMBUFG buffers |
| X'00000000 00000200' | NUMBUFG DBCD/HASH |
| X'00000000 00000100' | Resident requests |
| X'00000000 00000080' | User area 0 |
| X'00000000 00000040' | User area 1 |
| X'00000000 00000020' | User area 2 |
| X'00000000 00000010' | User area 3 |
| X'00000000 00000008' | All Server areas |
| X'00000000 00000004' | Ready Server areas |
| X'00000000 00000002' | Reserved |
| X'00000000 00000001' | Reserved |
Undefined bits are reserved but may be specified. For instance, SDUMPOPT=-1 may be specified in order to turn on all defined ATB areas.
User defined ATB areas may be activated by setting the bit number into the third byte of register 1 before calling GCORE64. For example, to activate User area 1, register 1 is set to x'00003900' (bit number 57) prior to GCORE64.