Nonstop Database, HiRDB Version 9 System Definition
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- 7) pd_max_recover_process = concurrently-executable-full-recovery-processes-count
- ~<unsigned integer>((1-10))
- Specifies the number of processes to be recovered (REDO processes) during full recovery processing. For a HiRDB parallel server configuration, this operand specifies the number of processes to be recovered (REDO processes) per server (dictionary server or back-end server).
- Condition
- Parallel input/output processing is not performed for regular files.
- Specification guidelines
- The value to be specified depends on the file type:
| Condition |
Specification guideline |
| Character special files |
There are at least 10 character special files (per server) that define RDAREAs |
10 |
| There are fewer than 10 character special files (per server) that define RDAREAs |
Number of character special files |
| Regular file |
1 |
- Increasing the value of this operand increases the input/output concurrency during full recovery processing, and thus can shorten the recovery time. However, because a number of processes equaling value of this operand
![[Figure]](FIGURE/ZUENG005.GIF)
server count are started, determine a value by taking the aforementioned specification value guideline and HiRDB resources into consideration.
- Operand default
- When this operand is omitted, the specification of the same operand in the system common definition is assumed. When the same operand is also omitted in the system common definition, the default is 3.
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