The pdfchfs command modifies, for a HiRDB file system area, the maximum number of HiRDB file system area extensions (modifies the value of the -e option in pdfmkfs).
If a shortage of the process private area occurs and the value specified in the -e option of the pdfmkfs command is too large for the estimate, you can reduce the memory requirement for the process private area by making an appropriate modification to this value.
You execute the pdfchfs command in either of the following cases:
HiRDB administrator
pdfchfs -e maximum-number-of-extensions HiRDB-file-system-area-name |
Specifies a new maximum number of extensions for the HiRDB file system area, modifying what was specified in the -e option of the pdfmkfs command. You can determine the current maximum number of extensions by checking the available expand count value displayed in the pdfstatfs command's execution results. Note that this option cannot be specified if the current value exceeds the value of the -e option specified in the pdfmkfs command.
If the value of the -e option in the pdfmkfs command is equal to or greater than the estimated value, you can reduce the memory requirement for process private area that is used by each HiRDB server process by reducing the maximum number of extensions.
Guidelines for reducing the memory requirement:
For details about the process private area used by server processes, see Calculation of required memory in the HiRDB Version 9 Installation and Design Guide.
Specifies the name of the HiRDB file system area.
No. | Usage purpose | pdfchfs command execution procedure |
---|---|---|
1 | DB or SDB |
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2 | SYS |
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3 | WORK |
If a transaction is executed while the command is executing, the transaction will be placed in wait status until the pdfchfs command has terminated. The transaction's processing will be restarted after the pdfchfs command has terminated. |
4 | UTL |
If a utility is executed while the command is executing, the utility will be placed in wait status until the pdfchfs command has terminated. The utility will be restarted after the pdfchfs command has terminated. |
5 | SVR | The command cannot be executed while HiRDB is running. Stop HiRDB and then execute the command. |