B.4 Embedded database processes
This appendix explains the embedded database processes generated when the embedded database is used as the scheduler database of JP1/AJS3 - Manager.
- Organization of this subsection
(1) Process configuration
The following figure shows the configuration of the embedded database processes generated when the embedded database is used as the scheduler database of JP1/AJS3 - Manager in UNIX. This figure is useful for monitoring processes because it shows the parent-child relationship of the processes of the entire embedded database.
(2) Processes in Windows
The following explains the embedded database processes in Windows.
The Windows version of the embedded database consists of the following two types of processes:
-
Parent process
A parent process consists of at least one child process.
-
Child process
The status of parent and child processes can be checked on the Processes page in the Task Manager window.
The following table lists the parent and child processes. In the table, the number in parentheses following a process name indicates the number of instances that are activated concurrently.
- #1
-
When the version of the embedded database is 07-03 or earlier, two instances of this process are activated.
- #2
-
Initially, only one instance is activated. Thereafter, each time a pdsds.exe process terminates abnormally, the number of instances temporarily increases.
- #3
-
If the value of the pd_max_users operand in the system common definition file (pdsys) is changed, the new value becomes the maximum number of instances that can be activated.
- #4
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Initially, 16 instances are activated. Thereafter, the number of activated instances can increase to a maximum of 128 in response to the number of access requests for the embedded database.
- #5
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This process is activated if the version of the embedded database is earlier than 10-00.
(3) Processes in UNIX
The following explains the embedded database processes in UNIX.
The UNIX version of the embedded database consists of the following two types of processes:
-
Parent process
A parent process consists of at least one child process.
-
Child process
The status of parent and child processes can be checked by using the ps command.
The following table lists the parent and child processes. In the table, the number in parentheses following a process name indicates the number of instances that are activated concurrently.
- #1
-
When the version of the embedded database is 07-03 or earlier, two instances of this process are activated.
- #2
-
Initially, only one instance is activated. Thereafter, each time a pdsds process terminates abnormally, the number of instances temporarily increases.
- #3
-
If the value of the pd_max_users operand in the system common definition file (pdsys) is changed, the new value becomes the maximum number of instances that can be activated.
- #4
-
Initially, 16 instances are activated. The number of activated instances can increase to a maximum of 128 in response to the number of access requests for the embedded database.