PLB_OSIDLETIME Keyword
PLB_OSIDLETIME={value}
This keyword causes the runtime to return unused execution time to the Windows OS for a period of (0 to 10)ms after any file IO lock fails. For any non-zero value, any locking loops in the runtime are slowed down and this prevents the task manager CPU usage value from going to a high percentage during heavy file IO locking operations.
When this keyword is set to zero, then all of the locking loops retain any idle time while waiting for a lock. When a value of zero is used, the runtime CPU usage can show to have a higher percentage while waiting on a FILEPI or record locks. If the PLB_OSIDLETIME keyword is not used, the default value is zero.
Setting this keyword to a non-zero value causes any locking loops to release any idle time back to the OS by the {ms} value specified for the PLB_OSIDLETIME keyword. The runtime CPU usage percentage in this case is lower while waiting on a FILEPI or record lock.
No matter what, the operation impact of using the PLB_OSIDLETIME depends on the PLB application IO and locking operations that are programmed. This keyword gives options for controlling the OS idle times to achieve a desired behavior for PLBWIN process interactions with other processes while doing heavy file IO operations that involve heavy locking operations.
A general expectation for the PLB_OSIDLETIME setting values is defined as follows:
|
{ms} |
Windows OS Idle Time Affect |
|
0 |
The Windows OS idle time is minimized. The PLBWIN runtime does not waste any time while looping to wait on a file lock. This is the default value for the PLBWIN runtime. |
|
1 |
The PLBWIN runtime wastes 1ms time while looping to wait on a file lock. |
|
10 |
The Windows OS Idle time is maximized. The PLBWIN runtime wastes 10ms time while looping to wait on a file lock. |
Example:
PLB_OSIDLETIME=3
See Also: PLBSERVE Keywords, PLBSERVE Command Syntax
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