SDMOPT parameter: Difference between revisions
Jump to navigation
Jump to search
| Line 15: | Line 15: | ||
==Description== | ==Description== | ||
This User 0 system parameter is a bitmask parameter that affects sdaemon | This User 0 system parameter is a bitmask parameter that affects <var>[[Sdaemons|sdaemon]]</var> | ||
processing. | processing. | ||
The meaning of the bits are: | The meaning of the bits are: | ||
<dl> | <dl>or | ||
UTABLE commands. | UTABLE commands. | ||
While clearing of user tables is “nice” in some sense, | While clearing of user tables is “nice” in some sense, | ||
Revision as of 09:57, 25 May 2017
SDaemon options
Summary
- Default value
- X'03'
- Parameter type
- System
- Where set
- User 0 CCAIN parameters, or reset by a System Manager
- Related products
- All
- Introduced
- Sirius Mods 6.7
Description
This User 0 system parameter is a bitmask parameter that affects sdaemon processing. The meaning of the bits are:
- or
UTABLE commands.
While clearing of user tables is “nice” in some sense,
since daemons tend to do a lot of logging in and out and a lot of UTABLE
commands, this niceness can have a high CPU cost.
Other than being “nice” there is little benefit to clearing all the
server tables at these points.
- X'02'
- Do optimized file and group opens and closes when entering or exiting a subsystem. Since daemons that use APSY subsystems have a high ratio of subsystem exit/entry to subsystem processing, reducing this overhead can be a great CPU savings.
The default for SDMOPT of X'03' means that all the sdaemon optimizations are enabled. There should be no reason to disable any optimizations unless one is suspected of causing a bug.