HP 3000 Manuals HP 3000 Manuals
Altering Execution Priority
MPE is shipped with three user scheduling queues, CS, DS, and ES. The
default configuration for these queues is as follows:
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| | | |
| Queue | Priorities | Quantum |
| | | |
-----------------------------------------------------------------------------------------------------
| | | | | |
| | Base | Limit | Minimum | Maximum |
| | | | | |
| CS | 152 | 200 | 0 | 300 |
| | | | | |
| DS | 202 | 238 | 1000 | 1000 |
| | | | | |
| ES | 240 | 253 | 1000 | 1000 |
| | | | | |
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The ES queue is the background queue. On systems where there is no
background activity occurring, the ES queue can be tuned so that it is a
subset of the CS queue. That is, the priorities of the ES queue lie
inside the priorities of the CS queue as follows:
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| | | |
| Queue | Priorities | Quantum |
| | | |
-----------------------------------------------------------------------------------------------------
| | | | | |
| | Base | Limit | Minimum | Maximum |
| | | | | |
| CS | 152 | 200 | 0 | 300 |
| | | | | |
| DS | 202 | 238 | 1000 | 1000 |
| | | | | |
| ES | 175 | 185 | 300 | 300 |
| | | | | |
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By tuning Resource Sharing to run in the ES queue this way, light online
terminal users will have precedence in access to system resources over
the PDSERVER program. At the same time, heavy online users (compiles,
query searches, and so on) will have to wait for PDSERVER to complete.
You may need to modify your execution priority often to meet your ongoing
performance requirements. For instance:
* If the ES queue is already in use, tuning of the queue may not
accomplish an overlap of the CS and ES queue as desired.
* Any time a START NORECOVERY of the system is needed, the tuning
information will be lost and the ES queue must be retuned.
Therefore, this tuning configuration for the ES queue should be
included as part of the System Startup State Configurator
(SYSSTART.PUB.SYS file).
Resource Sharing provides the ability to execute the print disc
server (PDSERVER) in any of the three user scheduling queues. The
configuration for this is done in the Resource Manager Utility
(RESMGR) when you configure the logon string accounting structure.
Altering the executing priority can make Resource Sharing more
compatible with online transaction processing applications.
To alter the execution priority in the scheduling queue:.
* Run RESMGR.
The following steps show this task using function labels. The
command sequence is shown at the end of the steps.
* Choose Config f3.
The CONFIG prompt appears.
* Choose the OtherKeysf1.
* Choose Logonf2.
* At the LOGON> prompt, enter:
RESHHR,user[/password],account[/password],group[/password];PRI=??
The ?? can be CS, DS, or ES.
_________________________________________________________________
NOTE The PRI= value must not exceed the MAXPRI value on the
PCUSER.SYS user. MAXPRI is changed with the MPE command
ALTUSER. Use the LISTUSER command to display the MAXPRI
value.
_________________________________________________________________
* Exit the CONFIG subsystem, by choosing:
RESMGR MAINf8
EXITf8
To use commands to change the LOGON, enter
CONFIG
LOGON
Then enter your logon string as described in step 5. Enter the EXIT
command twice to return to the MPE prompt.