Sunday, February 18, 2007

LMS and real time priorities (2)

From my testing on with the following combination of parameters these are the results

_high_priority_processes _os_sched_high_priority Scheduler class
LMS* (default) 1 (default) RR
Null 0 TS
LMS* (default) 0 RR
Null 1 (default) TS

As can be seen the value of _os_sched_high_priority doesn’t seem to matter (or is this another bug) and LMS seems to run in the RR class only if the value of _high_priority_processes is LMS*.

Also we put other oracle processes in the RR class using this same parameter?

SQL> alter system set "_high_priority_processes"='PMON' scope=spfile;

System altered.

SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release - Production
With the Partitioning, Real Application Clusters, OLAP and Data Mining options

elephant-> srvctl stop database -d F8902PRD
elephant-> srvctl start database -d F8902PRD

elephant-> ps -efc | grep pmon | grep –v grep
oracle 4929 1 RR 90 17:57 ? 00:00:00 ora_pmon_F8902PRD1

Also the parameter _high_priority_processes was not in the base release (
and introduced in the patchset

1 comment:

Anonymous said...

you are real fool trying to be oversmart