Here is my understanding of WLM and dispatching priorities.
Dispatching priorities work the same way prior to WLM. If Service class is WLM
velocity, then the dispatching priority is a range, just like prior to WLM.
However, I don't remember which way SRM adjusts the DP. SRM would adjust DP
up/down depending upon the resource, I/O or CPU, being consumed within the
range.
For example;
- DP C0-CF, SRM would adjust the dispatching priority up or down, if the
process is using more I/O versus CPU.
- I believe SRM would move closer to CF, if I/O intensive and closer to
C0 if CPU intensive, but it could be the reverse
WLM only adjusts which dispatching priority range, if velocity.
Jerry
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf
Of Gerhard Adam
Sent: Thursday, April 05, 2018 7:23 AM
To: [email protected]
Subject: Re: WLM and Dispatching Priority
Has anyone ever seen something like this before? Two started tasks {both
DB2 address spaces] in the same service class and yet have different
dispatching priorities? This screen capture shows the essential details.
Any thoughts?
Adam
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