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Status Not under consideration
Workspace Db2 for z/OS
Created by Guest
Created on Feb 10, 2020

RELATED IDEAS

DDLTOX multiplier for IRLMRWT (allow values between 0 and 1)

DB2 subsystem parameter DDLTOX allows us to specify how long a DDL request will wait for a resource before timing out.
We have it set to the default value of 1, so the value of IRLMRWT applies, which we have set to 60 seconds.  (Note that this is to avoid the risk of a flood of -911's on Hyperswap completing).
Our request for enhancement here is to be able to specify a multiplier between 0 and 1, such as 0.1 for example, such that a DDL request would wait (in our case) for only 6 seconds, instead of 60 seconds.
This would be especially useful now that we are in FL500 and subject to PI86123, where certain ALTER TABLESPACE statements are now potentially disruptive for the first execution after FL500.
Ideally we don't want an ALTER TABLESPACE statement to wait for 60 seconds whilst trying to quiesce the operational packages, meanwhile blocking new threads.  Our concern is that if are multiple hot packages impacted by the same ALTER, we could see the first wait for, say 50 seconds, then another 50 on the 2nd wait, and so on, consequently much longer than IRLMRWT before a -904 is returned to the ALTER - so there is potential for a much longer period of disruption.

Needed by Date May 11, 2020

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