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I have been asked to look into how to control adhoc queries from a
performance perspective.
System is V7R3
A good solution would be to automatically cancel a query if it exceeded a
length of execution time or configurable parameters.
I have been doing lots of reading and came across an article by Kent
Milligan
https://www.mcpressonline.com/analytics-cognitive/db2/techtip-routing-away-your-qzdasoinit-troubles
This explains how I could route QZDASOINIT prestart jobs to a different
sub-system based on user profile or group profile and set that subsystem
up with appropriate resources so as not to affect the entire system when a
user requests a query that brings the entire system to a standstill.
However just about every user has access to the query builder so maybe not
the best option.
The query builder is a third part tool that connects to a QZDASOINIT job
to execute the query and I believe then issues a sql statement against the
database and receives the result set. I am guessing JDBC connection.
While a brute force approach would be to check these jobs every five
minutes or so using a job information API I am hoping for a more proactive
approach where the system can notify of the situation and steps can then
be initiated to control or cancel the job.
Any suggestions would be appreciated.
Don Brown
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