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I am using DB2 on AS400 (V6R1).
When I execute a query the first time, It's taking long time (relatively speaking).
The next executions time of the same query are significantly shorter.
If I do not use this specific query for a while, the next time of execution gets longer again
It seems that the query was cached and after a while it was removed from the cache.
I assume this is due to caching policy of DB2.
I think the caching policy can be set in QAQQINI file (either in QSYS or QUSRSYS), but this is done for all queries and for a limited time.
I am looking for a way to keep a specific query in cache in order to improve performance.
Regards,
Tomer S.
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