If you want to detect unused indexes check the Columns Last_Query_Use,
Last_Statistics_Use, Query_Use_Count, Query_Statistics_Count in the
SYSINDEXSTAT (Indexes only) or SYSPARTITIONINDEXSTAT (Indexes, LF, Key
Constraints) View in the QSYS2 schema.
They include the last used timestamp and how often they were used.
Indexes that are not used for a long time or not used at all, can be
deleted.
Mit freundlichen Grüßen / Best regards
Birgitta Hauser
Modernization ? Education ? Consulting on IBM i
"Shoot for the moon, even if you miss, you'll land among the stars." (Les
Brown)
"If you think education is expensive, try ignorance." (Derek Bok)
"What is worse than training your staff and losing them? Not training them
and keeping them!"
?Train people well enough so they can leave, treat them well enough so they
don't want to.? (Richard Branson)
-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
DEnglander--- via MIDRANGE-L
Sent: Dienstag, 12. Juli 2022 19:15
To: midrange-l@xxxxxxxxxxxxxxxxxx
Cc: DEnglander@xxxxxxxxxxxxxxx
Subject: DB2 Optimizer question
When the DB2 Optimizer uses an existing index to determine which access path
to use, does it update the Index Object's Last Used Date when it uses it?
I am trying to determine unneeded indexes, but don't want to remove ones
that the Optimizer uses or needs.
Thank you,
Doug
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