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
Mit freundlichen Grüßen / Best regards
Modernization ? Education ? Consulting on IBM i
"Shoot for the moon, even if you miss, you'll land among the stars." (Les
"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)
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
DEnglander--- via MIDRANGE-L
Sent: Dienstag, 12. Juli 2022 19:15
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.
"CONFIDENTIALITY NOTICE: This e-mail transmission (and/or the attachments
accompanying it) contain confidential information belonging to the sender.
The information is intended only for the use of the intended recipient. If
you are not the intended recipient, you are hereby notified that any
disclosure, copying, distribution or the taking of any action in reliance on
the contents of the information is strictly prohibited. Any unauthorized
interception of this transmission is illegal under the law. If you have
received this transmission in error, please promptly notify the sender by
reply e-mail, and then destroy all copies of the transmission."
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list
To post a message email: MIDRANGE-L@xxxxxxxxxxxxxxxxxx To subscribe,
unsubscribe, or change list options,
or email: MIDRANGE-L-request@xxxxxxxxxxxxxxxxxx
Before posting, please take a moment to review the archives at
Please contact support@xxxxxxxxxxxxxxxxxxxx for any subscription related
Help support midrange.com by shopping at amazon.com with our affiliate link:
As an Amazon Associate we earn from qualifying purchases.