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Status Delivered
Workspace IBM i
Categories Db2 for i
Created by Guest
Created on Nov 12, 2020

RELATED IDEAS

Enhance Performance of USER_INFO DB2 SQL View

See this idea on ideas.ibm.com

The QSYS2.USER_INFO SQL View is nice to have. However, the performance on systems with thousands or even hundreds of User Profiles means a lot of waiting. Providea faster version of USER_INFO that returns only the User Profile Info and not the OBJECT_STATISTICS stuff.


Use Case:

I rarely need the info provided with the extra data from OBJECT_STATISTICS that is returned with USER_INFO and yet I still have to wait for it.

Certainly when there are "20 or fewer" User Profiles on the system, the performance seems great, but with hundreds or more, it can sit for 20 to 30+ seconds before responding.

I assume this is because of a LATERAL join to the OBJECT_STATISTICS UDTF is performed for each returned User Profile. Ironically you use OBJECT_STATISTICS to build the *ALLSIMPLE list of USRPRF objects but then do the lateral join to pull in the full object information. This is on top of the LATERAL join to the internal UDTF that returns the User Profile info.

This request asks that a 2nd VIEW be created that avoids calling and avoids returning OBJECT_STATISTICS information for each user profile.

My actual preference would be to expose the internal UDTF used by the UDTF as a published/documented "Services" UDTF rather than spend centuries waiting on a VIEW to return information.


Idea priority Medium
  • Guest
    Reply
    |     May 13, 2021

    This enhancement was delivered in spring 2021 with IBM i 7.4 PTF Group level 13 and IBM i 7.3 PTF Group level 24.

    A new view, QSYS2.USER_INFO_BASIC, returns the key information from USER_INFO while eliminating the additional information gathered from OBJECT_STATISTICS. For a system with many user profiles, this view is significantly faster.

  • Guest
    Reply
    |     Nov 18, 2020

    IBM will use this request as input to planning but no commitment is made or implied. This request will be updated in the future if IBM implements it.

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