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SQL interface to obtain the temporary space usage (tables, hash, sorts...)

A DBA and possibly a programmer needs an easy way to monitor who is responsible for the temporary space usage.
Currently it's possible a user may be consuming a lot of temporary space and impacting other sessions, without the DBA being able to quick and easily identify the session responsible.

Other reports (from IIUG mailing list) and another RFE (36245) mentions the need for programmers to be able to find out the current session's temp tables (onstat -g ses shows this).

The definitive solution for this should be an SQL interface showing:
- session ID
- object name
- object type (explicit temp table, implicit temp table, hash join, sort ...?)
- used space
- chunk/dbspace being used
- owner nam
- ??? (PID and others, but probably thos can be gathered with joins)

This should supersede RFE ID 36245 and this includes the request for that RFE and more.
  • Guest
  • Oct 2 2015
  • Delivered
Client Name IBM
Idea Priority High
  • Guest commented
    16 Oct, 2019 10:09pm

    This was already implemented. There's a "sid" field in sysmaster:sysptnhdr which contains the session ID which created the object if it's a temporary object.
    For previous versions that don't support this (before 12.10.FC8) you can try this script:


    P.S.: An RFE system where a request that is already implemented stays open for nearly 1 year is not credible...

  • Guest commented
    6 Aug, 2019 03:26pm

    There are times when Temp space fills up.
    And there is no way to find out which session is holding all the space.

    I usually look at the onstat -u output, 
    looking for the most read-write counts
    for a session that looks like a reporting session
    And try killing it.

    But it would be really good to actually know which session is responsible.

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