Tag: Tablespace

2020-03 Db2 REORG SYSCOPY: DRAIN Delays are Despicable

REORG and missing SYSCOPY: delays on a Db2 site caused from a DRAIN SQL and a badly timed RUNSTATS. How to identify the bad SQLs thanks to z/OS tools.

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2020-02 Db2 UPDATE column: UPDATEs for nothing and CPU ain’t free!

Db2 UPDATE column: what happens “under the covers” when the column value you are updating is exactly the same as the new value?

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2019-12 Fun with Db2 12 PBR RPN

Avoid runing out of extent during partition in production with the recently enhanced SAX – Space AssuranceExpert thanks to the new PBR – RPN for Db2 12

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2018-01 Db2 GETPAGES by Insert

  Troubleshooting on site : how a simple Db2 SQL INSERT statement causes a high GETPAGES rate and how to fix it. One shop I visit had an interesting problem the other day.  I thought I would share it with

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2017-02 Why SIZE still matters in Db2 12

What has changed for space management in Db2 12? How to avoid SIZE limits in Db2 12 like in previous Db2 Releases? How to monitor the maximum possible SIZE of table and index spaces and table and index partitions? SIZE in

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Rotten Results from RUNSTATS Require Rescue

Do you know the basic rules to ensure access path stability when using RUNSTATS? Time for another of my “I noticed something strange at a customer site recently” newsletters. Enjoy!   RUNSTATS are good aren’t they? At this particular site, the RUNSTATS

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