Category: News from the Labs

Each month, SOFTWARE ENGINEERING sends out valuable technical DB2 z/OS tips and news based on knowledge gained by the experienced developers and technicians in our product labs. We would like to share this newsletter with other DB2 users, like yourself.

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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2020-01 How RUNSTATS causes an error SQLCODE

How can a Db2 RUNSTATS *cause* an SQL error code? Well, my gentle readers, read on and find ttwo examples in SPUFI

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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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2019-11 Db2 Existence-checks: SELECT for DUMMIES

Find your Db2 backend on any hardware platform with this Db2 Existence checks SQL query examples: SELECT COUNT() FROM SYSIBM.SYSDUMMY1

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2019-10 DECFLOAT examples: Fun with Numbers

Find Db2 Decfloat examples (SNAN, NAN, INF), invalid DECFLOAT and some solutions as CAST or capturing the SQL workload / capturing SQLCODES.

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2019-09 A DBA has got to know his limitations

Know the most important Space limitations in Db2 and how to check them to avoid being out of extend thanks to our real-time space monitor small tool: SAX

2019-08 FTB (Fast Traversal Block): Just another TLA?

Learn how FTB (Fast Traversal Block) supports Db2 Fast Index Traversal (FIT) to allow Index performance optimization and CPU reduction since Db2 12

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2019-06 A little quote from Terry Purcell: it just takes one

One single SQL statement can bring your entire system to its knees: this quote from Terry Purcell is illustrated with a real case at one customer site.

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Machine Learning for Db2 z/OS: Artificial Intelligence – Hype or Reality?

Machine learning for db2 review, now that the Db2 Optimizer has gone all Artificial Intelligent (AI).

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