Troy Coleman

Troy L Coleman




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Recent Posts

  • IBM Redbook: Db2 12 for z Optimizer
    05/22/2018
  • Extended Plan Management and Migration
    05/15/2018
  • Submitting an RFE
    05/08/2018
  • Db2 12 for z/OS Tools Compatibility
    05/01/2018
  • Additional Support for JSON
    04/24/2018
  • New Function Level 501: Continuous Delivery Makes its First Delivery

    Db2 12 introduces continuous delivery. Making it possible for customers to rapidly put new features into production through normal maintenance is huge for the mainframe's continued viability. Businesses will now have a more positive view of running applications on DB2 for z/OS because they know they'll no longer have to wait years for required features.

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    Posted: August 08, 2017 |

    Db2 12 Automated Statistics Collection

    Terry Purcell, who leads the Db2 Optimizer team, recently told me that at least 80 percent of all SQL access path performance problems reported to IBM could be avoided if customers had collected proper runstats.

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    Posted: August 01, 2017 |

    The New z/14 and Pervasive Encryption

    Last week IBM unveiled the newest mainframe system--the z14. As noted in the announcement letter, the z14 is intended to provide the cornerstone for the "trust economy."

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    Posted: July 25, 2017 |

    A Happy 10 Years

    Ten years ago this week--July 16, 2007, to be specific--this blog published its first post, on Universal Table Space. IBM Systems Magazine had asked me if I would consider writing a blog about Db2 for z/OS. I'm not exaggerating when I say I felt like the luckiest guy in the world.

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    Posted: July 18, 2017 |

    Db2: A Small but Significant Change

    If you scan IBM websites, or you're on Twitter looking for news about Db2, or you're following those who have a hand in its direction, you may have noticed something: DB2 is now Db2. The b is lower-case.

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    Posted: July 11, 2017 |

    Subsystem Parameter Changes in DB2 12

    Following up on last week's post about new and changed with DB2 11 for z/OS subsystem parameters, here's an update about DB2 12 zparms. It’s important to note that, starting with DB2 12, zparms become available at function level at which they're introduced (e.g., function level V12R1M500, V12R1M501, etc.).

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    Posted: June 27, 2017 |

    New and Changed Subsystem Parameters in DB2 11

    Even though DB2 12 is now available, a fair number of customers are now or have recently migrated from DB2 10 to DB2 11. I know this because I've been getting queries about subsystem parameters (zparms) default changes in DB2 11. So I'll share with you what I've been telling them: IBM, thankfully, documents this information in the Knowledge Center's What’s New guide.

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    Posted: June 20, 2017 |

    MERGE Statement Enhancements in DB2 12

    The MERGE statement has been around awhile. It was actually among the first topics I covered upon launching DB2utor in 2007.

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    Posted: June 13, 2017 |

    DB2 12 Technical Workshops

    Many customers have asked when IBM will offer DB2 12 for z/OS education and training. The answer is "very soon." IBM is hosting six one-day workshops around the U.S. in June and July.

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    Posted: June 06, 2017 |

    DB2 Tools Fix Lists

    The IBM Support page lists all fixes for DB2 and IMS tools products. You'll find summaries of problem descriptions (APARs) and fixes (PTFs), by product and version. The list of APARs can be downloaded as a CSV file and imported into a spreadsheet or database for sorting and filtering.

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    Posted: May 30, 2017 |

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