Troy Coleman

Troy L Coleman

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Recent Posts

  • A Happy 10 Years
  • Db2: A Small but Significant Change
  • Subsystem Parameter Changes in DB2 12
  • New and Changed Subsystem Parameters in DB2 11
  • MERGE Statement Enhancements in DB2 12
  • DB2 12 Webinar Series

    I recently spent two weeks at the IBM Silicon Valley Lab (SVL) learning all about DB2 12 for z/OS. During the second week, I met with customers who participated in the DB2 12 Early Support Program (ESP). It was very exciting to learn first-hand from the developers who worked on DB2 12, and it was also nice to hear all the positive feedback from the customers. Having this level of access is one of the best things about my job with IBM. I feel very fortunate.

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    Posted: February 21, 2017 |

    DB2 12 Plan Stability with APREUSESOURCE

    During a migration, DB2 12 will automatically rebind any package bound in DB2 9 and earlier versions. The automatic rebind results in a new package, while the previous package copy is automatically discarded. However, to ensure plan stability, a BIND should be done manually, because auto rebind won't copy the original package to the previous one. So if a regression in access path occurs, the REBIND SWITCH option is not available.

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    Posted: February 16, 2017 |

    Administrative and Install Level Authorities

    One big change in DB2 12 is the new install SYSOPR authority. Using install SYSOPR instead of SYSADM allows systems programmers to install or migrate DB2 without having access to user objects and user data.

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    Posted: February 07, 2017 |

    DB2 12 REORG Enhancements

    The REORG utility is one of the most important tools in the DBA toolbox. Traditionally, the REORG table space or index utility is used to reorganize the data to improve access performance as well as reclaim fragmented space.

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    Posted: January 31, 2017 |

    DB2 12 Table Space with Relative Page Numbers

    In my career as a DBA, I’ve done a lot work working around table space size limits. Managing this involves resizing, rebalancing, adding partitions, and much more. With this perspective, I can assure you that the dramatically increased partition sizes allowed in DB2 12 are a big deal.

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    Posted: January 24, 2017 |

    DB2 12 for z/OS Technical Overview

    I don't need to tell you that a career working with DB2 for z/OS is never boring. DB2 for z/OS continues to evolve at an ever-increasing pace. To help you keep up with all these changes, IBM has delivered a new Redbook, "DB2 12 for z/OS Technical Overview."

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    Posted: January 17, 2017 |

    DB2 for z/OS Native RESTful Services in DB2 11 & 12

    I’ve previously written about RESTful services, noting how these services will enable data and applications running on DB2 for z/OS to become a strategic component of your enterprise API strategy.

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    Posted: January 10, 2017 |

    Comparing DB2 12 Function Levels M100 and M500

    I was recently reading the DB2 12 for z/OS What’s New guide. It's interesting comparing the features available in the initial Function Level M100 with what you can get when you activate Function Level M500.

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    Posted: January 03, 2017 |

    Deprecated Functions: A Primer

    When IBM decides to remove a function from DB2 for z/OS (or any DB2 offering), it's generally publicized in in the DB2 for z/OS announcement letter. See the DB2 12 for z/OS announcement letter, for instance.

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    Posted: December 20, 2016 |

    Monitoring Index Cleanup Threads

    I was recently asked about activating a trace that sends information about DB2 11 index cleanup threads to the IBM System Management Facility (SMF).

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    Posted: December 13, 2016 |

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