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  1. #1
    Join Date
    Jan 2002
    Posts
    6

    Unanswered: Detailed Information on Locking Schemes?

    Anybody Know where I can get Down and Dirty(low level) detailed information on how Sybase implements its locking schemes, for 11.9.2?

    I looked at the Performance and Tuning guide but found that it didn't contain the detailed information I was looking for.

    Any help is appreciated,

    TIA,

    Bill

  2. #2
    Join Date
    Mar 2001
    Location
    Lexington, KY
    Posts
    606
    Sybase has several whitepapers (I would assume) on how it works. As an FYI, there are three schemes starting from 11.9.2 and up:
    APL, DPL, DRL;
    All Pages Lock(ed): both the data pages in the table and the index pages (if you have indexes) are locked on modification
    DPL: Data-Page Locking (I think that's the acronym). Data pages are locked.
    DRL: Data-Row locking; Data rows are locked.
    Thanks,

    Matt

  3. #3
    Join Date
    Mar 2001
    Location
    Lexington, KY
    Posts
    606
    I just found this online. It's from an 11.9.2 presentation but the locking still applies to the 12.X platform.

    http://www.sybase.se/download/tk990121pres/sld016.htm
    Thanks,

    Matt

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