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Editorial Team
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Asked: 2026-05-15T06:36:22+00:00

I’m running SQL Server 2000. I have a situation where users are timing out.

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I’m running SQL Server 2000.

I have a situation where users are timing out.

In enterprise manager I look at the locks/ProcessIDs.

I see 

   spid 79 (Blocked By 79)

How is it possible for a session to block itself?

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1 Answer

  1. Editorial Team

    This was introduced with Service pack 4 in SQL Server 2000. See this KB article: http://support.microsoft.com/kb/906344 for an explanation

    When an SPID is waiting for an I/O
    page latch, you may notice that the
    blocked column briefly reports that
    the SPID is blocking itself. This
    behavior is a side effect of the way
    that latches are used for I/O
    operations on data pages

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