Schema locking issue

  • Hi all,

    I have a "select * into" process that is loading a table in schema A using data from another server. The problem is that this process blocks other processes that are trying to query (selects, inserts, etc.) the dbo schema. The wait_info for the blocked queries is showing a LCK_M_S wait type. I have googled and read some sites, but I am still not sure why queries against the dbo schema are being blocked and how to resolve it. Any help would be aprpeciated. Thank you.

  • LCK_M_S is not a schema lock, that's just a shared lock on a row/page/table. Sch-M or Sch-S would be your schema locks.

    Can you post more details please? The exact resource being waited for as a bare minimum, the queries themselves are also near-essential.

    Gail Shaw
    Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
    SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

    We walk in the dark places no others will enter
    We stand on the bridge and no one may pass
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