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Editorial Team
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Asked: 2026-06-01T19:36:08+00:00

During a SSIS load, when an employee table is getting updated, locking comes into

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During a SSIS load, when an employee table is getting updated, locking comes into effect.

However, have disabled lock escalation on the table using the following statements:

  1. ALTER TABLE dbo.Employee SET (LOCK_ESCALATION = DISABLE)
  2. DBCC TRACEON (1211,-1)

However, the table (object) does get locked and is held for almost an hour. The total no. of updates (insert, update, delete statements) are approx 200,000

The ultimate objective here is not really to avoid locking but to successfully allow reads on the table.

The no. of updates (inserts/updates/deletes) are significantly high in the range of 50,000 every day, compared to only about 50-100 search/select queries on the table which are actually getting affected to due the locks.

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1 Answer

  1. Editorial Team

    from BOL:

    SET LOCK_ESCALATION = DISABLE

    Prevents lock escalation in most cases. Table-level locks are not
    completely disallowed. For example, when you are scanning a table that
    has no clustered index under the serializable isolation level,
    Database Engine must take a table lock to protect data integrity.

    Serializable is the default IsolationLevel on SSIS packages (click any blank area on your control flow and check the package’s proprieties).
    Any change your table doesn’t have a clustered index?

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