SQL Server Database Administrator Question:
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What is blocking and how would you troubleshoot it?
Answer:
Blocking occurs when two or more rows are locked by one SQL connection and a second connection to the SQL server requires a conflicting on lock on those rows. This results in the second connection to wait until the first lock is released.
Troubleshooting blocking:
► SQL scripts can be written that constantly monitor the state of locking and blocking on SQL Server
► The common blocking scenarios must be identified and resolved.
► The scripts output must be checked constantly,
► The SQL profilers data must be examined regularly to detect blocking.
Troubleshooting blocking:
► SQL scripts can be written that constantly monitor the state of locking and blocking on SQL Server
► The common blocking scenarios must be identified and resolved.
► The scripts output must be checked constantly,
► The SQL profilers data must be examined regularly to detect blocking.
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