Blocking Sessions
The Blocking Sessions tab displays the current blocking and waiting sessions in a hierarchical display.
In this tab, you can:
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View detailed information about each blocking session, and view sessions blocked by each blocking session.
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Inspect or drill down into the SQL involved, to determine the cause of the blocking.
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Perform several troubleshooting operations, including terminating one or more listed sessions to resolve a waiting session problem.
The hierarchical display nests waiting sessions underneath the session that is blocking them in an easily viewable parent-child relationship. The hierarchy can contain any number of levels to correctly represent the structure of the sessions involved.
The sessions listed include sessions that are waiting for a resource, and sessions that hold a resource that is being waited on that creates a blocking condition.
For more information, see: