Kill blocking session in sql server

Blocking in SQL Server occurs when two or more processes require the same resource, but only one process can access a resource at a time. This results in a situation where if one process is using a resource, any subsequent processes will have to wait until the first process has finished using it.

Conditions for Blocking

Blocking in SQL Server occurs when:

• One connection to the SQL Server holds locks on certain resources.
• Another connection requires conflicting locks on those same resources.
• The second connection must wait for the first connection to release its locks before it can proceed.

This waiting period is known as blocking.

It happens because SQL Server uses a lock-based concurrency control system, where resources can only be accessed by one process at a time to maintain data integrity.

One connection can block another connection, no matter whether or not they are from identical applications or separate applications on different client computers.

A few seconds of blocking is normal and avoidable. However, an excessive amount of blocking

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