blocking issues

Question

Hello everyone.

I have blocking issues while using SQL Server and it's bothering me.

How do I fix it?

Any help will be greatly appreciated.

Answer 1

Hi @Joker

SQL Server blocking occurs when one transaction holds a lock on a resource and another transaction requests access to the same resource, causing the second transaction to wait until the lock is released. To prevent blocking in SQL Server, you can follow these best practices:

Keep transactions short: Long-running transactions increase the likelihood of blocking because locks are held for longer periods of time. Try to keep your transactions as short as possible.

Use the appropriate isolation level: The isolation level determines how locks are acquired and released. Use the appropriate isolation level for your application's requirements to avoid unnecessary locks.

Avoid table scans: Table scans acquire locks on entire tables, which can cause blocking. Use indexes to retrieve only the necessary rows.

Use stored procedures: Stored procedures can reduce blocking by minimizing the number of round-trips between the application and the database.

Optimize queries: Poorly written queries can cause blocking by taking longer to execute and holding locks for longer periods of time. Optimize your queries to reduce their execution time.

You can refer to this link.

https://learn.microsoft.com/en-us/troubleshoot/sql/database-engine/performance/understand-resolve-blocking

Best regards,

Percy Tang