Reduce SQL Server Blocking with READ_COMMITTED_SNAPSHOT
This article explores how enabling READ_COMMITTED_SNAPSHOT on your SQL Server database might ease excessive blocking.
2024-08-19
Blocking
Understanding Locking, Data Modification and Committing Data in SQL Server
Learn about how SQL Server uses locks when modifying data and how data is committed to a database after data changes.
2023-10-23
Lock Scenarios Using sys.dm_tran_locks
Learn about the impact of locking and blocking in sessions through some demonstrations of different types of actions.
2020-06-11
7,485 reads
Dealing with High Concurrency with Table Hints
Systems with a large number of requests on a critical database table are prone to blocking and slowness. We take a look at getting things done using T-SQL table hints.
2017-06-20
3,599 reads
2015-08-10 (first published: 2015-07-16)
1,541 reads
Figure out the Blocking issue
This script will help you to get the culprit along with IP address and User name which helps us to determine the Blocking root cause.
2015-10-14 (first published: 2013-12-08)
4,388 reads
Blocking Chain (SQL Spackle)
Problems with blocking processes can be easy to identify with SQL Server DMV's.
2013-09-19
7,301 reads
New Custom Metric: Percentage of blocked connections
This metric reports the number of connections that are currently blocked, divided by the total count of current connections.
Most well-balanced SQL Servers will have some degree of blocking. This metric attempts to measure the impact of lead blocking queries against other queries. Higher values indicate that many connections are being blocked, and queries should be tuned to reduce the amount of contention.
2013-06-07
3,144 reads
Identify the Cause of SQL Server Blocking
In this tip, Basit Farooq shares a query written using dynamic management views (DMVs) that will help you to quickly identify SPIDs and other useful information about the processes that are causing blocking on a SQL Server instance.
2013-05-01
6,231 reads
SQL Server Blocking Monitoring
Monitoring blocking can be problematic when you cannot catch it in the act. This article will show you an easy way to configure a SQL Server Profiler Trace to monitor blocking
2011-05-19
12,142 reads
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Question of the Day
Multiple Sequences
In SQL Server 2022, I run this code:
CREATE SEQUENCE myseqtest START WITH 1 INCREMENT BY 1; GO CREATE TABLE NewMonthSales (SaleID INT , SecondID int , saleyear INT , salemonth TINYINT , currSales NUMERIC(10, 2)); GO INSERT dbo.NewMonthSales (SaleID, SecondID, saleyear, salemonth, currSales) SELECT NEXT VALUE FOR myseqtest , NEXT VALUE FOR myseqtest , ms.saleyear , ms.salemonth , ms.currMonthSales FROM dbo.MonthSales AS ms; GO SELECT * FROM dbo.NewMonthSales AS nmsAssume the dbo.MonthSales table exists. If I run this, what happens? See possible answers