This article isn’t about the act of lock escalation itself, which is already well documented and generally well understood. Some myths (like row locks escalating to page locks) persist, but challenging those yet again probably wouldn’t change much.
2022-09-19
Reports summaries, in 3 levels of detail, connections, running requests, open transactions + cursors, and blocking. Provides query text + plan for the piggiest running request of each group.
2009-10-26 (first published: 2008-09-18)
6,036 reads
2008-05-16
3,650 reads
One of the issues you'll face with SQL Server is blocking which is caused by other processes that are holding locks on objects. Until the locks are removed on an object the next process will wait before proceeding. This is a common process that runs within SQL Server to ensure data integrity, but depending on how transactions are run this can cause some issues. Are there ways to get around blocking by using different indexes to cover the queries that may be running?
2008-05-02
3,383 reads
Script to log top blocker processes in a database. Top blocker is defined as the process that is at the top of a blocking chain.
2012-07-12 (first published: 2007-10-30)
3,019 reads
2007-10-19 (first published: 2007-07-25)
9,332 reads
A quick little standalone script that tells you what process is blocking and what processes the blocking processing actually blocking.When running this script in QA, change your output to "Results in Text" ( CTRL-T ). Utilizes the blocking info in sp_who2 combined with dbcc inputbuffer and a little cursor to wrap it all up. Formatting […]
2007-04-19 (first published: 2007-03-20)
7,468 reads
spWhatsRunning does just that. It tells you exactly what is executing on your server. By combining the output of the sp_who and dbcc inputbuffer, this script will tell you exactly whats being executed. DBCC INPUTBUFFER will tell you the same thing, but by the time you get the spid, the offending process may be gone. […]
2007-04-17 (first published: 2007-03-20)
2,764 reads
In this article I will try to justify why Table variables are superior to temporary tables.
2006-10-10
1,055 reads
The following script will allow the user to get information from all spids that have a program name associated with them. That is event info out of dbcc inputbuffer. Additional columns may be added and used in the table through simple modifications of the script. I just found it useful for troubleshooting and setting up […]
2006-10-19 (first published: 2006-09-29)
2,349 reads
By Steve Jones
Redgate is a for-profit company. We look to make money by building and selling...
If you've ever loaded a 2 GB CSV into pandas just to run a...
By James Serra
What problem is Fabric Ontology trying to solve? For years, most data conversations have...
Comments posted to this topic are about the item Even When You Know What...
Comments posted to this topic are about the item The New Software Team
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We create the following table and then insert some records in it:
create table t1 ( id int primary key, category char(1) not null, product varchar(50) ); insert into t1 values (1, 'A', 'Product 1'), (2, 'A', 'Product 2'), (3, 'A', 'Product 3'), (4, 'B', 'Product 4'), (5, 'B', 'Product 5');What happens if we execute the following query in both Sql Server and PostgreSQL?
select id,
category,
string_agg(product, ';')
over (partition by category order by id
rows between unbounded preceding and unbounded following) as stragg
from t1; See possible answers