Identifying Blocked Processes

Priyanka Chouhan talks about identifying and handling blocked processes:

In order to maintain data integrity within the database, locks are used on resources like tables, rows, pages etc. by any process that wishes to use them. This is done to ensure multiple process don’t alter the same resources at one time leading to data inconsistency. When a process wishes to lock a resource, it sends a request to the server and the server grants it. However, when a process requests lock on a resource that has already been locked by another process, the request is denied. The requesting process is thus placed on “hold” until the resource it is requesting for isn’t released. In this situation, the requesting process is called a blocked process, and such a process could put a halt on other subsequent processes and activities scheduled on the server.

Thus identifying a blocked process and releasing it requires a DBA team to check the application database blocking. Additionally, here are some other techniques that may be used to find out which processes are creating a block on the server:

My favorite method, not mentioned, is Adam Machanic’s sp_whoisactive.

Related Posts

Scripting Maintenance Mode Tasks

Jamie Wick shares some hard-earned knowledge regarding scripting out maintenance tasks using Powershell: Given that we have several hundred servers (and growing), this process is taking an increasing amount of time each month. Over the years we’ve implemented various automated patching systems (WSUS, IBM BigFix, etc.) and they’ve worked reasonably well for managing the Download & […]

Read More

Azure Without ARM

Ed Elliott gives us a few ways of deploying Azure resources without using ARM templates: So, what are our options? Create/Edit/Delete ourselves using Powershell/.Net/Python/Go/Java/Some Other SDK Process something else (YAML?) into JSON Generate the ARM using c#/Powershell/something else 3rd party tools, (Terraform is the big daddy) / others include Sparkle Formation To be honest, I’d […]

Read More

Categories

December 2015
MTWTFSS
« Nov Jan »
 123456
78910111213
14151617181920
21222324252627
28293031