21 May 2018

Percentage of ad-hoc queries

by SQL Monitor Team

6,150 0 Performance

Metrics install automatically if you have Redgate Monitor installed.

If you are using Redgate’s SQL Server monitoring tool, Redgate Monitor, you can instantly install and run this metric on your servers.

This metric will display the percentage of queries on the server that are ad-hoc queries. A high percentage of ad-hoc queries can indicate that an application is running queries that are not properly parameterized.

Metric definition

Name

Percentage of ad-hoc queries

Description

This metric displays the percentage of queries being run on the server that are ad-hoc queries.

The T-SQL query that will collect data


		
			
			
Transact-SQL
			
			SELECT Convert(INT,
                Sum(CASE p.objtype WHEN 'Adhoc' THEN 1 ELSE 0 END) * 1.00
                / Count(*) * 100
              )
  FROM sys.dm_exec_cached_plans AS p
			
				
					
				
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						SELECT Convert(INT,
                Sum(CASE p.objtype WHEN 'Adhoc' THEN 1 ELSE 0 END) * 1.00
                / Count(*) * 100
              )
  FROM sys.dm_exec_cached_plans AS p

Instances to collect from

All

Databases to collect from

All

Collection frequency

Use collected or calculated values

Leave the Use a calculated rate of change between collections check box unchecked

Metric collection

Enabled

Alert definition

An alert can be set for this metric once a baseline has been established.

6,150 Rate

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What are custom metrics?

The Redgate Monitor custom metric feature lets you run T-SQL queries against your SQL Servers to collect specific data. You can analyze and receive alerts about your custom data just like everything else Redgate Monitor collects.

But what if you don’t want to write your own queries? No problem. Redgate has brought together a range of quality custom metrics for you to use in Redgate Monitor, which are all are free, tried and tested. You can install straight away, and use the resources on this site to help you write your own.

What is Redgate Monitor?

Redgate Monitor is a SQL Server performance monitoring tool that gives you real-time and historical SQL Server performance data with alerts and diagnostics.

With its embedded expertise from SQL Server experts and MVPs, it gives you the information and advice you need to find and fix issues before users are even aware.

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Percentage of ad-hoc queries

Metric definition

Name

Description

The T-SQL query that will collect data

Instances to collect from

Databases to collect from

Collection frequency

Use collected or calculated values

Metric collection

Alert definition

What are custom metrics?

What is Redgate Monitor?

Featured custom metrics

Total database file size

Number of active backups and restores

Full backup to odd path

Find metrics