21 May 2018

Query execution reuse

by SQL Monitor Team

3,044 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 shows the percentage of query executions that have been able to reuse execution plans.

Metric definition

Name

Query execution reuse

Description

The percentage of query executions that have been able to reuse cached query plans.

The T-SQL query that will collect data


		
			
			
Transact-SQL
			
			SELECT Sum(CASE WHEN deqs.execution_count > 1 THEN deqs.execution_count ELSE 0 END)
       * 1.00 / Sum(deqs.execution_count) * 100
  FROM sys.dm_exec_query_stats AS deqs
			
				
					
				
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						SELECT Sum(CASE WHEN deqs.execution_count > 1 THEN deqs.execution_count ELSE 0 END)
       * 1.00 / Sum(deqs.execution_count) * 100
  FROM sys.dm_exec_query_stats AS deqs

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 for this metric can be created after establishing a baseline.

3,044 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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Query execution reuse

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