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Connection Pools: Tomcat

Application server method of pooling and sharing connections to a database.

Extension by Dynatrace

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Product information
Release notes

Overview

Several OneAgent extensions provide insight into connection pool performance and issues such as connection leaks. The extensions cover the following technologies: Apache Tomcat, Oracle WebLogic, IBM WebSphere Application Server, IBM WebSphere Liberty, and Red Hat JBoss and Wildfly.

Use cases

This extension collects connection pool performance, usage and availability metrics for Tomcat.

Prerequisites:

Tomcat process that runs on a supported Linux or Windows operating system.
OneAgent version 1.273+
Dynatrace version 1.273+

To get metric insight:

Install OneAgent on the virtual machine or server of your Tomcat process.
Activate the OneAgent feature Java Metric Extensions 2.0 (JMX).
Select in this same tile Add to environment to configure the extension.
Open the Tomcat Connection Pool Overview dashboard.

Support

Built and supported by Dynatrace

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Extension content

Content typeNumber of items included

metric query

screen metric tables

screen injections

screen chart groups

generic relationship

metric metadata

dashboards

screen layout

list screen layout

generic type

screen entities lists

Feature sets

Below is a complete list of the feature sets provided in this version. To ensure a good fit for your needs, individual metrics can be activated and deactivated by your administrator during configuration.

Feature setsNumber of metrics included

Metric name	Metric key	Description	Unit
Borrowed connections	tomcat.connectionPool.borrowedConnections	-	Count
Reconnected connections	tomcat.connectionPool.reconnectedConnections	-	Count
Released connections	tomcat.connectionPool.releasedConnections	-	Count
Returned connections	tomcat.connectionPool.returnedConnections	-	Count

Metric name	Metric key	Description	Unit
Max active connections	tomcat.connectionPool.maxActive	Maximum amount of active connections allowed concurrently	Count
Max idle connections	tomcat.connectionPool.maxIdle	The maximum number of connections that should be kept in the pool at all times	Count
Max wait time	tomcat.connectionPool.maxWait	The maximum number of milliseconds that the pool will wait (when there are no available connections) for a connection to be returned before throwing an exception	Millisecond
Minimum idle	tomcat.connectionPool.minIdle	The minimum number of established connections that should be kept in the pool at all times	Count

Metric name	Metric key	Description	Unit
Active connections	tomcat.connectionPool.activeConnections	Currently used connections	Count
Created connections	tomcat.connectionPool.createdConnections	Number of connections created	Count
Idle connections	tomcat.connectionPool.idleConnections	Number of open but unused connections	Count
Abandoned connections	tomcat.connectionPool.removeAbandoned	Number of connections that have not been properly released	Count
Abandoned connection timeout	tomcat.connectionPool.removeAbandonedTimeout	Timeout before an abandoned connection can be removed	Second
Waiting connection requests	tomcat.connectionPool.waitCount	Number of connection requests currently waiting	Count

Related to Connection Pools: Tomcat

Apache Tomcat

Automatically and intelligently monitor, analyze, and optimize your application server and all applications deployed anywhere in your stack.

Full version history

To have more information on how to install the downloaded package, please follow the instructions on this page.

ReleaseDate

EF1 to EF2 Tomcat Connection Pool conversion:

Add Tomcat connection pool entity and its relation to the tomcat process
Custom unified analysis screen for Tomcat connection pools
Metric chart injection into Process Group Instance screen
Overview dashboard for Tomcat connection pools
Add feature sets to control included metrics
New metric func:tomcat.connectionPool.availableConnections that shows the current available connections
All metrics have changed key from the EF1 version. The prefix builtin:tech.tomcat has been removed. This is a breaking change for any configuration you had which used the metric key, such as metric events.

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