Connection Pools: C3P0

Connection Pools: C3P0

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

Extension

Product information
Release notes

Overview

Several built-in 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, Red Hat JBoss and Wildfly, and C3P0.

Use cases

This extension collects connection pool performance, usage and availability metrics for C3P0.

Prerequisites:

Java process that uses C3P0 connection pools that runs on a supported Linux or Windows operating system.
OneAgent version 1.275+
Dynatrace version 1.275+

To get metric insight:

Install OneAgent on the virtual machine or server of your JBoss 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 C3P0 Connection Pool Overview dashboard.

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Extension content

Content typeNumber of items included

screen injections

2

screen metric tables

2

metric metadata

9

screen chart groups

2

generic relationship

1

dashboards

1

screen actions

2

screen layout

1

list screen layout

1

screen entities lists

1

generic type

1

metric query

2

Feature sets

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

Feature setsNumber of metrics included

Metric name	Metric key	Description	Unit
Max Pool Size	c3p0.connectionPool.maxPoolSize	-	Count
Num Connections	c3p0.connectionPool.numConnections	-	Count
Num Busy Connections	c3p0.connectionPool.numBusyConnections	-	Count
Num Unclosed Orphaned Connections	c3p0.connectionPool.numUnclosedOrphanedConnections	-	Count

Metric name	Metric key	Description	Unit
Num Idle Connections	c3p0.connectionPool.numIdleConnections	-	Count
Num Active threads	c3p0.connectionPool.threadPoolNumActiveThreads	-	Count
Thread Pool Size	c3p0.connectionPool.threadPoolSize	-	Count

Full version history

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

ReleaseDate

Full version history

First version of the extension. It includes:

9 metrics, 2 of which are calculated, split up into 2 feature sets
1 generic entity type (c3p0 connection pool)
1 relationship between the connection pool and the process
Screen for the generic type and injections for the host and process group instance
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