Upgrade Meridian

This section outlines the basic steps that you should follow to upgrade to a newer version of Meridian. You may need to complete additional steps to upgrade in a more complex setup (for example, if you run more than one OpenNMS instance, have more complex database migration requirements, and/or depending on the age of current version).

A basic upgrade of one Meridian instance can take about an hour. This time varies, and will be longer depending on how customized and complex your setup is.

Before you begin

There are a number of tasks you should complete before starting an upgrade:

Assess Events Table size

If, after pruning unneeded events, you still have a large number of events, you may need to increase the amount of memory passed to the OpenNMS install tool. For example, if you have 250,000 events, you will need almost 600MB of heap. When you upgrade and have the available memory, choose a large value to pass to the install:

${OPENNMS_HOME}/bin/install -Xms1024m -Xmx2048m -dis