2.1.1 Error detection framework

In a system that uses HA Monitor Kit, a server-monitoring command is used to monitor the active server (Oracle instance or Oracle listener), and HA Monitor detects errors by monitoring the process of this server-monitoring command. When an error is detected, HA Monitor performs hot standby or restart (depending on the setting) in order to continue job execution.

The following figure provides an overview of error detection as performed by the server-monitoring command.

Figure 2-1 Overview of error detection as performed by the server-monitoring command

[Figure]

For Oracle instances, the server-monitoring command provided by HA Monitor Kit monitors status, slowdown, and process operation. For Oracle listeners, the server-monitoring command monitors slowdown and process operation. You specify the monitoring method in the applicable definition control file. For details about how to set up a control definition file, see 3.2.7(2) Setting up control definition files.