The agent provides two methods to evaluate the state of an Apache HTTP server instance. The first state check is mandatory and the second is optional.

The first check determines the state of the Apache HTTP server. The check determines the state by searching for the existence of the parent httpd daemon. It also searches for at least one child httpd daemon. If the parent process and at least one child do not exist, VCS reports the resource as offline. If they do exist and if the agent attribute LevelTwoMonitorFreq is set, the Apache agent uses the Apache Benchmarking utility "ab" to perform detail monitoring. If the exit code of the "ab" utility is 0 and if the command output contains "Benchmarking HostName", the agent considers the server online, else the agent considers the server offline.

If the binary file ab is not found, Apache agent uses the ab2 binary file for detail monitoring.