Configuration

You can take a look at the structure of the WhaTap agent, set additional functions through various options, and monitor the resources of the DB server to be monitored.

Agent structure

The following displays the WhaTap agent's structure map.

• Collection server

  It collects and stores the database performance data collected by agents, extracts statistical data, and efficiently provides them to users. The collection server can be set by region. Different collection server addresses are allocated to each region. The collection server address may differ depending on the selected region. When creating a project, the region is also set.

• DMX agent

  Collects performance data using the DMA (Direct Memory Access) method and sends it to the collection server. The agent is installed directly on the target database server.

• Network: The WhaTap monitoring agent uses the external communication (TCP) port 6600 to transfer the collected monitoring data to the WhaTap collection server.

prx process options

The prx process monitors the dmx process and restarts it when it is abnormally crashed or excessive CPU or memory is used. You can set the reboot criteria through the following options:

prx.conf

cpu_limit=10
mem_limit=500000 

• cpu_limit

  Default 10 (unit: %)

  Restarts the dmx process if the CPU utilization exceeds the specified value.

• mem_limit

  Default 500000 (500 MB, unit: KB)

  Restarts the dmx process if the memory usage exceeds the specified value.