Monitoring Memcache

This article will help you get the Memcached plugin for sd-agent configured and returning metrics

Installing the memcached plugin package

Install the memcached plugin on Debian/Ubuntu:

sudo apt-get install sd-agent-memcache

Install the memcached plugin on RHEL/CentOS:

sudo yum install sd-agent-memcache

Read more about agent plugins.

Configuring the agent to monitor Memcached

1. Configure /etc/sd-agent/conf.d/mcache.yaml

init_config:

instances:
 - url: localhost # url to connect to the memcached instance

• If memcached runs on a port other than 11211, specify the port in the config file as necessary

2. Restart the agent

Verifying the configuration
Execute info to verify the configuration with the following:

sudo /etc/init.d/sd-agent info 

or

/usr/share/python/sd-agent/agent.py info

If the agent has been configured correctly you'll see an output such as:

memcached
-----
  - instance #0 [OK]
  - Collected * metrics

You can also view the metrics returned with the following command:

sudo -u sd-agent /usr/share/python/sd-agent/agent.py check mcache

Configuring graphs

Click the name of your server from the Devices list in your Server Density account then go to the Metrics tab. Click the + Graph button on the right then choose the memcached metrics to display the graphs. The metrics will also be available to select when building dashboard graphs.

Monitored metrics