Thanks so much to the needs of our customers and the great acceptance by the community of our plugins, and their continued feedback, we publish the  version 0.4b of our plugin to check memory consumptions en UNIXlike systems, check_unix_mem_usage.

We have extended the features of the plugin to make it more versatility and flexibility. These two new features offer the following qualities:

• Allows to choose whether you want to return in the performance data a metric with maximum system RAM.
• Allows to check the memory based on percentages but get the output in the desired units.

Thanks to these improvements we can make more interesting and comfortable our checks. On the one hand we can obtain performance data that allow us to draw graphs in which we will always have a clear reference to the top of RAM in the system. And on the other hand, we can plan checks on our systems without having to be aware of the existing RAM in each. On the above, for example, we would create a check that returning the memory values ​​in a given unit and establish warning or criticality states based on whether it exceeds the memory usage by 80% or 90%, respectively, allowing expand or reduce the memory available on the system without have to worry about adjusting the thresholds for the check.

The plugin is programmed in Perl and is compatible with Nagios 3.x (Embedded Perl). It comes with a README file in which is described in more detail the operation of this and its requirements. As always, the plugin can be downloaded from our website and more information is available through Nagios Exchange.