Again, we turn to enter the area of UNIX and release a new update of our plugin to check memory consumptions en UNIXlike systems, check_unix_mem_usage.

It is vital to our system, have a clear vision of its use of memory. Thus, besides the features already offered by previous versions of our plugin we have made improvements to make checks with greater precision and greater flexibility. The complete set of features of the plugin is as follows:

• It can check not only the overall memory consumption, but also the application memory consumption, the cache consumption and the swap consumption. Nowadays operating systems tend to use the max available memory over disk cache, for this reason, even when the system needs few resources, the memory usage percentages are close to 100%. This is the reason why we consider the total memory consumption a poor indicator.
• It allows checkings based on percentage of total.
• It can use units, Bytes, Kibibytes, Mebibytes, Gibibytes and Tebibytes. Units based on IEEE 1541 standard.
• It support checks based on thresholds or ranges.
• It allows to choose which levels of memory to check.

Also included is an improved functionality. This is the previous lack power used to estimate the percentage allocated to disk cache.

Plugin is Nagios 3.x (ePN) compatible. Attached README file includes plugin related information. It can be downloaded from our website or from Nagios Exchange.