When creating a host metric monitor, you can select the following four items to be monitored.

• CPU %
• Memory %
• Swap %
• Filesystem %

These monitors fall under the category metric rate monitor and can be set to be monitored based on information of "metrics sent from mackerel-agent” (system metrics). For metrics in this category, thresholds are specified in "percentage" (with 100% as a whole).

Detailed specifications for the above four items are as follows.

• CPU %
  • Regardless of the number of cores, the 100% - idle% percentage is specified as the threshold when the whole is 100%.
• Memory %
  • The used percentage is specified as a threshold for total.
• Swap %
  • The swap used percentage is specified as a threshold for swap total.
• Filesystem %
  • The used percentage is specified as a threshold for size.
  • When metrics of multiple file systems are posted, the file system with the highest utilization rate and the thresholds are used for comparison.