Hands-On Infrastructure Monitoring with Prometheus

Comparison

The comparison operators, as shown in the following table, are useful for filtering results:

Operator	Description
==	Equal
!=	Not equal
>	Greater than
<	Less than
>=	Greater or equal
<=	Less or equal

Say, for example, we have the following instant vector:

process_open_fds{instance="172.17.0.10:8000", job="hey-service"} 8process_open_fds{instance="172.17.0.11:8000", job="hey-service"} 23

To that, we apply a comparison operator such as the following:

process_open_fds{job="hey-service"} > 10

The result will be as follows:

process_open_fds{instance="172.17.0.11:8000", job="hey-service"} 23

This operation shows that we have effectively filtered the results of the instant vector, which ...