Prometheus Data Retention Setup Guide

In Prometheus, the data retention policy is set through the retention_time parameter in the configuration file (prometheus.yml). This parameter determines how long data is kept in Prometheus, measured in hours. By default, it is set to 15 days.

To change the data retention policy, you need to modify the numerical value of the retention_time parameter in the configuration file. For example, to set the data retention time to 30 days, you can change the value of the retention_time parameter to 720 hours (30 days x 24 hours).

Example of modified configuration file:

global:
  retention_time: 720h

After making changes to the configuration file, it is necessary to restart the Prometheus service for the changes to take effect. When setting data retention policies in Prometheus, it is important to consider the length of time data is retained to prevent excessive resource consumption due to data accumulation.