<ul><li>The deriv() function in Prometheus calculates how fast a value is increasing or decreasing over time.</li><li>It helps measure the rate of change in gauge values by estimating the slope of the time series using linear regression over a specified time range.</li><li>For instance, using deriv() on a metric like go_memstats_stack_sys_bytes can show how quickly memory usage is changing per second.</li><li>Negative values indicate a decrease in the metric, while positive values indicate an increase, making it useful for monitoring system resources and values that fluctuate.</li></ul>

Prometheus deriv() Function to track How Fast Your Metrics Are Changing

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