Infrastructure monitoring
Memory monitoring
RAM usage and availability tracking.
Overview
Memory metrics are collected by the Capture agent. The check record includes a memory block with the fields below.
Fields reported
total_bytes— total RAM installedused_bytes— RAM currently allocatedavailable_bytes— RAM available to new allocationsusage_percent— 0–100
Trigger alerts off usage_percent; set the warning and critical cutoffs in Hardware thresholds.
On Linux, used_bytes includes page cache and can look alarmingly high. What matters is available_bytes — if that stays healthy, the kernel will drop cache under pressure and your processes are fine.