mem

Reference for the `mem` collector.

mem · collector · run nanook doc mem for the same content in your terminal.

System memory and swap usage.

Metrics

Metric	Kind	Unit	Description
`mem.total`	numeric	`bytes`	total memory in bytes
`mem.used`	numeric	`bytes`	used memory in bytes
`mem.free`	numeric	`bytes`	free memory in bytes
`mem.available`	numeric	`bytes`	available memory in bytes
`mem.usage`	numeric	`%`	memory usage percentage
`swap.total`	numeric	`bytes`	total swap in bytes
`swap.used`	numeric	`bytes`	used swap in bytes

Examples

Collect every 10s

[[collectors]]
name = "mem"
interval = 10

Low free memory

[[alerts]]
expr = "mem.free < 500MB"
count = 3
channel = "ops"

Memory saturation

[[alerts]]
expr = "mem.usage > 90%"
count = 6               # ~1 minute at 10s interval
channel = "ops"
escalate = { after = 600, channel = "oncall" }

Swap pressure

[[alerts]]
expr = "swap.used > 100MB"
count = 6
channel = "ops"