cc-metric-collector/collectors/numastatsMetric.md

numastat collector

  "numastats": {
    "send_abs_values": true,
    "send_diff_values": true,
    "send_derived_values": true,
    "exclude_metrics": [],
    "only_metrics": []
  }

The numastat collector reads data from /sys/devices/system/node/node*/numastat and outputs a handful memoryDomain metrics. See: https://www.kernel.org/doc/html/latest/admin-guide/numastat.html

Both filtering mechanisms are supported:

• exclude_metrics: Excludes the specified metrics.
• only_metrics: If provided, only the listed metrics are collected. This takes precedence over exclude_metrics.

Metrics are categorized as follows:

Absolute Metrics: (unit: count)

• numastats_numa_hit: A process wanted to allocate memory from this node, and succeeded.
• numastats_numa_miss: A process wanted to allocate memory from another node, but ended up with memory from this node.
• numastats_numa_foreign: A process wanted to allocate on this node, but ended up with memory from another node.
• numastats_local_node: A process ran on this node's CPU, and got memory from this node.
• numastats_other_node: A process ran on a different node's CPU, and got memory from this node.
• numastats_interleave_hit: Interleaving wanted to allocate from this node and succeeded.

Diff Metrics: (unit: count)

• numastats_numa_hit_diff
• numastats_numa_miss_diff
• numastats_numa_foreign_diff
• numastats_local_node_diff
• numastats_other_node_diff
• numastats_interleave_hit_diff

Derived Metrics: (unit: counts/s)

• numastats_numa_hit_rate
• numastats_numa_miss_rate
• numastats_numa_foreign_rate
• numastats_local_node_rate
• numastats_other_node_rate
• numastats_interleave_hit_rate