)

var (
	memTotalMD     = NewGaugeMD(memTotal, "Total memory on the node")
	memUsedMD      = NewGaugeMD(memUsed, "Used memory on the node")
	memUsedPercMD  = NewGaugeMD(memUsedPerc, "Used memory percentage on the node")
	memFreeMD      = NewGaugeMD(memFree, "Free memory on the node")
	memBuffersMD   = NewGaugeMD(memBuffers, "Buffers memory on the node")
	memCacheMD     = NewGaugeMD(memCache, "Cache memory on the node")

	sysCPUAvgIOWaitMD = NewGaugeMD(sysCPUAvgIOWait, "Average CPU IOWait time")
	sysCPULoadMD      = NewGaugeMD(sysCPULoad, "CPU load average 1min")
	sysCPULoadPercMD  = NewGaugeMD(sysCPULoadPerc, "CPU load average 1min (percentage)")
	sysCPUNiceMD      = NewGaugeMD(sysCPUNice, "CPU nice time")
	sysCPUStealMD     = NewGaugeMD(sysCPUSteal, "CPU steal time")
	sysCPUSystemMD    = NewGaugeMD(sysCPUSystem, "CPU system time")

message RollingUpdateDaemonSet {
  // The maximum number of DaemonSet pods that can be unavailable during the
  // update. Value can be an absolute number (ex: 5) or a percentage of total
  // number of DaemonSet pods at the start of the update (ex: 10%). Absolute
  // number is calculated from percentage by rounding up.
  // This cannot be 0 if MaxSurge is 0
  // Default value is 1.
  // Example: when this is set to 30%, at most 30% of the total number of nodes

                "result": {
                  "text": "N/A"
                }
              },
              "type": "special"
            }
          ],
          "thresholds": {
            "mode": "percentage",
            "steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          },
          "unit": "dtdurations"
        },

		allDriveLabels...)
	driveWritesAwaitMD = NewGaugeMD(driveWritesAwait,
		"Average time for write requests served on a drive",
		allDriveLabels...)
	drivePercUtilMD = NewGaugeMD(drivePercUtil,
		"Percentage of time the disk was busy",
		allDriveLabels...)
)

func getCurrentDriveIOStats() map[string]madmin.DiskIOStats {
	var types madmin.MetricType = madmin.MetricsDisk

  // +optional
  optional k8s.io.apimachinery.pkg.api.resource.Quantity averageValue = 3;

  // averageUtilization is the target value of the average of the
  // resource metric across all relevant pods, represented as a percentage of
  // the requested value of the resource for the pods.
  // Currently only valid for Resource metric source type
  // +optional
  optional int32 averageUtilization = 4;
}

| `minio_system_drive_perc_util`                 | Percentage of time the disk was busy. <br><br>Type: gauge                               | `drive`, `set_index`, `drive_index`, `pool_index`, `server`        |

#### `/system/memory`

        "uid": "${DS_PROMETHEUS}"
      },
      "description": "",
      "fieldConfig": {
        "defaults": {
          "mappings": [],
          "thresholds": {
            "mode": "percentage",
            "steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          }
        },
        "overrides": []
      },

<img src="/img/deployment/concepts/process-ram.svg">

And of course, the same machine would probably have **other processes** running as well, apart from your application.

An interesting detail is that the percentage of the **CPU used** by each process can **vary** a lot over time, but the **memory (RAM)** normally stays more or less **stable**.

  // +optional
  optional k8s.io.apimachinery.pkg.api.resource.Quantity averageValue = 3;

  // averageUtilization is the target value of the average of the
  // resource metric across all relevant pods, represented as a percentage of
  // the requested value of the resource for the pods.
  // Currently only valid for Resource metric source type
  // +optional
  optional int32 averageUtilization = 4;
}