{
  "uid": "homelab-memory",
  "title": "Homelab 内存与 Swap",
  "schemaVersion": 39,
  "version": 1,
  "tags": [
    "homelab",
    "memory"
  ],
  "timezone": "utc",
  "refresh": "1m",
  "time": {
    "from": "now-6h",
    "to": "now"
  },
  "templating": {
    "list": [
      {
        "name": "DS_VM",
        "label": "数据源",
        "type": "datasource",
        "query": "prometheus",
        "current": {
          "text": "VictoriaMetrics",
          "value": "VictoriaMetrics"
        }
      }
    ]
  },
  "panels": [
    {
      "id": 1,
      "type": "timeseries",
      "title": "主机物理内存",
      "description": "ZFS ARC 是内存的一部分；不能与此面板或 Pod/PSS 再叠加。",
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_VM}"
      },
      "gridPos": {
        "x": 0,
        "y": 0,
        "w": 12,
        "h": 8
      },
      "targets": [
        {
          "refId": "A",
          "expr": "node_memory_MemTotal_bytes{job=\"node-exporter\"} - node_memory_MemAvailable_bytes{job=\"node-exporter\"}",
          "legendFormat": "已用（total - available）"
        },
        {
          "refId": "B",
          "expr": "node_memory_MemAvailable_bytes{job=\"node-exporter\"}",
          "legendFormat": "可用"
        },
        {
          "refId": "C",
          "expr": "node_memory_MemTotal_bytes{job=\"node-exporter\"}",
          "legendFormat": "总量"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "bytes",
          "min": 0
        },
        "overrides": []
      },
      "options": {
        "legend": {
          "displayMode": "table",
          "placement": "bottom",
          "calcs": [
            "lastNotNull"
          ]
        },
        "tooltip": {
          "mode": "multi"
        }
      }
    },
    {
      "id": 2,
      "type": "timeseries",
      "title": "ZFS ARC",
      "description": "缓存可回收性取决于实际压力，ARC 不等同于 free 的 buff/cache。",
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_VM}"
      },
      "gridPos": {
        "x": 12,
        "y": 0,
        "w": 12,
        "h": 8
      },
      "targets": [
        {
          "refId": "A",
          "expr": "node_zfs_arc_size{job=\"node-exporter\"}",
          "legendFormat": "当前 ARC"
        },
        {
          "refId": "B",
          "expr": "node_zfs_arc_c{job=\"node-exporter\"}",
          "legendFormat": "目标"
        },
        {
          "refId": "C",
          "expr": "node_zfs_arc_c_max{job=\"node-exporter\"}",
          "legendFormat": "上限"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "bytes",
          "min": 0
        },
        "overrides": []
      },
      "options": {
        "legend": {
          "displayMode": "table",
          "placement": "bottom",
          "calcs": [
            "lastNotNull"
          ]
        },
        "tooltip": {
          "mode": "multi"
        }
      }
    },
    {
      "id": 3,
      "type": "timeseries",
      "title": "Swap 使用量",
      "description": "",
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_VM}"
      },
      "gridPos": {
        "x": 0,
        "y": 8,
        "w": 12,
        "h": 8
      },
      "targets": [
        {
          "refId": "A",
          "expr": "node_memory_SwapTotal_bytes{job=\"node-exporter\"} - node_memory_SwapFree_bytes{job=\"node-exporter\"}",
          "legendFormat": "已用"
        },
        {
          "refId": "B",
          "expr": "node_memory_SwapTotal_bytes{job=\"node-exporter\"}",
          "legendFormat": "总量"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "bytes",
          "min": 0
        },
        "overrides": []
      },
      "options": {
        "legend": {
          "displayMode": "table",
          "placement": "bottom",
          "calcs": [
            "lastNotNull"
          ]
        },
        "tooltip": {
          "mode": "multi"
        }
      }
    },
    {
      "id": 4,
      "type": "timeseries",
      "title": "Swap 换页速率",
      "description": "单位为页/秒，不假定页大小。",
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_VM}"
      },
      "gridPos": {
        "x": 12,
        "y": 8,
        "w": 12,
        "h": 8
      },
      "targets": [
        {
          "refId": "A",
          "expr": "rate(node_vmstat_pswpin{job=\"node-exporter\"}[5m])",
          "legendFormat": "读入 pages/s"
        },
        {
          "refId": "B",
          "expr": "rate(node_vmstat_pswpout{job=\"node-exporter\"}[5m])",
          "legendFormat": "写出 pages/s"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "ops",
          "min": 0
        },
        "overrides": []
      },
      "options": {
        "legend": {
          "displayMode": "table",
          "placement": "bottom",
          "calcs": [
            "lastNotNull"
          ]
        },
        "tooltip": {
          "mode": "multi"
        }
      }
    },
    {
      "id": 5,
      "type": "timeseries",
      "title": "程序与虚拟机 PSS：前 15",
      "description": "PSS 按共享页比例分摊。vm: 表示 QEMU 在宿主机的占用，不是来宾内部应用占用。与 Pod working set、ARC 不能相加。",
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_VM}"
      },
      "gridPos": {
        "x": 0,
        "y": 16,
        "w": 12,
        "h": 8
      },
      "targets": [
        {
          "refId": "A",
          "expr": "topk(15, namedprocess_namegroup_memory_bytes{job=\"process-exporter\",memtype=\"proportionalResident\"})",
          "legendFormat": "{{groupname}}"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "bytes",
          "min": 0
        },
        "overrides": []
      },
      "options": {
        "legend": {
          "displayMode": "table",
          "placement": "bottom",
          "calcs": [
            "lastNotNull"
          ]
        },
        "tooltip": {
          "mode": "multi"
        }
      }
    },
    {
      "id": 6,
      "type": "timeseries",
      "title": "程序与虚拟机 SwapPss：前 15",
      "description": "通过 smaps 对共享换出页按比例分摊。",
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_VM}"
      },
      "gridPos": {
        "x": 12,
        "y": 16,
        "w": 12,
        "h": 8
      },
      "targets": [
        {
          "refId": "A",
          "expr": "topk(15, namedprocess_namegroup_memory_bytes{job=\"process-exporter\",memtype=\"proportionalSwapped\"})",
          "legendFormat": "{{groupname}}"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "bytes",
          "min": 0
        },
        "overrides": []
      },
      "options": {
        "legend": {
          "displayMode": "table",
          "placement": "bottom",
          "calcs": [
            "lastNotNull"
          ]
        },
        "tooltip": {
          "mode": "multi"
        }
      }
    },
    {
      "id": 7,
      "type": "timeseries",
      "title": "Pod working set：前 15",
      "description": "cgroup working set 与 PSS 口径不同，不相加。",
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_VM}"
      },
      "gridPos": {
        "x": 0,
        "y": 24,
        "w": 12,
        "h": 8
      },
      "targets": [
        {
          "refId": "A",
          "expr": "topk(15, sum by (namespace,pod) (container_memory_working_set_bytes{job=\"cadvisor\",container!=\"\",container!=\"POD\",pod!=\"\"}))",
          "legendFormat": "{{namespace}}/{{pod}}"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "bytes",
          "min": 0
        },
        "overrides": []
      },
      "options": {
        "legend": {
          "displayMode": "table",
          "placement": "bottom",
          "calcs": [
            "lastNotNull"
          ]
        },
        "tooltip": {
          "mode": "multi"
        }
      }
    },
    {
      "id": 8,
      "type": "timeseries",
      "title": "内存压力 PSI",
      "description": "",
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_VM}"
      },
      "gridPos": {
        "x": 12,
        "y": 24,
        "w": 12,
        "h": 8
      },
      "targets": [
        {
          "refId": "A",
          "expr": "rate(node_pressure_memory_waiting_seconds_total{job=\"node-exporter\"}[5m])",
          "legendFormat": "some"
        },
        {
          "refId": "B",
          "expr": "rate(node_pressure_memory_stalled_seconds_total{job=\"node-exporter\"}[5m])",
          "legendFormat": "full"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "percentunit",
          "min": 0
        },
        "overrides": []
      },
      "options": {
        "legend": {
          "displayMode": "table",
          "placement": "bottom",
          "calcs": [
            "lastNotNull"
          ]
        },
        "tooltip": {
          "mode": "multi"
        }
      }
    },
    {
      "id": 9,
      "type": "timeseries",
      "title": "Samba RPC worker 数量",
      "description": "仅在 exporter 健康时将无 worker 解释为 0；见采集健康面板。",
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_VM}"
      },
      "gridPos": {
        "x": 0,
        "y": 32,
        "w": 12,
        "h": 8
      },
      "targets": [
        {
          "refId": "A",
          "expr": "namedprocess_namegroup_num_procs{job=\"process-exporter\",groupname=\"rpcd_lsad\"} or on() (0 * max(up{job=\"process-exporter\"} == 1))",
          "legendFormat": "rpcd_lsad"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "short",
          "min": 0
        },
        "overrides": []
      },
      "options": {
        "legend": {
          "displayMode": "table",
          "placement": "bottom",
          "calcs": [
            "lastNotNull"
          ]
        },
        "tooltip": {
          "mode": "multi"
        }
      }
    },
    {
      "id": 10,
      "type": "timeseries",
      "title": "进程采集健康",
      "description": "up 仅表示抓取成功；还需检查读取错误。进程退出等竞态可能造成偶发 partial errors，持续增长时检查 AppArmor 审计。",
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_VM}"
      },
      "gridPos": {
        "x": 12,
        "y": 32,
        "w": 12,
        "h": 8
      },
      "targets": [
        {
          "refId": "A",
          "expr": "up{job=\"process-exporter\"}",
          "legendFormat": "up"
        },
        {
          "refId": "B",
          "expr": "scrape_duration_seconds{job=\"process-exporter\"}",
          "legendFormat": "scrape 秒"
        },
        {
          "refId": "C",
          "expr": "namedprocess_scrape_errors{job=\"process-exporter\"}",
          "legendFormat": "采集错误"
        },
        {
          "refId": "D",
          "expr": "rate(namedprocess_scrape_partial_errors{job=\"process-exporter\"}[5m])",
          "legendFormat": "部分字段读取失败/s"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "short",
          "min": 0
        },
        "overrides": []
      },
      "options": {
        "legend": {
          "displayMode": "table",
          "placement": "bottom",
          "calcs": [
            "lastNotNull"
          ]
        },
        "tooltip": {
          "mode": "multi"
        }
      }
    }
  ]
}