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Update grafana pd dashboard (#3343)
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nolouch authored May 26, 2020
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75 changes: 45 additions & 30 deletions grafana-pd-dashboard.md
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Expand Up @@ -14,38 +14,39 @@ aliases: ['/docs-cn/dev/reference/key-monitoring-metrics/pd-dashboard/']

以下为 PD Dashboard 监控说明:

## Cluster

- PD role:当前 PD 的角色
- Storage capacity:TiDB 集群总可用数据库空间大小
- Current storage size:TiDB 集群目前已用数据库空间大小
- Current storage usage:TiDB 集群存储空间的使用率
- Normal stores:处于正常状态的节点数目
- Number of Regions:当前集群的 Region 总量
- PD scheduler config:PD 调度配置列表
- Region label isolation level:不同 label 所在的 level 的 Region 数量
- Label distribution:集群中 TiKV 节点的 label 分布情况
- Abnormal stores:处于异常状态的节点数目,正常情况应当为 0
- pd_cluster_metadata:记录集群 ID,时间戳和生成的 ID
- Region health:集群所有 Region 的状态。通常情况下,pending 或 down 的 peer 应该少于 100,miss 的 peer 不能一直大于 0,empty Region 过多需及时打开 Region Merge
- Current peer count:当前集群 peer 的总量
- Region health:每个 Region 的状态,通常情况下,pending 的 peer 应该少于 100,miss 的 peer 不能一直大于 0
![PD Dashboard - Header](/media/pd-dashboard-header-v4.png)

![PD Dashboard - Cluster metrics](/media/pd-dashboard-cluster-v2.png)
## Cluster

- PD scheduler config:PD 调度配置列表
- Cluster ID:集群的 cluster id,唯一标识
- Current TSO:当前分配 TSO 的物理时间戳部分
- Current ID allocation:当前可分配 ID 的最大值
- Region label isolation level:不同 label 所在的 level 的 Region 数量
- Label distribution:集群中 TiKV 节点的 label 分布情况
![PD Dashboard - Cluster metrics](/media/pd-dashboard-cluster-v4.png)

## Operator

- Schedule operator create:新创建的不同 operator 的数量
- Schedule operator check:已检查的 operator 的数量,主要检查是否当前步骤已经执行完成,如果是,则执行下一个步骤
- Schedule operator create:新创建的不同 operator 的数量,单位 opm 代表一分钟内创建的个数
- Schedule operator check:已检查的 operator 的次数,主要检查是否当前步骤已经执行完成,如果是,则执行下一个步骤
- Schedule operator finish:已完成调度的 operator 的数量
- Schedule operator timeout:已超时的 operator 的数量
- Schedule operator replaced or canceled:已取消或者被替换的 operator 的数量
- Schedule operators count by state:不同状态的 operator 的数量
- 99% Operator finish duration:99% 已完成 operator 所花费的最长时间
- 50% Operator finish duration:50% 已完成 operator 所花费的最长时间
- 99% Operator step duration:99% 已完成的 operator 步骤所花费的最长时间
- 50% Operator step duration:50% 已完成的 operator 步骤所花费的最长时间
- Operator finish duration:已完成的 operator 所花费的最长时间
- Operator step duration:已完成的 operator 的步骤所花费的最长时间

![PD Dashboard - Operator metrics](/media/pd-dashboard-operator-v2.png)
![PD Dashboard - Operator metrics](/media/pd-dashboard-operator-v4.png)

## Statistics - Balance

Expand All @@ -61,20 +62,32 @@ aliases: ['/docs-cn/dev/reference/key-monitoring-metrics/pd-dashboard/']
- Store leader count:每个 TiKV 实例上所有 leader 的数量
- Store Region count:每个 TiKV 实例上所有 Region 的数量

![PD Dashboard - Balance metrics](/media/pd-dashboard-balance-v2.png)
![PD Dashboard - Balance metrics](/media/pd-dashboard-balance-v4.png)

## Statistics - hot write

- Hot Region's leader distribution:每个 TiKV 实例上成为写入热点的 leader 的数量
- Total written bytes on hot leader Regions:每个 TiKV 实例上所有成为写入热点的 leader 的总的写入流量大小
- Hot write Region's peer distribution:每个 TiKV 实例上成为写入热点的 peer 的数量
- Total written bytes on hot peer Regions:每个 TiKV 实例上所有成为写入热点的 peer 的写入流量大小
- Store Write rate bytes:每个 TiKV 实例总的写入的流量
- Store Write rate keys:每个 TiKV 实例总的写入 keys
- Hot cache write entry number:每个 TiKV 实例进入热点统计模块的 peer 的数量
- Selector events: 热点调度中选择器的事件发生次数
- Direction of hotspot move leader:热点调度中 leader 的调度方向,正数代表调入,负数代表调出
- Direction of hotspot move peer:热点调度中 peer 的调度方向,正数代表调入,负数代表调出

![PD Dashboard - Hot write metrics](/media/pd-dashboard-hotwrite-v4.png)

## Statistics - hotspot
## Statistics - hot read

- Hot write Region's leader distribution:每个 TiKV 实例上是写入热点的 leader 的数量
- Hot write Region's peer distribution:每个 TiKV 实例上是写入热点的 peer 的数量
- Hot write Region's leader written bytes:每个 TiKV 实例上热点的 leader 的写入大小
- Hot write Region's peer written bytes:每个 TiKV 实例上热点的 peer 的写入大小
- Hot read Region's leader distribution:每个 TiKV 实例上是读取热点的 leader 的数量
- Hot read Region's peer distribution:每个 TiKV 实例上是读取热点的 peer 的数量
- Hot read Region's leader read bytes:每个 TiKV 实例上热点的 leader 的读取大小
- Hot read Region's peer read bytes:每个 TiKV 实例上热点的 peer 的读取字节数
- Hot Region's leader distribution:每个 TiKV 实例上成为读取热点的 leader 的数量
- Total read bytes on hot leader Regions:每个 TiKV 实例上所有成为读取热点的 leader 的总的读取流量大小
- Store read rate bytes:每个 TiKV 实例总的读取的流量
- Store read rate keys:每个 TiKV 实例总的读取 keys
- Hot cache read entry number:每个 TiKV 实例进入热点统计模块的 peer 的数量

![PD Dashboard - Hotspot metrics](/media/pd-dashboard-hotspot.png)
![PD Dashboard - Hot read metrics](/media/pd-dashboard-hotread-v4.png)

## Scheduler

Expand All @@ -85,15 +98,15 @@ aliases: ['/docs-cn/dev/reference/key-monitoring-metrics/pd-dashboard/']
- Balance Region event:balance Region 的事件数量
- Balance leader scheduler:balance-leader scheduler 的状态
- Balance Region scheduler:balance-region scheduler 的状态
- Namespace checker:namespace checker 的状态
- Replica checker:replica checker 的状态
- Rule checker:rule checker 的状态
- Region merge checker:merge checker 的状态
- Filter target:尝试选择 Store 作为调度 taget 时没有通过 Filter 的计数
- Filter source:尝试选择 Store 作为调度 source 时没有通过 Filter 的计数
- Balance Direction:Store 被选作调度 target 或 source 的次数
- Store Limit:Store 的调度限流状态

![PD Dashboard - Scheduler metrics](/media/pd-dashboard-scheduler-v2.png)
![PD Dashboard - Scheduler metrics](/media/pd-dashboard-scheduler-v4.png)

## gRPC

Expand All @@ -117,20 +130,22 @@ aliases: ['/docs-cn/dev/reference/key-monitoring-metrics/pd-dashboard/']

## TiDB

- PD Server TSO handle time and Client recv time:从 PD 开始处理 TSO 请求到 client 端接收到 TSO 的总耗时
- Handle requests count:TiDB 的请求数量
- Handle requests duration:每个请求所花费的时间,99% 的情况下,应该小于 100ms

![PD Dashboard - TiDB metrics](/media/pd-dashboard-tidb-v2.png)
![PD Dashboard - TiDB metrics](/media/pd-dashboard-tidb-v4.png)

## Heartbeat

- Heartbeat region event QPS:心跳处理 region 的 QPS, 包括更新缓存和持久化
- Region heartbeat report:TiKV 向 PD 发送的心跳个数
- Region heartbeat report error:TiKV 向 PD 发送的异常的心跳个数
- Region heartbeat report active:TiKV 向 PD 发送的正常的心跳个数
- Region schedule push:PD 向 TiKV 发送的调度命令的个数
- 99% Region heartbeat latency:99% 的情况下,心跳的延迟

![PD Dashboard - Heartbeat metrics](/media/pd-dashboard-heartbeat-v2.png)
![PD Dashboard - Heartbeat metrics](/media/pd-dashboard-heartbeat-v4.png)

## Region storage

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