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reference: refine sql diagnosis. (#2756) #2923

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8 changes: 4 additions & 4 deletions reference/system-databases/cluster-config.md
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Expand Up @@ -6,12 +6,12 @@ summary: 了解 TiDB 集群配置表 `CLUSTER_CONFIG`。

# CLUSTER_CONFIG

集群配置表 `CLUSTER_CONFIG` 用于获取集群当前所有 TiDB/PD/TiKV 节点的配置。对于 TiDB 4.0 以前的版本，用户需要逐个访问各个节点的 HTTP API 才能收集到所有组件配置。
集群配置表 `CLUSTER_CONFIG` 用于获取集群当前所有 TiDB/PD/TiKV 实例的配置。对于 TiDB 4.0 以前的版本，用户需要逐个访问各个实例的 HTTP API 才能收集到所有组件配置。

{{< copyable "sql" >}}

```sql
desc cluster_config;
desc information_schema.cluster_config;
```

```
Expand All @@ -32,12 +32,12 @@ desc cluster_config;
* `KEY`：配置项名。
* `VALUE`：配置项值。

以下示例查询 TiKV 节点的 `coprocessor` 相关配置：
以下示例查询 TiKV 实例的 `coprocessor` 相关配置：

{{< copyable "sql" >}}

```sql
select * from cluster_config where type='tikv' and `key` like 'coprocessor%';
select * from information_schema.cluster_config where type='tikv' and `key` like 'coprocessor%';
```

```
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14 changes: 7 additions & 7 deletions reference/system-databases/cluster-hardware.md
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Expand Up @@ -6,12 +6,12 @@ category: reference

# CLUSTER_HARDWARE

集群硬件表 `CLUSTER_HARDWARE` 提供了集群各节点所在服务器的硬件信息。
集群硬件表 `CLUSTER_HARDWARE` 提供了集群各实例所在服务器的硬件信息。

{{< copyable "sql" >}}

```sql
desc cluster_hardware;
desc information_schema.cluster_hardware;
```

```
Expand All @@ -29,8 +29,8 @@ desc cluster_hardware;

字段解释：

* `TYPE`：对应节点信息表 [`information_schema.cluster_info`](/reference/system-databases/cluster-info.md) 中的 `TYPE` 字段，可取值为 `tidb`，`pd` 和 `tikv`。
* `INSTANCE`：对应于节点信息表 `information_schema.cluster_info` 中的 `INSTANCE` 字段。
* `TYPE`：对应集群信息表 [`information_schema.cluster_info`](/reference/system-databases/cluster-info.md) 中的 `TYPE` 字段，可取值为 `tidb`，`pd` 和 `tikv`。
* `INSTANCE`：对应于集群信息表 `information_schema.cluster_info` 中的 `INSTANCE` 字段。
* `DEVICE_TYPE`：硬件类型。目前可以查询的硬件类型有 `cpu`、`memory`、`disk` 和 `net`。
* `DEVICE_NAME`：硬件名。对于不同的 `DEVICE_TYPE`，`DEVICE_NAME` 的取值不同。
* `cpu`：硬件名为 cpu。
Expand All @@ -45,15 +45,15 @@ desc cluster_hardware;
{{< copyable "sql" >}}

```sql
select * from cluster_hardware where device_type='cpu' and device_name='cpu' and name like '%cores';
select * from information_schema.cluster_hardware where device_type='cpu' and device_name='cpu' and name like '%cores';
```

```
+------+-----------------+-------------+-------------+--------------------+-------+
| TYPE | INSTANCE | DEVICE_TYPE | DEVICE_NAME | NAME | VALUE |
+------+-----------------+-------------+-------------+--------------------+-------+
| tidb | 127.0.0.1:10080 | cpu | cpu | cpu-logical-cores | 8 |
| tidb | 127.0.0.1:10080 | cpu | cpu | cpu-physical-cores | 4 |
| tidb | 0.0.0.0:4000 | cpu | cpu | cpu-logical-cores | 8 |
| tidb | 0.0.0.0:4000 | cpu | cpu | cpu-physical-cores | 4 |
| pd | 127.0.0.1:2379 | cpu | cpu | cpu-logical-cores | 8 |
| pd | 127.0.0.1:2379 | cpu | cpu | cpu-physical-cores | 4 |
| tikv | 127.0.0.1:20160 | cpu | cpu | cpu-logical-cores | 8 |
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20 changes: 10 additions & 10 deletions reference/system-databases/cluster-info.md
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Expand Up @@ -6,12 +6,12 @@ category: reference

# CLUSTER_INFO

集群拓扑表 `CLUSTER_INFO` 提供集群当前的拓扑信息，以及各个节点的版本信息、版本对应的 Git Hash、各节点的启动时间、各节点的运行时间。
集群拓扑表 `CLUSTER_INFO` 提供集群当前的拓扑信息，以及各个节点的版本信息、版本对应的 Git Hash、各节点的启动时间、各实例的运行时间。

{{< copyable "sql" >}}

```sql
desc cluster_info;
desc information_schema.cluster_info;
```

```
Expand Down Expand Up @@ -42,15 +42,15 @@ desc cluster_info;
{{< copyable "sql" >}}

```sql
select * from cluster_info;
select * from information_schema.cluster_info;
```

```
+------+-----------------+-----------------+----------------------------------------+------------------------------------------+---------------------------+--------------+
| TYPE | INSTANCE | STATUS_ADDRESS | VERSION | GIT_HASH | START_TIME | UPTIME |
+------+-----------------+-----------------+----------------------------------------+------------------------------------------+---------------------------+--------------+
| tidb | 127.0.0.1:4000 | 127.0.0.1:10080 | 5.7.25-TiDB-v4.0.0-beta-195-gb5ea3232a | b5ea3232afa970f00db7a0fb13ed10857db1912e | 2020-03-02T16:27:28+08:00 | 4m18.845924s |
| pd | 127.0.0.1:2379 | 127.0.0.1:2379 | 4.1.0-alpha | 4b9bcbc1425c96848042b6d700eb63f84e72b338 | 2020-03-02T16:27:17+08:00 | 4m29.845928s |
| tikv | 127.0.0.1:20160 | 127.0.0.1:20180 | 4.1.0-alpha | 7c4202a1c8faf60eda659dfe0e64e31972488e78 | 2020-03-02T16:27:28+08:00 | 4m18.845929s |
+------+-----------------+-----------------+----------------------------------------+------------------------------------------+---------------------------+--------------+
+------+-----------------+-----------------+-------------+------------------------------------------+---------------------------+--------------+
| TYPE | INSTANCE | STATUS_ADDRESS | VERSION | GIT_HASH | START_TIME | UPTIME |
+------+-----------------+-----------------+-------------+------------------------------------------+---------------------------+--------------+
| tidb | 0.0.0.0:4000 | 0.0.0.0:10080 | 4.0.0-beta | b5ea3232afa970f00db7a0fb13ed10857db1912e | 2020-03-02T16:27:28+08:00 | 4m18.845924s |
| pd | 127.0.0.1:2379 | 127.0.0.1:2379 | 4.1.0-alpha | 4b9bcbc1425c96848042b6d700eb63f84e72b338 | 2020-03-02T16:27:17+08:00 | 4m29.845928s |
| tikv | 127.0.0.1:20160 | 127.0.0.1:20180 | 4.1.0-alpha | 7c4202a1c8faf60eda659dfe0e64e31972488e78 | 2020-03-02T16:27:28+08:00 | 4m18.845929s |
+------+-----------------+-----------------+-------------+------------------------------------------+---------------------------+--------------+
```
34 changes: 17 additions & 17 deletions reference/system-databases/cluster-load.md
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Expand Up @@ -6,12 +6,12 @@ category: reference

# CLUSTER_LOAD

集群负载表 `CLUSTER_LOAD` 提供集群各个节点所在服务器的的当前负载信息。
集群负载表 `CLUSTER_LOAD` 提供集群各个实例所在服务器的的当前负载信息。

{{< copyable "sql" >}}

```sql
desc cluster_load;
desc information_schema.cluster_load;
```

```
Expand All @@ -30,7 +30,7 @@ desc cluster_load;
字段解释：

* `TYPE`：对应于节点信息表 [`information_schema.cluster_info`](/reference/system-databases/cluster-info.md) 中的 `TYPE` 字段，可取值为 `tidb`，`pd` 和 `tikv`。
* `INSTANCE`：对应于节点信息表 `information_schema.cluster_info` 中的 `STATUS_ADDRESS` 字段。
* `INSTANCE`：对应于节点信息表 `information_schema.cluster_info` 中的 `INSTANCE` 字段。
* `DEVICE_TYPE`：硬件类型，目前可以查询的硬件类型有 `cpu`、`memory`、`disk` 和 `net`。
* `DEVICE_NAME`：硬件名。对于不同的 `DEVICE_TYPE`，`DEVICE_NAME` 取值不同。
* `cpu`：硬件名为 cpu。
Expand All @@ -45,21 +45,21 @@ desc cluster_load;
{{< copyable "sql" >}}

```sql
select * from cluster_load where device_type='cpu' and device_name='cpu';
select * from information_schema.cluster_load where device_type='cpu' and device_name='cpu';
```

```
+------+-----------------+-------------+-------------+--------+---------------+
| TYPE | INSTANCE | DEVICE_TYPE | DEVICE_NAME | NAME | VALUE |
+------+-----------------+-------------+-------------+--------+---------------+
| tidb | 127.0.0.1:10080 | cpu | cpu | load1 | 1.94 |
| tidb | 127.0.0.1:10080 | cpu | cpu | load5 | 2.16 |
| tidb | 127.0.0.1:10080 | cpu | cpu | load15 | 2.24 |
| pd | 127.0.0.1:2379 | cpu | cpu | load1 | 1.94 |
| pd | 127.0.0.1:2379 | cpu | cpu | load5 | 2.16 |
| pd | 127.0.0.1:2379 | cpu | cpu | load15 | 2.24 |
| tikv | 127.0.0.1:20160 | cpu | cpu | load1 | 1.94287109375 |
| tikv | 127.0.0.1:20160 | cpu | cpu | load5 | 2.15576171875 |
| tikv | 127.0.0.1:20160 | cpu | cpu | load15 | 2.2421875 |
+------+-----------------+-------------+-------------+--------+---------------+
+------+-----------------+-------------+-------------+--------+-------+
| TYPE | INSTANCE | DEVICE_TYPE | DEVICE_NAME | NAME | VALUE |
+------+-----------------+-------------+-------------+--------+-------+
| tidb | 0.0.0.0:4000 | cpu | cpu | load1 | 0.39 |
| tidb | 0.0.0.0:4000 | cpu | cpu | load5 | 0.36 |
| tidb | 0.0.0.0:4000 | cpu | cpu | load15 | 0.66 |
| pd | 127.0.0.1:2379 | cpu | cpu | load1 | 0.39 |
| pd | 127.0.0.1:2379 | cpu | cpu | load5 | 0.36 |
| pd | 127.0.0.1:2379 | cpu | cpu | load15 | 0.66 |
| tikv | 127.0.0.1:20160 | cpu | cpu | load1 | 0.39 |
| tikv | 127.0.0.1:20160 | cpu | cpu | load5 | 0.36 |
| tikv | 127.0.0.1:20160 | cpu | cpu | load15 | 0.66 |
+------+-----------------+-------------+-------------+--------+-------+
```
22 changes: 11 additions & 11 deletions reference/system-databases/cluster-log.md
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Expand Up @@ -13,19 +13,19 @@ TiDB 4.0 版本之前，要获取集群的日志，用户需要逐个登录各
{{< copyable "sql" >}}

```sql
desc cluster_log;
desc information_schema.cluster_log;
```

```
+----------+---------------------------+------+------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+---------------------------+------+------+---------+-------+
| TIME | varchar(32) | YES | | NULL | |
| TYPE | varchar(64) | YES | | NULL | |
| INSTANCE | varchar(64) | YES | | NULL | |
| LEVEL | varchar(8) | YES | | NULL | |
| MESSAGE | var_string(1024) unsigned | YES | | NULL | |
+----------+---------------------------+------+------+---------+-------+
+----------+------------------+------+------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+------------------+------+------+---------+-------+
| TIME | varchar(32) | YES | | NULL | |
| TYPE | varchar(64) | YES | | NULL | |
| INSTANCE | varchar(64) | YES | | NULL | |
| LEVEL | varchar(8) | YES | | NULL | |
| MESSAGE | var_string(1024) | YES | | NULL | |
+----------+------------------+------+------+---------+-------+
5 rows in set (0.00 sec)
```

Expand All @@ -48,7 +48,7 @@ desc cluster_log;
{{< copyable "sql" >}}

```sql
select * from `CLUSTER_LOG` where message like '%ddl%' and message like '%job%58%' and type='tidb' and time > '2020-03-27 15:39:00';
select * from information_schema.cluster_log where message like '%ddl%' and message like '%job%58%' and type='tidb' and time > '2020-03-27 15:39:00';
```

```
Expand Down
6 changes: 3 additions & 3 deletions reference/system-databases/cluster-systeminfo.md
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Expand Up @@ -6,12 +6,12 @@ category: reference

# CLUSTER_SYSTEMINFO

集群负载表 `CLUSTER_SYSTEMINFO` 用于查询集群所有节点所在服务器的内核配置信息。目前支持查询 `sysctl` 的信息。
集群负载表 `CLUSTER_SYSTEMINFO` 用于查询集群所有实例所在服务器的内核配置信息。目前支持查询 `sysctl` 的信息。

{{< copyable "sql" >}}

```sql
desc cluster_systeminfo;
desc information_schema.cluster_systeminfo;
```

```
Expand Down Expand Up @@ -40,7 +40,7 @@ desc cluster_systeminfo;
查询集群所有服务器的内核版本示例如下：

```sql
select * from CLUSTER_SYSTEMINFO where name like '%kernel.osrelease%'
select * from information_schema.cluster_systeminfo where name like '%kernel.osrelease%'
```

```
Expand Down
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