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refactor/improve clarity: change system-table to information-schema #4109
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8e1d491
update information-schema.md
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Merge remote-tracking branch 'upstream/master' into information-schem…
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add commits from https://github.com/pingcap/docs-cn/pull/3470/
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Update information-schema/information-schema-analyze-status.md
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rename cluster-hardware
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rename/update cluster-systeminfo
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rename/update cluster-log
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rename/update metrics-summary and metrics-tables
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rename/update inspection-result
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rename/update inspection-summary
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rename/update metrics-schema.md
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rename/update mysql Schema
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rename/update sql-diagnostics
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Update TOC.md
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Update information-schema.md
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Update faq/deploy-and-maintain-faq.md
yikeke 78accca
Merge branch 'master' into information-schema-updates
yikeke 687aa88
Update faq/deploy-and-maintain-faq.md
yikeke c699293
Update information-schema/information-schema-cluster-config.md
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Merge branch 'master' into pr/4109
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Merge branch 'master' into pr/4109
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lilin90 41dc612
Merge branch 'master' into information-schema-updates
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| --- | ||
| title: ANALYZE_STATUS | ||
| summary: 了解 information_schema 表 `ANALYZE_STATUS`。 | ||
| --- | ||
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| # ANALYZE_STATUS | ||
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| `ANALYZE_STATUS` 表提供正在执行的收集统计信息的任务以及有限条历史任务记录。 | ||
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| {{< copyable "sql" >}} | ||
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| ```sql | ||
| USE information_schema; | ||
| DESC analyze_status; | ||
| ``` | ||
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| ```sql | ||
| +----------------+---------------------+------+------+---------+-------+ | ||
| | Field | Type | Null | Key | Default | Extra | | ||
| +----------------+---------------------+------+------+---------+-------+ | ||
| | TABLE_SCHEMA | varchar(64) | YES | | NULL | | | ||
| | TABLE_NAME | varchar(64) | YES | | NULL | | | ||
| | PARTITION_NAME | varchar(64) | YES | | NULL | | | ||
| | JOB_INFO | varchar(64) | YES | | NULL | | | ||
| | PROCESSED_ROWS | bigint(20) unsigned | YES | | NULL | | | ||
| | START_TIME | datetime | YES | | NULL | | | ||
| | STATE | varchar(64) | YES | | NULL | | | ||
| +----------------+---------------------+------+------+---------+-------+ | ||
| 7 rows in set (0.00 sec) | ||
| ``` | ||
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| {{< copyable "sql" >}} | ||
|
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| ```sql | ||
| SELECT * FROM `ANALYZE_STATUS`; | ||
| ``` | ||
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| ```sql | ||
| +--------------+------------+----------------+-------------------+----------------+---------------------+----------+ | ||
| | TABLE_SCHEMA | TABLE_NAME | PARTITION_NAME | JOB_INFO | PROCESSED_ROWS | START_TIME | STATE | | ||
| +--------------+------------+----------------+-------------------+----------------+---------------------+----------+ | ||
| | test | t | | analyze index idx | 2 | 2019-06-21 19:51:14 | finished | | ||
| | test | t | | analyze columns | 2 | 2019-06-21 19:51:14 | finished | | ||
| | test | t1 | p0 | analyze columns | 0 | 2019-06-21 19:51:15 | finished | | ||
| | test | t1 | p3 | analyze columns | 0 | 2019-06-21 19:51:15 | finished | | ||
| | test | t1 | p1 | analyze columns | 0 | 2019-06-21 19:51:15 | finished | | ||
| | test | t1 | p2 | analyze columns | 1 | 2019-06-21 19:51:15 | finished | | ||
| +--------------+------------+----------------+-------------------+----------------+---------------------+----------+ | ||
| 6 rows in set | ||
| ``` | ||
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| `ANALYZE_STATUS` 表中列的含义如下： | ||
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| * `TABLE_SCHEMA`：表所属的数据库的名称。 | ||
| * `TABLE_NAME`：表的名称。 | ||
| * `PARTITION_NAME`：分区表的名称。 | ||
| * `JOB_INFO`：`ANALYZE` 任务的信息。 | ||
| * `PROCESSED_ROWS`：已经处理的行数。 | ||
| * `START_TIME`：`ANALYZE` 任务的开始时间。 | ||
| * `STATE`：`ANALYZE` 任务的执行状态。其值可以是 `pending`、`running`、`finished` 或者 `failed`。 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| --- | ||
| title: CHARACTER_SETS | ||
| summary: 了解 information_schema 表 `CHARACTER_SETS`。 | ||
| --- | ||
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| # CHARACTER_SETS | ||
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| `CHARACTER_SETS` 表提供[字符集](/character-set-and-collation.md)相关的信息。TiDB 目前仅支持部分字符集。 | ||
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| {{< copyable "sql" >}} | ||
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| ```sql | ||
| USE information_schema; | ||
| DESC character_sets; | ||
| ``` | ||
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| ```sql | ||
| +----------------------+-------------+------+------+---------+-------+ | ||
| | Field | Type | Null | Key | Default | Extra | | ||
| +----------------------+-------------+------+------+---------+-------+ | ||
| | CHARACTER_SET_NAME | varchar(32) | YES | | NULL | | | ||
| | DEFAULT_COLLATE_NAME | varchar(32) | YES | | NULL | | | ||
| | DESCRIPTION | varchar(60) | YES | | NULL | | | ||
| | MAXLEN | bigint(3) | YES | | NULL | | | ||
| +----------------------+-------------+------+------+---------+-------+ | ||
| 4 rows in set (0.00 sec) | ||
| ``` | ||
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| {{< copyable "sql" >}} | ||
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| ```sql | ||
| SELECT * FROM `character_sets`; | ||
| ``` | ||
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| ```sql | ||
| +--------------------+----------------------+---------------+--------+ | ||
| | CHARACTER_SET_NAME | DEFAULT_COLLATE_NAME | DESCRIPTION | MAXLEN | | ||
| +--------------------+----------------------+---------------+--------+ | ||
| | utf8 | utf8_bin | UTF-8 Unicode | 3 | | ||
| | utf8mb4 | utf8mb4_bin | UTF-8 Unicode | 4 | | ||
| | ascii | ascii_bin | US ASCII | 1 | | ||
| | latin1 | latin1_bin | Latin1 | 1 | | ||
| | binary | binary | binary | 1 | | ||
| +--------------------+----------------------+---------------+--------+ | ||
| 5 rows in set (0.00 sec) | ||
| ``` | ||
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| `CHARACTER_SETS` 表中列的含义如下： | ||
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| * `CHARACTER_SET_NAME`：字符集名称 | ||
| * `DEFAULT_COLLATE_NAME`：字符集的默认排序规则名称 | ||
| * `DESCRIPTION`：字符集的描述信息 | ||
| * `MAXLEN`：该字符集存储一个字符所需要的最大字节数 |
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