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faq: add details of watching DDL job progress (#811)

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lilin90 authored and zimulala committed Dec 13, 2018
1 parent 5360242 commit 679305adfec11b932e587e49a98f655fb968c86d
Showing with 13 additions and 2 deletions.
  1. +13 −2 FAQ.md
15 FAQ.md
@@ -913,9 +913,20 @@ Recommendations:
3. Test the `count` in the case of large amount of data.
4. Optimize the TiKV configuration. See [Performance Tuning for TiKV](op-guide/tune-tikv.md).

#### How to view the progress of adding an index?
#### How to view the progress of the current DDL job?

Use `admin show ddl` to view the current job of adding an index.
You can use `admin show ddl` to view the progress of the current DDL job. The operation is as follows:

```sql
tidb> admin show ddl\G;
*************************** 1. row ***************************
SCHEMA_VER: 140
OWNER: 1a1c4174-0fcd-4ba0-add9-12d08c4077dc
RUNNING_JOBS: ID:121, Type:add index, State:running, SchemaState:write reorganization, SchemaID:1, TableID:118, RowCount:77312, ArgLen:0, start time: 2018-12-05 16:26:10.652 +0800 CST, Err:<nil>, ErrCount:0, SnapshotVersion:404749908941733890
SELF_ID: 1a1c4174-0fcd-4ba0-add9-12d08c4077dc
```

From the above results, you can get that the `add index` operation is being processed currently. You can also get from the `RowCount` field of the `RUNNING_JOBS` column that now the `add index` operation has added 77312 rows of indexes.

#### How to view the DDL job?

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