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sql: Default tidb_ddl_reorg_priority is slow #610

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Sep 9, 2018
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sql: Default tidb_ddl_reorg_priority is slow #610

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51e22c7
Default tidb_ddl_reorg_priority is slow
morgo Sep 8, 2018
9eb7d9e
Fix incorrect indent level
morgo Sep 9, 2018
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10 changes: 5 additions & 5 deletions sql/tidb-specific.md
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Expand Up @@ -257,28 +257,28 @@ set @@global.tidb_distsql_scan_concurrency = 10
- Default: 0
- This variable is used to set whether to disable automatic retry of explicit transactions. If you set this variable to 1, the transaction does not retry automatically. If there is a conflict, the transaction needs to be retried at the application layer. To decide whether you need to disable automatic retry, see [description of optimistic transactions](transaction-isolation.md#description-of-optimistic-transactions).

## tidb_enable_table_partition
### tidb_enable_table_partition

- Scope: SESSION
- Default value: 0
- This variable is used to set whether to enable the `TABLE PARTITION` feature.

## tidb_backoff_lock_fast
### tidb_backoff_lock_fast

- Scope: SESSION | GLOBAL
- Default value: 100
- This variable is used to set the `backoff` time when the read request meets a lock.

## tidb_ddl_reorg_worker_cnt
### tidb_ddl_reorg_worker_cnt

- Scope: SESSION | GLOBAL
- Default value: 16
- This variable is used to set the concurrency of the DDL operation in the `re-organize` phase.

## tidb_ddl_reorg_priority
### tidb_ddl_reorg_priority

- Scope: SESSION | GLOBAL
- Default value: `PRIORITY_NORMAL`
- Default value: `PRIORITY_LOW`
- This variable is used to set the priority of executing the `ADD INDEX` operation in the `re-organize` phase.
- You can set the value of this variable to `PRIORITY_LOW`, `PRIORITY_NORMAL` or `PRIORITY_HIGH`.

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