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system-variables: update from generated source #7289

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Merged
ti-chi-bot merged 3 commits into from
Jan 18, 2022
Merged

system-variables: update from generated source #7289

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system-variables: update from generated source
morgo Dec 17, 2021
7071c16
remove excess whitespace
morgo Dec 17, 2021
7d4d1e7
Fix tidb_store_limit
morgo Dec 17, 2021
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20 changes: 18 additions & 2 deletions system-variables.md
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Expand Up @@ -320,6 +320,22 @@ This variable is an alias for `last_insert_id`.
- Range: `[0, 65535]`
- The port that the `tidb-server` is listening on when speaking the MySQL protocol.

### rand_seed1

- Scope: SESSION
- Default value: `0`
- Range: `[0, 2147483647]`
- This variable is used to seed the random value generator used in the `RAND()` SQL function.
- The behavior of this variable is MySQL compatible.

### rand_seed2

- Scope: SESSION
- Default value: `0`
- Range: `[0, 2147483647]`
- This variable is used to seed the random value generator used in the `RAND()` SQL function.
- The behavior of this variable is MySQL compatible.

### skip_name_resolve <span class="version-mark">New in v5.2.0</span>

- Scope: GLOBAL
Expand Down Expand Up @@ -463,7 +479,7 @@ MPP is a distributed computing framework provided by the TiFlash engine, which a
### tidb_backoff_lock_fast

- Scope: SESSION | GLOBAL
- Default value: `100`
- Default value: `10`
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@TomShawn TomShawn Dec 20, 2021

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@seiya-annie PTAL this default value change. From which version this value has been changed?

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@seiya-annie seiya-annie Dec 30, 2021

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it's still 100 in v5.3.0, maybe a new change for master

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@morgo morgo Jan 12, 2022

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In the checklist at the time there was no option, but I selected master.

This affects TiDB 5.4 and above.

- Range: `[1, 2147483647]`
- This variable is used to set the `backoff` time when the read request meets a lock.

Expand Down Expand Up @@ -1542,7 +1558,7 @@ SET tidb_slow_log_threshold = 200;

### tidb_store_limit <span class="version-mark">New in v3.0.4 and v4.0</span>

- Scope: INSTANCE | GLOBAL
- Scope: GLOBAL
- Default value: `0`
- Range: `[0, 9223372036854775807]`
- This variable is used to limit the maximum number of requests TiDB can send to TiKV at the same time. 0 means no limit.
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