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Merge pull request #13849 from olgarev/revolg-DOCSUP-997-lock_acquire_timeout_setting

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DOCSUP-997: Documented the lock_acquire_timeout setting
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alexey-milovidov 2020-08-26 03:03:47 +03:00 committed by GitHub
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docs/en/operations/settings/settings.md
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@ -1864,4 +1864,17 @@ Default value: `0`.
- [Synchronicity of ALTER Queries](../../sql-reference/statements/alter/index.md#synchronicity-of-alter-queries)
- [Mutations](../../sql-reference/statements/alter/index.md#mutations)
## lock_acquire_timeout {#lock_acquire_timeout}
Defines how many seconds locking request waits before failing.
Locking timeout is used to protect from deadlocks while executing read/write operations with tables. When timeout expires and locking request fails, the ClickHouse server throws an exeption "Locking attempt timed out! Possible deadlock avoided. Client should retry." with error code `DEADLOCK_AVOIDED`.
Possible values:
- Positive integer.
- 0 — No locking timeout.
Default value: `120`.
[Original article](https://clickhouse.tech/docs/en/operations/settings/settings/) <!-- hide -->