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[8.4.x]: SQLStore: Prevent concurrent migrations (#44101) (#45447)

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* SQLStore: Prevent concurrent migrations (#44101)

* SQLStore: Prevent concurrent migrations

* Hide behind a feature toggle

* Configurable locking attempt timeout

* Update docs/sources/administration/configuration.md

Co-authored-by: Igor Suleymanov <radiohead@users.noreply.github.com>
Co-authored-by: achatterjee-grafana <70489351+achatterjee-grafana@users.noreply.github.com>
(cherry picked from commit d718ee1918)

* Resolve dependency cycle (#45427)

(cherry picked from commit 6a38ce2307)
This commit is contained in:
Sofia Papagiannaki
2022-02-16 11:23:54 +02:00
committed by GitHub
parent e43e5c3c42
commit 3d2fbcba2d
18 changed files with 510 additions and 41 deletions
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docs/sources/administration/configuration.md
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@@ -314,6 +314,10 @@ The maximum number of open connections to the database.
Sets the maximum amount of time a connection may be reused. The default is 14400 (which means 14400 seconds or 4 hours). For MySQL, this setting should be shorter than the [`wait_timeout`](https://dev.mysql.com/doc/refman/5.7/en/server-system-variables.html#sysvar_wait_timeout) variable.
### locking_attempt_timeout_sec
For "mysql", if `lockingMigration` feature toggle is set, specify the time (in seconds) to wait before failing to lock the database for the migrations. Default is 0.
### log_queries
Set to `true` to log the sql calls and execution times.