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Zero-downtime Postgres schema migrations need this: lock_timeout and retries | PostgresAI
https://postgres.ai/blog/20210923-zero-downtime-postgres-schema-migrations-lock-timeout-and-retries
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ddl
database migrations
database schema migrations
zero-downtime changes
Deploying DB schema changes in heavily loaded systems is challenging. In this article, we explore one of the challenges - how to avoid situations when DDLs get blocked, wait to acquire a lock, and during that, start blocking other sessions.
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