Query plans are dependent upon actual data itself. Plan performance issues can b... | Hacker News

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geekpowa on March 2, 2020 | parent | context | favorite | on: Joe, a Postgres query optimization bot

Query plans are dependent upon actual data itself. Plan performance issues can be difficult to replicate in test envs.

AFAICT, this product relies on LVM snapshots/copy on write : so is ideal diagnosing, trying out ideas on large databases.

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