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© 2022 Treasure Data, Inc.
Vacuum with Skip Index Cleanup
• Option to skip index cleanup step of vacuum (introduced by PG 12)
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> Use of this option reduces the ability to reclaim space and can lead to
index bloat, but it is helpful when the main goal is to freeze old tuples.
(from release note)
• Postgres major version upgrade was required to use the option (we used
11)
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Fortunately, we’ve already completed evaluation of 12
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We carefully evaluate compatibility and performance of new
version since upgrade isn’t revertible
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In other production regions, we’ve already used 12
We started test of vacuum with skip index cleanup option
-> Restored DB from snapshot, upgraded to 12 and ran vacuum
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