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From: PG Bug reporting form <[email protected]>
To: [email protected]
Cc: [email protected]
Subject: BUG #15912: The units of `autovacuum_vacuum_cost_delay` setting should be documented
Date: Tue, 16 Jul 2019 16:26:54 +0000
Message-ID: <[email protected]> (raw)

The following bug has been logged on the website:

Bug reference:      15912
Logged by:          Basil Bourque
Email address:      [email protected]
PostgreSQL version: 12beta2
Operating system:   macOS
Description:        

The `autovacuum_vacuum_cost_delay` setting:

https://www.postgresql.org/docs/devel/runtime-config-autovacuum.html#GUC-AUTOVACUUM-VACUUM-COST-DELA...

…does not specify its units (seconds? milliseconds?) explicitly.  

Previously, one could guess that the units were milliseconds. 

But now in Postgres 12 the argument type changed from `integer` to `floating
point`. So now the units are quite unclear. I am guessing a whole number
means milliseconds, while the fractional part represents microseconds. But
that is only a guess. Should be documented.

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