BUG #15912: The units of `autovacuum_vacuum_cost_delay` setting should be documented

From: PG Bug reporting form <noreply(at)postgresql(dot)org>
To: pgsql-bugs(at)lists(dot)postgresql(dot)org
Cc: basil(dot)bourque(at)gmail(dot)com
Subject: BUG #15912: The units of `autovacuum_vacuum_cost_delay` setting should be documented
Date: 2019-07-16 16:26:54
Message-ID: 15912-2e35e9026f61230b@postgresql.org
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The following bug has been logged on the website:

Bug reference: 15912
Logged by: Basil Bourque
Email address: basil(dot)bourque(at)gmail(dot)com
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-DELAY

…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.

Responses

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