Re: Units in postgresql.conf

Josh Berkus <josh@agliodbs.com>

From: Josh Berkus <josh@agliodbs.com>
To: Peter Eisentraut <peter_e@gmx.net>
Cc: pgsql-hackers@postgresql.org
Date: 2006-07-20T16:22:02Z
Lists: pgsql-hackers
Peter,

> One frequent source of confusion are the different units that the parameters 
> in postgresql.conf use.  shared_buffers is in 8 kB, work_mem is in 1 kB; 
> bgwriter_delay is in milliseconds, checkpoint_warning is in seconds.  
> Obviously, we can't change that without inconveniencing a lot of users.
> 
> I think it would be useful to allow units to be added to these settings, for 
> example
> 
> shared_buffers = 1000kB
> checkpoint_warning = 30s
> 
> This would also allow
> 
> shared_buffers = 512MB
> 
> which is a bit cumbersome to calculate right now (you'd need = 65536).
> 
> I haven't thought yet how to parse or implement this, but would people find 
> this useful?
> 

Well, it's on my TODO list for 8.2 to write a simple postgresql.conf 
conversion utility in Perl.   If you wanted to make a change like that, 
it would make finishing that mandatory.

Just as well, right now half the vacuum settings are in a different 
section than another half.

--Josh