Re: Enabling archive_mode without restart

Kevin Grittner wrote:
>>>> "Joshua D. Drake" <jd@commandprompt.com> wrote: 
>> It certainly makes more sense to do this:

> archive_mode = off
> archive_command = '/archive/command/used/during/snapshot/backups'
>  
> I could live with diddling the command to control archiving.
>  
> It doesn't log anything extra when archive_mode is on?

Depends on your logging level. I don't know that there is noticeable 
difference between the two in terms of performance. That said, it is 
still silly that we have to handle it in such a hacky way. Frankly, it 
should be a catalog reloption of some sort... "ALTER CATALOG (which 
doesn't exist) archive_mode TO off" but I digress.

>  
> Why is it safer to change archive_command to a no-op on the fly than
> to turn off archive mode?

I think it is because one launches a process that controls another 
process. Just like autovacuum or the logger. You can change what the 
children processes do but not the parent.

Joshua D. Drake


>  
> -Kevin
>