| From: | Josh Berkus <josh(at)agliodbs(dot)com> |
|---|---|
| To: | Stephen Frost <sfrost(at)snowman(dot)net> |
| Cc: | Bruce Momjian <bruce(at)momjian(dot)us>, Greg Stark <stark(at)mit(dot)edu>, Andres Freund <andres(at)2ndquadrant(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila(at)huawei(dot)com>, Dimitri Fontaine <dimitri(at)2ndquadrant(dot)fr>, pgsql-hackers(at)postgresql(dot)org, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Subject: | Re: Unsafe GUCs and ALTER SYSTEM WAS: Re: ALTER SYSTEM SET |
| Date: | 2013-08-05 18:02:42 |
| Message-ID: | 51FFE8C2.6060101@agliodbs.com |
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| Lists: | pgsql-hackers |
On 08/05/2013 10:49 AM, Stephen Frost wrote:
> Josh, I really have to ask- are these people who are implementing puppet
> to control these configs really clamoring to have an 'ALTER SYSTEM' PG
> command to have to code against instead of dealing with text files? I
> feel like you're arguing for these parameters to be modifiable through
> ALTER SYSTEM on the grounds that these parameters need to be set at some
> point and in some way and not because having them set through ALTER
> SYSTEM actually makes any *sense*.
Nope. ALTER SYSTEM, from my POV, is mainly for folks who *don't* use
Puppet/Chef/whatever. Here's where I see ALTER SYSTEM being useful:
* invididually managed servers with out centralized management (i.e. one
DBA, one server).
* developer machines (i.e. laptops and vms)
* automated testing of tweaking performance parameters
* setting logging parameters temporarily on systems under centralized
management
For that reason, the only way in which I think it makes sense to try to
make ALTER SYSTEM set work together with Puppet/Chef is in the rather
limited context of modifying the logging settings for limited-time data
collection. Mostly, ALTER SYSTEM SET is for systems were people
*aren't* using Puppet/Chef.
--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com