Re: Vacuuming the operating system documentation

From: Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>
To: Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Vacuuming the operating system documentation
Date: 2020-06-06 07:58:43
Message-ID: cab284ed-1141-f6f8-0644-506ae4066bc7@2ndquadrant.com
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On 2020-06-06 06:57, Thomas Munro wrote:
> We're carrying a bunch of obsolete and in one case insecure advice on
> kernel settings. Here's an attempt to clean some of that up.

These changes seem sensible to me.

> HP-UX:
> * Drop advice for v10. 11.x came out 23 years ago.

We still have a version 10 in the build farm. :)

> It's a bit inconsistent that we bother to explain the SysV shmem
> sysctls on some systems but not others, just because once upon a time
> it was necessary to tweak them on some systems and not others due to
> defaults. You shouldn't need that anywhere now IIUC, unless you run a
> lot of clusters or use shared_memory_type=sysv. I'm not proposing to
> add it where it's missing, as I don't have the information and I doubt
> it's really useful anyway; you can find that stuff elsewhere if you
> really need it.

When this was a serious hurdle on the olden days, we added as much
information as possible. I agree we can trim it now or let it age out.

--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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