Re: pgsql: Add kqueue(2) support to the WaitEventSet API.

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Rémi Zara <remi_zara(at)mac(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: pgsql: Add kqueue(2) support to the WaitEventSet API.
Date: 2020-02-24 21:17:09
Message-ID: 20200224211709.GA6996@alvherre.pgsql
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On 2020-Feb-24, Tom Lane wrote:

> Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> writes:

> > Then again, that would be akin to setrlimit() on Linux. Maybe we can
> > consider that a separate GUC, in a separate patch, with a
> > platform-specific default value that just corresponds to the OS's
> > default, and the user can set to whatever suits them; then we call
> > either _setmaxstdio() or setrlimit().
>
> Why not just drive it off max_files_per_process? On Unix, that
> largely exists to override the ulimit setting anyway. With no
> comparable knob on a Windows system, we might as well just say
> that's what you set.

That makes sense to me -- but if we do that, then maybe we should be
doing the setrlimit() dance on it too, on Linux^W^W where supported.

--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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