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Date: Fri, 13 Jan 2012 23:42:58 +0100
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Subject: Re: [PHP-DEV] FD_SETSIZE warning?
From: h.reindl@thelounge.net (Reindl Harald)

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Am 13.01.2012 17:36, schrieb Rasmus Lerdorf:
> FD_SETSIZE is a system limit on the number of open files a single
> process can have. From a bash shell type: ulimit -n
> and you will probably see this magical 1024 number pop up. This means
> that the default is 1024 on your system, so raising it in PHP won't
> actually do anything unless you also raise it on your system. We try to=

> match the limit in order to give you a sensible error message instead o=
f
> your program just breaking quietly, or with a warning that doesn't tell=

> you that it is due to hitting a system limit.
>=20
> So, in order to raise this you have to both tell your operating system
> that you want to allow individual processes to open more than 1024 file=
s
> each and you have to recompile PHP with this higher limit.
>=20
> Now, having said that, I don't quite understand why a single PHP cgi
> process would ever need more than 1024 open files at the same time. Wha=
t
> exactly are you doing that needs this many descriptors? Sounds like you=

> have a descriptor leak there somehow.

on "old" sysv-systems it was easy to raise this number
with "modern" systemd-units "LimitNOFILE=3D30000" as example is
ONE simple line to raise this limit

it is not the job of PHP try to GUESS system-limits and
define them on compile-time




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