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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.mira.net.au!inquo!hookup!uwm.edu!newsfeed.internetmci.com!solaris.cc.vt.edu!news.seanet.com!usenet From: kostya@osd.com Newsgroups: comp.unix.bsd.bsdi.misc Subject: Re: how to increase the number of sockets per process? Date: 7 May 1996 18:20:00 GMT Organization: Seanet Online Services, Seattle WA Lines: 34 Message-ID: <4mo48g$mgv@kaleka.seanet.com> References: <4mlie7$s1d@web1.bga.com> Reply-To: kostya@osd.com NNTP-Posting-Host: ukbar.osd.com In article <4mlie7$s1d@web1.bga.com> dpm@web1.bga.com (David P. Maynard) writes: >In article <4me12t$jpv@kaleka.seanet.com>, <kostya@osd.com> wrote: >>I installed apache 1.0.5 with a patch that BSDI sent me. But the problem seems >>to be not with apache itself but with "select" system call which can't handle >>mode than 256 file descriptors in fd_set. And since apache opens 2 files for >>every virtual host this number goes over 256 when you have over 124 virtual >>hosts (or so). When logging transaction apache calls gethostbyaddr to get a >>host name of the remote host. Gethostbyaddr creates a socket and calls select >>to wait for an answer. And since that socket file descriptor is larger than >>256 select returns an error "Invalid argument". > >I haven't done this under 2.1 yet, but I do have apache serving 130+ >virtual servers under BSD/OS 2.01. For 2.01, you have to make a >kernel patch. I think the kernel problem is supposed to be fixed in >2.1 though. Try recompiling apache with FD_SETSIZE set to a higher >value than 256. Also be sure that the file descriptor limit is set >appropriately. (You must have already tweaked it, or you would have >hit the limit a long time go.) I found the necessary kernel tweak for >2.0X in the archives for one of the BSDI newsgroups. If you need to, >try searching on www.dejanews.com for FD_SETSIZE. This is fixed in 2.1. But I'd rather patch 2.0.1 than upgrade. Recompiling apache will not help, because apache (1.0.5) doesn't use select and FD_SETSIZE at all. Instead resolver library should be recompiled. Number of file descriptors - apache increases it as necessary (up to a system limit). I will look for the patch. Thank you -- Konstantin Martynenko Seanet Corporation