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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.cs.su.oz.au!metro!metro!asstdc.scgt.oz.au!nsw.news.telstra.net!act.news.telstra.net!vic.news.telstra.net!news.mira.net.au!inquo!vyzynz!news.dacom.co.kr!usenet.seri.re.kr!news.cais.net!van-bc!unixg.ubc.ca!rover.ucs.ualberta.ca!news.nl2k.edmonton.ab.CA!news.nl2k.edmonton.ab.CA!not-for-mail From: doctor@nl2k.edmonton.AB.ca (The Doctor) Newsgroups: comp.unix.bsd.bsdi.misc Subject: Re: how to increase the number of sockets per process? Date: 2 May 1996 06:35:11 -0600 Organization: NetLine 2000 Lines: 41 Message-ID: <4maa5v$ng@doctor.nl2k.edmonton.ab.ca> References: <4m89qp$lpd@kaleka.seanet.com> NNTP-Posting-Host: doctor.nl2k.edmonton.ab.ca In article <4m89qp$lpd@kaleka.seanet.com>, <kostya@osd.com> wrote: >We have an interesting problem with Apache 1.0.3 on BSDI 2.0.1. After we added >our 125th virtual server apache stopped doing reverse DNS lookups. All apache >transactions are now logged with ip addresses and not host names. Other >programs on the same machine do reverse lookups fine at the same time. It seems >to be some per process limitation. If I run "tcpdump udp port domain" I see >that every http request generates 4 PTR lookups in rapid succession to each DNS >server listed in resolv.conf. Then I see replies coming back. If I turn on >queries logging on DNS I see the same thing. Nothing wrong with DNS servers. >"netstat -p udp" on apache server shows this: > > 111368 datagrams received > 0 with incomplete header > 0 with bad data length field > 0 with bad checksum > 109112 dropped due to no socket > 0 broadcast/multicast datagrams dropped due to no socket > 0 dropped due to full socket buffers > 2256 delivered > 111612 datagrams output > >I guess all replies are "dropped due to no socket". Looks like it has enough >sockets to send queries, but not enough to get replies. I tried "limit >descriptors 256" or more and then restarted apache. Didn't help. OTOH it >doesn't have a problem with answering incoming TCP (HTTP) connections or >logging transactions for all virtual servers. It seems to be the problem only >with datagram sockets. > >Is there any kernel parameter that should be increased? > >Thank you >-- >Konstantin Martynenko >Seanet Corporation Question: Is this the SAME 1.0.3 available at nl2k and/or BSDI? -- God, Queen and Country Member - Liberal International NEVER Satan, President and Republic Board Member - Edmonton Heritage Nazarene Hating Bachelor's Living; Doctor Who returns: 13 May at BAFTA for DWAS, 14 May on Fox for NA, 27 May on BBC1 - check rec.arts.drwho for local gatherings http://doctor.nl2k.edmonton.ab.ca/~doctor British Columbia, beware of Van Der Zalm Reform and Harcourt/Clark NDP on 28 May VOTE Liberal!!