Date: Tue, 27 Aug 1996 00:25:20 -0700 From: David Greenman <dg@root.com> To: matthew@scruz.net (Matthew Kaufman) Cc: hackers@freebsd.org, matthew@nic.scruz.net Subject: Re: questions Message-ID: <199608270725.AAA16651@root.com> In-Reply-To: Your message of "Tue, 27 Aug 1996 00:07:48 PDT." <199608270707.AAA20266@scruz.net>
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>1. I have an application (one which, if I finish it, will be given away to > the net community at large) which to provide a huge performance increase > over its former incarnations uses mmap heavily. It doesn't do any other > I/O on the mmap'ed files, but it does do a lot of mmap. The INN lists > indicate that FreeBSD and mmap don't get along, but since I've been > switching the company over to FreeBSD systems (we'd started with NetBSD) > I'd rather just use another one of those to develop and tune this on. > Are these rumors true? Was there a fix? There aren't any specifically know problems with using mmaped files in 2.1.5. We think the problem with INN has to deal with extending a mapped file, and this might be an INN bug in dealing with mmap correctly. >2. I have a FreeBSD 2.1.0 system running Apache 1.0 (with local enhancements) > The system runs out of mb_map every week or so, requiring a reboot. I've > gotten it to last longer by cranking up the map size in the kernel, but > it still dies eventually. Is there a leak somewhere? Probably not. You need to be more specific about how much larger you're making the map (for a busy WWW server, set NMBCLUSTERS=4000). -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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