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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!nntp.coast.net!swidir.switch.ch!in2p3.fr!oleane!tank.news.pipex.net!pipex!usenet.eel.ufl.edu!spool.mu.edu!howland.reston.ans.net!agate!news.mindlink.net!uniserve!usenet From: tom@uniserve.com (Tom Samplonius) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: [Q] INN, ACT_STYLE=MMAP and Shared Active Patch Date: 30 Nov 1995 00:50:51 GMT Organization: UNIServe Online Lines: 35 Distribution: world Message-ID: <49iv5b$np2@atlas.uniserve.com> References: <49fnn1$174@news.ro.com> NNTP-Posting-Host: tapehost.uniserve.com Mime-Version: 1.0 Content-Type: Text/Plain; charset=US-ASCII X-Newsreader: WinVN 0.99.6 In article <49fnn1$174@news.ro.com>, mprevost@ro.com says... > >Is MMAP buggy in FreeBSD like some UNIXes? I heard some rumors to that >effect. Apparently, the msync() call is buggy. Any program that uses msync() to update the disk file will run into problems. >Has anyone successfully (and reliably) used ACT_STYLE=MMAP and/or the >nnrpd shared active patch? Does it really increase performance on a >FreeBSD 2.1.0 system? It just won't work right. Core team has confirmed that mmap stuff has a bug, since at least one has been fixed in -current. There is little performance benefit from it on FreeBSD due to intergrated file and vm system. Shared memory is a different beast altogether. Since lots of X programs use it, without any reported problems it should work fine. >If you have, how much shared memory and stuff did you allow for in your >kernel config file? I would like to support an active file > 1 MB big >(full feed). > >(My INN is working fine without MMAP, BTW -- just trying to be as RAM >conservative as I can.) > >Thanks > >--- Mike R. Prevost > mprevost@ro.com Tom