On Sun, Sep 07, 2003 at 06:36:40PM +0200, Niklas Bergh wrote: > Yes, this would be a good idea. Whenever I do memory profiling those accumulators > and connectionbuffers come out as the top consumers. This situation quite > effectively prevents further memory optimizations right now. > > A little note of warning though. In the past (a couple of months back) I saw an > increased frequency of the 'Selector WindowsBug' when my WindowsXP node reached > above 900ish connections. The large amount of occurances of the bug-situation caused > my node to stall.
A related issue: there is, according to rumour, a registry key that can set win98 to use 256 connections (I think that was the maximum that could be done stably). We need the windows installer to set it if necessary and change the config file to have an explicit 128 conn limit. This cannot be easily done from within Fred. > > But, even if this potential isssue exists, I'd say go for it. > > /N > > ---------- Original Message ---------------------------------- > From: Zlatin Balevsky <[EMAIL PROTECTED]> > Reply-To: Discussion of development issues <[EMAIL PROTECTED]> > Date: Sat, 06 Sep 2003 21:54:26 -0400 > > >Seems like the high cpu usage is due mainly to heavy churn of new > >connections being opened on popular nodes. Eventually a feedback loop > >occurs: new connections are being opened to reject queries due to bw > >limits, and those negotiations in turn take up the bandwith causing more > >QRs. > > > >My node receives around 60000 qph. With the default limit of 512 > >connections between 200 and 300 new connections are opened every minute > >(half of them through the ConnectionOpener). I increased my limit to > >1024 connections and for an hour and a half uptime only 800 were used up > >(rtSize=64). The ratio of new connections had dropped to ~70 per > >minute, and cpu usage had therefore gone down significantly. > > > >So... it may be time to do the buffer pooling. It will solve two > >problems with one bullet - the high memory requirements and the high cpu > >usage (as it will allow nodes to have higher number of connections). > >The default of 512 should stay on *nix systems where root privileges are > >required to have more than 1k descriptors. On windoze systems there is > >no limit on the number of sockets, so a more liberal limit can be set. > > > >_______________________________________________ > >Devl mailing list > >[EMAIL PROTECTED] > >http://dodo.freenetproject.org/cgi-bin/mailman/listinfo/devl > > > _______________________________________________ > Devl mailing list > [EMAIL PROTECTED] > http://dodo.freenetproject.org/cgi-bin/mailman/listinfo/devl -- Matthew J Toseland - [EMAIL PROTECTED] Freenet Project Official Codemonkey - http://freenetproject.org/ ICTHUS - Nothing is impossible. Our Boss says so.
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