Date: Mon, 04 Jul 2011 11:30:51 +0300 From: Adrian Minta <gygy@stsnet.ro> To: Eugene Grosbein <egrosbein@rdtc.ru> Cc: freebsd-net@freebsd.org Subject: Re: FreeBSD 8.2 and MPD5 stability issues - update Message-ID: <4E117A3B.4070400@stsnet.ro> In-Reply-To: <4E10C97C.2030200@rdtc.ru> References: <f9d8cfb9ee20ba5ab730820fc5c45962.squirrel@mail.stsnet.ro> <4E10C8F3.2050006@rdtc.ru> <4E10C97C.2030200@rdtc.ru>
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On 07/03/2011 10:56 PM, Eugene Grosbein wrote: >> >> There is internal queue of messages in the mpd-5.5 with length 8129. >> Messages are generated based on various events and enqueued there, then processed. >> >> Mpd uses GRED algorithm to prevent overload: it accepts all new L2TP connections >> when queue has 10 or less slots occupied (unprocessed events). >> >> It drops all connections then it has over 60 slots occupied. > s/all/new incoming/ > >> In between, it drops new message with probability equal to (q-10)*2 percents > s/message/L2TP connection/ > >> where q is number of occupied queue slots. These constants are hardcoded in its src/ppp.h >> >> Each time it decided to ignore incoming L2TP requests it notes that in the log, >> as you have already seen. > Eugene Grosbein > > Hi Eugene, if I undestand corectly, in order to increase the connection rate I need to replace 60 with 600 and 10 with 100 like this: #define SETOVERLOAD(q) do { \ int t = (q); \ if (t > 600) { \ gOverload = 100; \ } else if (t > 100) { \ gOverload = (t - 100) * 2; \ } else { \ gOverload = 0; \ } \ } while (0) Is this enough, or I need to modify something else ? -- Best regards,
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