Date: Wed, 3 Feb 2016 00:09:59 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: Alfred Perlstein <alfred@freebsd.org> Cc: Xin LI <delphij@gmail.com>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org>, John Baldwin <jhb@freebsd.org> Subject: Re: svn commit: r295136 - in head: sys/kern sys/netinet sys/sys usr.bin/netstat Message-ID: <20160202210958.GV37895@zxy.spb.ru> In-Reply-To: <56B11323.70905@freebsd.org> References: <201602020557.u125vxCP084718@repo.freebsd.org> <36439709.poT7RgRunK@ralph.baldwin.cx> <56B10D67.4050602@freebsd.org> <CAGMYy3v4s-UQpO3-oq8B1V1NvzyGSmJU49zDUL9oPy21sYkWCQ@mail.gmail.com> <56B11323.70905@freebsd.org>
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On Tue, Feb 02, 2016 at 12:35:47PM -0800, Alfred Perlstein wrote: > > I would second John's comment on the necessity of the change though, > > if one already have 32K of *backlogged* connections, it's probably not > > very useful to allow more coming in. It sounds like the application > > itself is seriously broken, and unless expanding the field have some > > performance benefit, I don't think it should stay. > > Imagine a hugely busy image board like 2ch.net, if there is a single > hiccup, it's very possible to start dropping connections. In reality start dropping connections in any case: nobody will be infinity wait of accept (user close browser and go away, etc). Also, if you have more then 4K backloged connections -- you have problem, you can't process all connections request and in next second you will be have 8K, after next second -- 12K and etc.
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