Date: Mon, 27 Feb 2017 14:29:09 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: Sepherosa Ziehau <sepherosa@gmail.com> Cc: "freebsd-net@freebsd.org" <net@freebsd.org> Subject: Re: listening sockets as non sockets Message-ID: <20170227112909.GA70430@zxy.spb.ru> In-Reply-To: <CAMOc5cyVKkGMPm840DG7m0eiMjkshzjAvxMgQzPvR0VjQnh4Gg@mail.gmail.com> References: <20170210063024.GE1973@FreeBSD.org> <20170216184903.GF58829@FreeBSD.org> <0858647a-ec3c-1a78-053f-d04397a82d8a@freebsd.org> <20170222232704.GJ8899@FreeBSD.org> <CAMOc5cw7fkrS6LVCwo1hXY459O9p5VdgyfcE4Apkc-kAgQWu7A@mail.gmail.com> <20170223153636.GI15630@zxy.spb.ru> <20170224131349.GJ15630@zxy.spb.ru> <CAMOc5cwcMtHr15dQdaC1DARH2HUXSdHgHA2LOJH-J0YEZk7gww@mail.gmail.com> <20170225155628.GB6035@zxy.spb.ru> <CAMOc5cyVKkGMPm840DG7m0eiMjkshzjAvxMgQzPvR0VjQnh4Gg@mail.gmail.com>
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On Mon, Feb 27, 2017 at 09:36:56AM +0800, Sepherosa Ziehau wrote: > On Sat, Feb 25, 2017 at 11:56 PM, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote: > > On Sat, Feb 25, 2017 at 11:09:29PM +0800, Sepherosa Ziehau wrote: > > > >> > Can I use per-connection Lua script (for delays and url generation)? > >> > Not per-thread. I am need to emulate many client connections (about > >> > 10K-40K). > >> > Currently I am have some trouble w/ >20K connections. > >> > >> I didn't try the Lua script. Make sure to low the MSL on the box > >> running wrk, e.g. 10ms. Well, I'd recommend you to run 15K concurrent > >> connections on one testing box. > > > > Thanks! > > Can you explain some more this recomendations? > > If you don't lower MSL, too many sockets will sit in TIMED_WAIT state > on the testing client, which consumes local port space. Local port > space depletion == wrk can do more requests. > > 15K concurrent connection on each client box is a heuristic to make > sure local ports can be recycled timely. You need to figure out your > value on the testing box. But, normally, 15K ~ 10K is doable on each > client machine for a given server. I see: you talk about tuning for workload w/ bunch connectios/seconds. I am need different workload test: many long lived connection, w/ average transfer on each about 1 mbit/s by requesting files about 600KB (and wait some time between, for effort 1 mbit/s average transfer). > > > > PS: I am run wrk w/ '--connreqs 600' > > Well, nginx's default setting is 100 requests/connection :). I use I am already tuned nginx to keepalive_requests 10000; > --connreqs 1 to generate "short-lived" connection bomb.
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