have you got the server-info turned on ? that might provide a useful idea on whats affecting it. I'm rather concerned if keep alive is making it worse. make sure you set the keep alive timeout as being 10 secs or so as IE has a tendancy to DOS your server given half a chance. You might also want to change from prefork to worker if thats possible. The length of the time of the requests - is that for images or the php pages ? On Tue, 2008-04-01 at 11:07 +0800, James Mandy wrote: > Hi all, new here, > > I administer a bunch of servers for a client who runs a very busy web > site that serve's js, php and images. (what a cocktail!) > > He's serving 300Gig of data a day, and over 30 mil hits a day to this > data which is mainly the images, some flash.. static content > > The server has plenty of cpu, 4Gig ram, RAID, etc. It's fast. During > busy periods, requests are taking a long time. checking the server I > see it's not under much load and there's usually always still 2Gig of > memory free on the machine. I suspect that clients are 'waiting' for > access to apache when the machine is getting a lot of hits. I'm > thinking my configuration is just wrong. > > I'm wondering if there's anyone here who runs a high-traffic server > like ours who might have some experience in tweaking apache for this > kind of work? I'd love to chat with you. We are even willing to pay > for someone to help us dial this baby in if need be. > > I'm happy to discuss the finer details of our infrastructure with > someone that would be willing to help us. Here's a little look at some > of our httpd.conf: > > Timeout 20 > > KeepAlive Off (turning this on seems to make things crawl) > > <IfModule prefork.c> > StartServers 8 > MinSpareServers 15 > MaxSpareServers 20 > ServerLimit 500 > MaxClients 500 > MaxRequestsPerChild 10000 > </IfModule> > > Also getting a lot of this in /var/log/messages: (all the time) > > Mar 29 11:05:57 sls-hc16p2 kernel: possible SYN flooding on port 80. > Sending cookies. > Mar 29 11:05:57 sls-hc16p2 kernel: TCPv6: dropping request, synflood > is possible > > Thanks! James > > --------------------------------------------------------------------- > The official User-To-User support forum of the Apache HTTP Server Project. > See <URL:http://httpd.apache.org/userslist.html> for more info. > To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx > " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx > For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx > --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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