The ATS is not going back to the server, but i have a lot of TIME_WAIT connections between ATS and "ab client machine", around 3600 TIME_WAIT connection of 4000.
Any clue? On 13/04/2012, at 09:28, Rohit Karlupia wrote: > Can you verify that ATS is not going back to your servers? > Check netstat output on ATS machine? > - You should only have connections from client to ATS. > - Do you see connections in TIME_WAIT? How many? > > thanks! > rohitk > > > On Fri, Apr 13, 2012 at 12:47 PM, Jorge Román Novalbos <[email protected]> > wrote: > Hi, thank for your answer!! > > 1) I have tried with -k too, and i have timeouts too. > > 2)I don't think that was the problem because I get the same timeout from > different clients from internet. anyway I have 10G internet conexion. > > 3) The ATS server load is very low during the test, never overcome 1. The > request never reach the origin servers because ATS is caching the object, > therefore the req per seconds should be much more high. > 4) I have the same problem with statics objects. My origin servers never > could handle 10000 req/s, therefore I'm interesting in ATS. > 5) Sure! > > I don't know, but I think it's a problem (or setting) of the SO tcp/ip stack. > > Any other idea??? > > > On 13/04/2012, at 08:34, Rohit Karlupia wrote: > >> Multiple things can go wrong..;) >> >> 1) You can use -k option with ab to keep the client connections alive. That >> should be helpful. >> 2) Divide the total bytes transferred by duration of the test to see if you >> are close to bandwidth limits. (100Mbps or 1Gbps) >> 3) Are you maxing out on cpu on ATS or the application server machine? ATS >> is a proxy. It will only add to latency. If the backend server is exhausted, >> you probably need to put more servers and load balance them using ATS to get >> your desired numbers. >> 4) php is process based. What is behind ATS ? Apache? How many processes? >> 5) Are you using caching on ATS? >> >> thanks! >> rohitk >> >> On Fri, Apr 13, 2012 at 1:48 AM, Jorge Román Novalbos <[email protected]> >> wrote: >> Hi everyone!! >> >> I'm configuring a new ATS machine that it gonna server a lot request per >> second (around 10000). >> >> I have done several benchmark with ab from different machine to achieve more >> concurrence but I can't get more than 3000 request per second. >> >> I have set several params in order to improve the performance: >> >> echo "1" > /proc/sys/net/ipv4/tcp_tw_recycle >> echo "1" > /proc/sys/net/ipv4/tcp_tw_reuse >> echo "10" > /proc/sys/net/ipv4/tcp_fin_timeout >> >> echo "10240" > /proc/sys/net/core/somaxconn >> >> Besides, I have increased max open file allowed for nobody user to 16384 >> (User that run ATS) >> >> In the client side always get the same error : >> >> apr_socket_recv: Connection timed out (110) >> >> This is the ab command: >> >> ab -c 600 -t 60 ''http://172.20.10.11/test.php"; >> >> I have increased the limit to 5000 in client side too. >> >> Anybody knows how i can retrieve more concurrence in my server?????? >> >> Thanks in advance!!! >> >> Jorge >> > >
