Try these parameters: 1. cat /proc/sys/net/nf_conntrack_max (or similar location) Increase to about 200000 or so if the value is small
2. Increase ulimit values sudo ulimit -n 32768 sudo ulimit -u 32768 Regards, Sid On Fri, Apr 13, 2012 at 10:03 AM, Jorge Román Novalbos <[email protected]>wrote: > If i performance the test again with keep alive, i don't see any TIME_WAIT > connection but the timeouts still happen. > > 1) It was with default configuration 32768 61000, I have set this param > to 1024 65000. > 2) No i always see this behavior. > 3) When I perform the these with less concurrent request and keep alive > on, the report shows that almost all request were served by a keepalive > connection. > > > > > On 13/04/2012, at 11:24, Rohit Karlupia wrote: > > 1) What do you get for cat /proc/sys/net/ipv4/ip_local_port_range ? > 2) Does the TPS decreases over time? Or is it consistent for long time? > 3) Ab does report how many requests used keep alive connection. Check if > that value is significant. ab uses HTTP 1.0, not sure if ATS supports > keep-alive for http 1.0 connections. > > thanks! > rohitk > > On Fri, Apr 13, 2012 at 1:53 PM, Jorge Román Novalbos > <[email protected]>wrote: > >> 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 >>> >>> >>> >>> >> >> > >
