your both el5 and el6 Apache status show lots of R -- Reading On Mon, Apr 8, 2013 at 10:24 AM, Banyan He <banyan at rootong.com> wrote: > I did a quick test on el5 and el6 with these package, > > httpd-2.2.3-43.el5.centos > httpd-2.2.15-15.el6.centos.1.i686 > > I kept the configuration as what it is in default. The index page is about > 7k, 100 connections per second. I barely find the connection is marked as > R. Mostly C and _. This is done by ab from httpd. > > I also did a quick test with slow attack. It's basically slowing the > client itself to collect the data from the server. I did 200 connections > per second. My server is ok seems. A little bit slow, but not too much. > > el5 > > RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR > RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR > RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR > RRRRRRRRCWS..................................................... > > el6 > > RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR > RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR > RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR > RRRCRRRRCCCCCCCRWCCCCCWCCCCCCWWCCCCCCCCCCCCCCCCCCCCCCCCCCC...... > > > I also did the capture on the network traffic that I can find out the > connections are doing something bad. You may follow the lead here as I > mentioned. > > > > ------------ > Banyan He > Blog: http://www.rootong.com > Email: banyan at rootong.com > > On 4/7/2013 12:23 AM, linuxsupport wrote: > > There is no problem with the hardware, If I installed CentOS 5 then it > works well, at a time out of total 44 concurrent requests 34 were in > reading state > > > On Sat, Apr 6, 2013 at 2:03 PM, Banyan He <banyan at rootong.com> wrote: > >> I went to the source code to check this. Seems like it's used for >> against the slow request attack from the rate. There is a timeout and rate >> set for header and body. >> >> I'd keep that thought, capture one connection from tcpdump seeing if they >> are doing something bad. If not, you seem need a new server balancing the >> traffic. >> >> ------------ >> Banyan He >> Blog: http://www.rootong.com >> Email: banyan at rootong.com >> >> On 4/6/2013 3:06 PM, linuxsupport wrote: >> >> I have already checked but all requests are from different IP's and >> even different subnet >> When there are less requests it works ok even if there are more than 60% >> reading requests but during peak time when concurrent requests goes beyond >> 150, due to reading requests it becomes 300+ requests processing at the >> same time and that then Apache stop responding as maxclient is set to 300. >> CPU load also goes up and thing become very slow. >> >> >> On Sat, Apr 6, 2013 at 10:33 AM, Banyan He <banyan at rootong.com> wrote: >> >>> I'd recommend you to sort out the connections. Find out if they are >>> coming from the same client or the same subnet of the clients. Doing a >>> simple tcpdump capture to analyze the data seeing if it's a good R or a bad >>> R. >>> >>> Don't really think it's because of the version. >>> >>> ------------ >>> Banyan He >>> Blog: http://www.rootong.com >>> Email: banyan at rootong.com >>> >>> >>> On 4/6/2013 12:24 PM, linuxsupport wrote: >>> >>>> I am facing a problem with Apache on CentOS 6 >>>> >>>> Apache 2.2.19 is complied from source. >>>> >>>> I see so many reading requests in Apache status page, as per my previous >>>> experience this "reading request" issue mainly comes when any of the >>>> internet route having any problem and it request takes time to >>>> completely >>>> reach to Apache, but this time there is no network issue. >>>> >>>> I have ran same setup on CentOS 5 it works well, but on CentOS 6 it show >>>> 60%+ reading requests, web site has 20-25 requests per second that >>>> becomes >>>> 80+ >>>> >>>> I also tried to upgrade Apache to 2.2.24 but it is same on new version >>>> as >>>> well. >>>> >>>> Anyone else has experienced this issue? >>>> _______________________________________________ >>>> CentOS mailing list >>>> CentOS at centos.org >>>> http://lists.centos.org/mailman/listinfo/centos >>>> >>>> >>> >> >> > >