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Re: Nginx TCP Delays

Khalid Shaikh
September 24, 2009 11:22AM
Chris,
Actually Paytam resolved the problem, the fix was.

It was simply amazing.

Best,
Khalid

violet2:~# cat README_PLEASE
Hi There,

This is Payam, i fixed your system by modifying your nf_conntrack max
setting as well as its h
ash bucket size. Since you are using connection tracking via
iptable, you need to
make sure to modify the settings else you will have issues such as the one
reported =)

i created a payam-tune.sh file that has the 2 main commands you need
i also tuned the system slightly by making sure the proper sysctl.conf
options were selected

i no longer can experience the issue you were having before
one quick way for figuring out if your system is erroring out anywhere is by
using "dmsg" comm
and on the command line

I also installed chkrootkit for you, in case your system was compromised. id
recomend installi
ng rkhunter 'apt-get install rkhunter'
I have also created you a test script to test your site, called
wget-test.sh.

cheers
Payam
pchychi@gmail.com
violet2:~# cat payam_tune.sh
# payam - pchychi
*echo 1048576 > /proc/sys/net/ipv4/netfilter/ip_conntrack_max*
*modprobe ip_conntrack hashsize=1048576*
violet2:~#


On Thu, Sep 24, 2009 at 12:44 AM, Christopher Smith <x@xman.org> wrote:

> Avleen Vig wrote:
> > On Sep 21, 2009, at 1:02, François Battail <fb@francois.battail.name>
> > wrote:
> >
> >> Le dimanche 20 septembre 2009 à 22:47 -0700, Khalid Shaikh a écrit :
> >>
> >>> worker_processes 32;
> >>
> >> That's way too much, try to keep the number of workers sticked to the
> >> number of cores (eg: 4).
> >
> > Surely you should have more?
> > Eg with 4 cores have 8 workers.
> >
> > If workers block serving a request, this means you don't have CPU
> > sitting idle.
> Generally no. If you are doing everything properly event driven (even
> more so if you shift from a polling model to an AIO model), then any
> time you are busy serving a request, that means your CPU isn't sitting
> idle. The only time it should be idle is when there literally aren't any
> requests/events to process (at which point extra processes isn't going
> to help).
>
> --Chris
>
>
Subject Author Posted

Nginx TCP Delays

Khalid Shaikh September 21, 2009 01:52AM

RE: Nginx TCP Delays

Brian Henson September 21, 2009 03:38AM

Re: Nginx TCP Delays

Khalid Shaikh September 21, 2009 03:46AM

Re: Nginx TCP Delays

François Battail September 21, 2009 04:06AM

Re: Nginx TCP Delays

Khalid Shaikh September 21, 2009 04:22AM

Re: Nginx TCP Delays

Khalid Shaikh September 21, 2009 04:24AM

Re: Nginx TCP Delays

François Battail September 21, 2009 04:58AM

Re: Nginx TCP Delays

Khalid Shaikh September 21, 2009 12:08PM

Re: Nginx TCP Delays

Avleen Vig September 23, 2009 04:52AM

Re: Nginx TCP Delays

François Battail September 23, 2009 11:22AM

Re: Nginx TCP Delays

Christopher Smith September 24, 2009 03:50AM

Re: Nginx TCP Delays

Khalid Shaikh September 24, 2009 11:22AM

Re: Nginx TCP Delays

icqheretic October 05, 2009 03:09PM

Re: Nginx TCP Delays

anomalizer October 03, 2009 03:34AM

Re: Nginx TCP Delays

Maxim Dounin September 21, 2009 04:50AM

Re: Nginx TCP Delays

Khalid Shaikh September 21, 2009 04:58AM

Re: Nginx TCP Delays

Khalid Shaikh September 21, 2009 12:32PM

Re: Nginx TCP Delays

Maxim Dounin September 21, 2009 12:52PM

Re: Nginx TCP Delays

Khalid Shaikh September 21, 2009 02:08PM

Re: Nginx TCP Delays

Khalid Shaikh September 21, 2009 03:44PM

Re: Nginx TCP Delays

Khalid Shaikh September 22, 2009 12:30AM

Re: Nginx TCP Delays

Payam Chychi September 22, 2009 02:24AM



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