Welcome! Log In Create A New Profile

Advanced

Re: nginx workers in "D" status in top

Joaquin Cuenca Abela
July 27, 2010 01:28PM
I has this problem before, somehow nginx was blocking on access to a
NFS partition that was saturated. Check if you have any link
whatsoever with a saturated disk, and pay special attention to NFS
partitions.

On Tue, Jul 27, 2010 at 6:54 PM, Ryan Malayter <malayter@gmail.com> wrote:
> I'm seeing a number of workers periodically entering the "D" status in
> top (uninteruptible sleep). Normally, this means it is blocking on
> disk IO. However, I am using nginx 0.7.62 (default package) on Ubunutu
> 9.10, and I believe asynchronous IO should be enabled.
>
> We are using proxy_cache, so there is some reading from disk in our
> configuration (not just reverse proxy).
>
> Is it normal to have nginx workers block on the disk even on an
> asynchronous IO-capable system?
>
> How can I check if nginx is actually using async IO?
>
> My configuration is large, but I will post fragments if necessary. I
> am using 4 worker processes on a single-CPU system (recently upped to
> 10 because of this issue).
>
> Thanks,
>
> --
> RPM
>
> _______________________________________________
> nginx mailing list
> nginx@nginx.org
> http://nginx.org/mailman/listinfo/nginx
>



--
Joaquin Cuenca Abela

_______________________________________________
nginx mailing list
nginx@nginx.org
http://nginx.org/mailman/listinfo/nginx
Subject Author Posted

nginx workers in "D" status in top

Ryan Malayter July 27, 2010 01:04PM

Re: nginx workers in "D" status in top

Joaquin Cuenca Abela July 27, 2010 01:28PM

Re: nginx workers in "D" status in top

Ryan Malayter July 27, 2010 02:32PM

Re: nginx workers in "D" status in top

Igor Sysoev July 27, 2010 02:54PM

Re: nginx workers in "D" status in top

Ryan Malayter July 27, 2010 11:28PM



Sorry, only registered users may post in this forum.

Click here to login

Online Users

Guests: 114
Record Number of Users: 6 on February 13, 2018
Record Number of Guests: 421 on December 02, 2018
Powered by nginx      Powered by FreeBSD      PHP Powered      Powered by MariaDB      ipv6 ready