worker_process & blockend IO

Michael Baudino michael.baudino at
Thu Jul 23 11:58:43 MSD 2009

Igor Sysoev wrote:
> On Wed, Jul 22, 2009 at 07:38:16PM +0200, Michael Baudino wrote:
>> Hello,
>> I'm using nginx 0.7.59 on a Debian unstable machine to serve huge files
>> (300+ MB) from 2 different filesystems : one  is local, the other is
>> nfs-mounted over an ADSL link.
>> The nfs filesystem is sooooo slow !
>> To reduce IO latency, I'm using worker_process 16 (single CPU, though).
>> How does nginx handles workers ?
>> Does it choose a worker randomly for each connection ?
>> Or does it connect to the same worker until it has reached its
>> worker_connections limit then connect to the next worker ?
>> In that case, should I set a very low worker_connection to force it to
>> change worker often ? (I tried it but I got a lot of "worker_connections
>> are not enough while connecting to upstream")
> workers get connection randomly.
> NFS I/O is blocking and it's better to set up second nginx on remote host
> and to use proxy:
>    client > nginx/local fs
>                  /proxy    > ADSL > nginx/local fs

Hi Igor,

Actually I though that proxying to the remote host would be blocking too...
I will try this solution and let you know asap.

Thanks for your fast answer, as usual.

KameHouse Prod.

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