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11 messages in ru.sysoev.nginxRe: worker_processes| From | Sent On | Attachments |
|---|---|---|
| Šime Ramov | Jan 29, 2007 9:07 am | |
| Aleksandar Lazic | Jan 29, 2007 1:21 pm | |
| Šime Ramov | Jan 29, 2007 2:32 pm | |
| Aleksandar Lazic | Jan 29, 2007 6:05 pm | |
| Šime Ramov | Jan 30, 2007 12:48 pm | |
| Aleksandar Lazic | Jan 30, 2007 12:57 pm | |
| Igor Sysoev | Jan 30, 2007 1:00 pm | |
| Šime Ramov | Jan 30, 2007 2:34 pm | |
| Scott Yang | Jan 30, 2007 2:49 pm | |
| Cliff Wells | Jan 30, 2007 3:11 pm | |
| Aleksandar Lazic | Jan 30, 2007 11:48 pm |
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| Subject: | Re: worker_processes | Actions... |
|---|---|---|
| From: | Aleksandar Lazic (al-n...@public.gmane.org) | |
| Date: | Jan 29, 2007 1:21:04 pm | |
| List: | ru.sysoev.nginx | |
Hi,
On Mon 29.01.2007 18:07, Šime Ramov wrote:
I installed nginx from Debian package and it came configured with worker_processes 1; and worker_connections 1024;
Ok.
Now, I was wondering (since on the english wiki it states that default value for worker_processes is 5), to which value to set this up in some common situations?
It is wrong, sorry :-/
The default is 1, the box is only a config example, I have corrected it on the wiki, thanks for the hint ;-)
For example, if I run one Django site via FastCGI, what value to put in worker_processes? And if I run two Django sites? Three Django sites? One Django site and a couple of static sites?
Hm this is a very difficult question, from my point of view.
I have use mostly this formula:
worker_processes = (max_assumed_concurrent_client * max_fcgi_instances) per site + 2 for the static one
Here for example:
(4 * 2) + 2 = 10 => worker_processes
But you should measure if you setup is the *best* for you application, because if you have *some*/*many* long running answer processes in the app-layer then you could need more worker_processes.
As I have said: it isn't a easy question because there are many, many opinions about this issue ;-)
But as far as I know the follwing are fact, for know:
1.) the proxy/fcgi connection to the backend aren't persistant 2.) with more worker_processes you need more resources 3.) If you setup more worker_processes then *physical* cpus you have some waits, maybe not a issue, but a fact, please correct me if I'am wrong! 4.) You *must* measure you applicaton a *easy* explanation is here: http://mongrel.rubyforge.org/docs/how_many_mongrels.html, yust think on django instead of mongrels ;-)
Hth
Aleks