That depends on your web application and what it does. Watch that talk I referenced, plus another talk I did the prior year:
http://lanyrd.com/2012/pycon/spcdg/ Graham On 18/09/2013, at 11:06 AM, Fini Decima <[email protected]> wrote: > Thanks for the response. > > What, then, are the optimal settings for "processes=" and "threads="? > > > > On Tuesday, September 17, 2013 7:51:18 PM UTC-5, Graham Dumpleton wrote: > > On 18/09/2013, at 10:47 AM, Graham Dumpleton <[email protected]> wrote: > >> You have a very poorly setup configuration. Your WSGI application can only >> handle one request at a time. If one request takes a long time to run, it >> will block out everything else and if it blocks for too long, it will >> timeout. >> >> I would thus very much suggest not using processes=1 and threads=1 for >> daemon mode. >> >> You could also be suffering issues due to third party C extension modules >> which will not working in sub interpreters and which block and cause process >> to hang, thus invoking mod_wsgi deadlock timeout. >> >> I would suggest using: >> >> WSGIApplicationGroup %{GLOBAL} > > Oh, you already use: > > application-group=%{GLOBAL} > > to WSGIScriptAlias, which does the same things. > > Because you are using process-group option to WSGIScriptAlias, then > WSGIProcessGroup is actually redundant. > > Graham > >> >> Also go watch: >> >> http://lanyrd.com/2013/pycon/scdyzk >> >> which explains various stuff about Apache configuration for mod_wsgi. >> >> Graham >> >> On 18/09/2013, at 9:13 AM, Fini Decima <[email protected]> wrote: >> >>> What I've observed is that after every 3 or 4 page loads, the sites takes a >>> long time to load. And after it loads, the process repeats itself. >>> >>> >>> >>> >>> On Monday, September 16, 2013 9:29:47 PM UTC-5, Fini Decima wrote: >>> I have an installation of MediaCore, a media serving application built atop >>> the Django framework I have i running on Apache2 using mod_wsgi. >>> >>> Sometimes it works, other times, it also works, but it takes forever to >>> load, and I get some error messages in Apache's error file like these: = >>> >>> <code> >>> >>> [error] [client IP-ADDR] Script timed out before returning headers: >>> mediacore.wsgi, referer: http://IP-ADDR/ >>> [error] [client IP-ADDR] Script timed out before returning headers: >>> mediacore.wsgi, referer: http://IP-ADDR/ >>> [error] [client IP-ADDR] Script timed out before returning headers: >>> mediacore.wsgi, referer: http://IP-ADDR/ >>> [error] [client IP-ADDR] Script timed out before returning headers: >>> mediacore.wsgi, referer: http://IP-ADDR/ >>> [error] [client IP-ADDR] Script timed out before returning headers: >>> mediacore.wsgi >>> [error] [client IP-ADDR] Script timed out before returning headers: >>> mediacore.wsgi, referer: http://IP-ADDR/ >>> [error] [client IP-ADDR] Script timed out before returning headers: >>> mediacore.wsgi, referer: http://IP-ADDR/ >>> [info] [client IP-ADDR] (70007)The timeout specified has expired: >>> core_output_filter: writing data to the network >>> [info] [client IP-ADDR] (70007)The timeout specified has expired: >>> core_output_filter: writing data to the network >>> [error] [client IP-ADDR] mod_wsgi (pid=25066): Exception occurred >>> processing WSGI script '/var/www/mediacore.wsgi'. >>> [error] [client IP-ADDR] IOError: failed to write data >>> [info] [client IP-ADDR] (32)Broken pipe: core_output_filter: writing data >>> to the network >>> [info] [client IP-ADDR] (32)Broken pipe: core_output_filter: writing data >>> to the network >>> >>> </code> >>> >>> Even as I'm writing this, a video I clicked several minutes ago is still >>> trying to load. >>> >>> Here's my media.wsgi file >>> >>> <code> >>> >>> activate_this = '/var/www/virtualECK/bin/activate_this.py' >>> >>> execfile(activate_this, dict(__file__=activate_this)) >>> >>> >>> >>> deployment_config = '/var/www/deployment.ini' >>> >>> temp_dir = '/var/www/data/tmp' >>> >>> >>> >>> # NOTE: Before running MediaCore, you will need to update the two paths >>> >>> # above to point to the appropriate locations for your installation. >>> >>> >>> >>> import os >>> >>> os.environ['TMPDIR'] = temp_dir >>> >>> >>> >>> if __name__.startswith('_mod_wsgi_'): >>> >>> # Set up logging under mod_wsgi >>> >>> from paste.script.util.logging_config import fileConfig >>> >>> fileConfig(deployment_config) >>> >>> # Load the app! >>> >>> from paste.deploy import loadapp >>> >>> >>> application = loadapp('config:'+deployment_config) >>> >>> </code> >>> >>> >>> >>> And here's my VirtualHost configuration: >>> >>> >>> >>> <code> >>> >>> <VirtualHost *:80> >>> >>> ServerAdmin * >>> >>> >>> >>> DocumentRoot /var/www >>> >>> # For best performance the number of processes should equal the >>> number of CPU >>> >>> # cores (but please note that each process may use about 500 MB >>> RAM). >>> >>> WSGIDaemonProcess eckmedia user=www-data group=www-data \ >>> >>> processes=1 \ >>> >>> threads=1 \ >>> >>> display-name=%{GROUP} \ >>> >>> python-path=/var/www/virtualECK/lib/python2.7/site-packages \ >>> >>> python-eggs=/var/www/data/python-egg-cache >>> >>> WSGIProcessGroup eckmedia >>> >>> # Intercept all requests to /* and pass them to mediacore.wsgi >>> >>> WSGIScriptAlias / /var/www/mediacore.wsgi process-group=eckmedia >>> application-group=%{GLOBAL} >>> >>> >>> >>> <Directory /> >>> >>> Options FollowSymLinks >>> >>> AllowOverride None >>> >>> </Directory> >>> >>> <Directory /var/www/> >>> >>> Options Indexes FollowSymLinks MultiViews >>> >>> AllowOverride None >>> >>> Order allow,deny >>> >>> allow from all >>> >>> </Directory> >>> >>> >>> >>> # Make all the static content accessible. >>> >>> <Directory /var/www/eckmedia/mediacore/public/*> >>> >>> Order allow,deny >>> >>> Allow from all >>> >>> Options -Indexes >>> >>> WSGIScriptReloading On >>> >>> </Directory> >>> >>> ErrorLog ${APACHE_LOG_DIR}/error.log >>> >>> LogLevel info >>> >>> >>> CustomLog ${APACHE_LOG_DIR}/access.log combined >>> >>> >>> </code> >>> >>> >>> >>> And in Apache2.conf, I have: >>> >>> <code> >>> >>> # prefork MPM >>> >>> <IfModule mpm_prefork_module> >>> >>> StartServers 7 >>> >>> MinSpareServers 5 >>> >>> MaxSpareServers 10 >>> >>> MaxClients 150 >>> >>> MaxRequestsPerChild 0 >>> >>> >>> </IfModule> >>> >>> </code> >>> >>> Any ideas what could be causing the errors? >>> >>> TIA >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "modwsgi" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected]. >>> To post to this group, send email to [email protected]. >>> Visit this group at http://groups.google.com/group/modwsgi. >>> For more options, visit https://groups.google.com/groups/opt_out. >> > > > -- > You received this message because you are subscribed to the Google Groups > "modwsgi" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/modwsgi. > For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "modwsgi" group. 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