WSGI Daemon

Apache2 config as 17.06.2014

$ sudo apache2ctl -V
Server version: Apache/2.2.22 (Debian)
Server built:   Feb  1 2014 21:26:04
Server's Module Magic Number: 20051115:30
Server loaded:  APR 1.4.6, APR-Util 1.4.1
Compiled using: APR 1.4.6, APR-Util 1.4.1
Architecture:   64-bit
Server MPM:     Prefork
threaded:     no
forked:     yes (variable process count)
Server compiled with....
-D APACHE_MPM_DIR="server/mpm/prefork"
-D APR_HAS_SENDFILE
-D APR_HAS_MMAP
-D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
-D APR_USE_SYSVSEM_SERIALIZE
-D APR_USE_PTHREAD_SERIALIZE
-D APR_HAS_OTHER_CHILD
-D AP_HAVE_RELIABLE_PIPED_LOGS
-D DYNAMIC_MODULE_LIMIT=128
-D HTTPD_ROOT="/etc/apache2"
-D SUEXEC_BIN="/usr/lib/apache2/suexec"
-D DEFAULT_PIDLOG="/var/run/apache2.pid"
-D DEFAULT_SCOREBOARD="logs/apache_runtime_status"`
-D DEFAULT_LOCKFILE="/var/run/apache2/accept.lock"`
-D DEFAULT_ERRORLOG="logs/error_log"
-D AP_TYPES_CONFIG_FILE="mime.types"
-D SERVER_CONFIG_FILE="apache2.conf"

http.conf

<IfModule mpm_prefork_module>
  StartServers          5
  MinSpareServers       5
  MaxSpareServers      10
  MaxClients          150
  MaxRequestsPerChild   0
</IfModule>

wsgi.conf/mapproxy.conf in each vhosts:

WSGIDaemonProcess mf-chsdi3:main display-name=%{GROUP} user=www-data
WSGIScriptAlias /main/wsgi /home/main/mf-chsdi3/buildout/parts/modwsgi/wsgi

<Location /main/wsgi>
    WSGIProcessGroup mf-chsdi3:main
    WSGIApplicationGroup %{GLOBAL}
</Location>

We may try to play with different values of processes and threads. Note, if we want to continue to use the interractive debugger within the debug toolbar, we have to omit the directive processes=1 (setting to processes=1 switch to wsgi.multiprocess)

See http://code.google.com/p/modwsgi/wiki/ConfigurationDirectives#WSGIDaemonProcess