mod_wsgi + apache not multithreaded, why?
lega
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# coding: utf-8
import time
def application(environ, start_response):
status = '200 OK'
output = str(time.time())
time.sleep(5)
output += ' -> ' + str(time.time())
response_headers = [('Content-type', 'text/html; charset=utf-8'),
('Content-Length', str(len(output)))]
start_response(status, response_headers)
return [output]
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Apache VirtualHost
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ServerName localhost
WSGIDaemonProcess main user=www-data group=www-data processes=1
threads=5
WSGIScriptAlias / /var/www/main/main.wsgi
WSGIProcessGroup main
WSGIApplicationGroup %{GLOBAL}
Order deny,allow
Allow from all
ErrorLog /var/log/apache2/main_error_log
CustomLog /var/log/apache2/main_log common
--------------------------------------
Сonnecting multiple clients, they are processed sequentially, there is
no multithreading. Why?
Graham Dumpleton
you modified the MPM settings?
Also try:
import cStringIO
import os
def application(environ, start_response):
headers = []
headers.append(('Content-Type', 'text/plain'))
write = start_response('200 OK', headers)
input = environ['wsgi.input']
output = cStringIO.StringIO()
print >> output, "PID: %s" % os.getpid()
print >> output, "UID: %s" % os.getuid()
print >> output, "GID: %s" % os.getgid()
print >> output
keys = environ.keys()
keys.sort()
for key in keys:
print >> output, '%s: %s' % (key, repr(environ[key]))
print >> output
output.write(input.read(int(environ.get('CONTENT_LENGTH', '0'))))
return [output.getvalue()]
What shows for mod_wsgi.process_group, mod_wsgi.application_group,
wsgi.multiprocess and wsgi.multithread?
This will confirm in what environment it is running.
Also explain what client you are using. There has been a case before
where the client wasn't parallelizing requests because it was giving
priority to trying to push requests down the same keep alive
connection.
Graham
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lega
mod_wsgi.callable_object=application
mod_wsgi.listener_host=
mod_wsgi.listener_port=80
mod_wsgi.process_group=main
mod_wsgi.reload_mechanism=1
mod_wsgi.script_reloading=1
mod_wsgi.version=(2, 8)
wsgi.errors=
wsgi.file_wrapper=
wsgi.input=
wsgi.multiprocess=True
wsgi.multithread=True
wsgi.run_once=False
wsgi.url_scheme=http
wsgi.version=(1, 0)
lega
PID: 3509
UID: 33
GID: 33
DOCUMENT_ROOT: '/htdocs'
GATEWAY_INTERFACE: 'CGI/1.1'
HTTP_ACCEPT: 'application/xml,application/xhtml+xml,text/
html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5'
HTTP_ACCEPT_CHARSET: 'ISO-8859-1,utf-8;q=0.7,*;q=0.3'
HTTP_ACCEPT_ENCODING: 'gzip,deflate,sdch'
HTTP_ACCEPT_LANGUAGE: 'ru,en-US;q=0.8,en;q=0.6'
HTTP_CACHE_CONTROL: 'max-age=0'
HTTP_CONNECTION: 'keep-alive'
HTTP_COOKIE: 'voit=4c2aeab89f1fdf1443000000'
HTTP_HOST: 'localhost'
HTTP_USER_AGENT: 'Mozilla/5.0 (X11; U; Linux i686; en-US) AppleWebKit/
533.4 (KHTML, like Gecko) Chrome/5.0.375.99 Safari/533.4'
PATH: '/usr/local/bin:/usr/bin:/bin'
PATH_INFO: '/'
PATH_TRANSLATED: '/var/www/main/main.wsgi/'
QUERY_STRING: ''
REMOTE_ADDR: '127.0.0.1'
REMOTE_PORT: '50875'
REQUEST_METHOD: 'GET'
REQUEST_URI: '/'
SCRIPT_FILENAME: '/var/www/main/main.wsgi'
SCRIPT_NAME: ''
SERVER_ADDR: '127.0.0.1'
SERVER_ADMIN: '[no address given]'
SERVER_NAME: 'localhost'
SERVER_PORT: '80'
SERVER_PROTOCOL: 'HTTP/1.1'
SERVER_SIGNATURE: '<address>Apache/2.2.14 (Ubuntu) Server at localhost
Port 80</address>\n'
SERVER_SOFTWARE: 'Apache/2.2.14 (Ubuntu)'
mod_wsgi.application_group: ''
mod_wsgi.callable_object: 'application'
mod_wsgi.listener_host: ''
mod_wsgi.listener_port: '80'
mod_wsgi.process_group: 'main'
mod_wsgi.reload_mechanism: '1'
mod_wsgi.script_reloading: '1'
mod_wsgi.version: (2, 8)
wsgi.errors: <mod_wsgi.Log object at 0xb7703e00>
wsgi.file_wrapper: <built-in method file_wrapper of mod_wsgi.Adapter
object at 0xb7747608>
wsgi.input: <mod_wsgi.Input object at 0xb7702fc0>
wsgi.multiprocess: True
wsgi.multithread: True
wsgi.run_once: False
wsgi.url_scheme: 'http'
wsgi.version: (1, 0)
-------------------------------------------
lega
parallel.
Thank you.
Graham Dumpleton
/usr/sbin/httpd -V
Also give settings for the following from Apache configuration file.
# prefork MPM
# StartServers: number of server processes to start
# MinSpareServers: minimum number of server processes which are kept spare
# MaxSpareServers: maximum number of server processes which are kept spare
# MaxClients: maximum number of server processes allowed to start
# MaxRequestsPerChild: maximum number of requests a server process serves
<IfModule mpm_prefork_module>
StartServers 1
MinSpareServers 1
MaxSpareServers 10
MaxClients 150
MaxRequestsPerChild 0
</IfModule>
# worker MPM
# StartServers: initial number of server processes to start
# MaxClients: maximum number of simultaneous client connections
# MinSpareThreads: minimum number of worker threads which are kept spare
# MaxSpareThreads: maximum number of worker threads which are kept spare
# ThreadsPerChild: constant number of worker threads in each server process
# MaxRequestsPerChild: maximum number of requests a server process serves
<IfModule mpm_worker_module>
StartServers 2
MaxClients 150
MinSpareThreads 25
MaxSpareThreads 75
ThreadsPerChild 25
MaxRequestsPerChild 0
</IfModule>
You also haven't clearly explained what client you are using to do the
test and how.
Please don't use a web browser, instead use 'ab' with your original
test with delay. For example:
ab -c 10 -n 20 http://localhost/some/url
Using 'ab' will show whether it is the way you are testing it with the
browser that is the problem.
Post all results.
Graham