django session timesout within 10 seconds

I've finally deployed the app. on production and the session timesout very quickly.

If I'm not continuously clicking on links, it'll expire in 15-20 seconds.

This doesn't happen in Dev. but again the setup is comp开发者_如何转开发letely different.

Here is the setup I have in production - nginx + apache (wsgi) + django 1.1.2

Backend is mysql.

The keepalive in nginx is "keepalive_timeout 15;" but the documentation says its for the process nginx launches and isn't related.

Following is present in the settings.py -

`TEMPLATE_CONTEXT_PROCESSORS = (`  
    `'django.core.context_processors.auth',`   
    `'django.core.context_processors.debug',`   
    `'django.core.context_processors.i18n',`   
    `'django.core.context_processors.media',`   
    `'django.core.context_processors.request',`   
    `'myown.custom_settings_context_processor.myown_custom_settings',`   
    `)`   

`SESSION_ENGINE = (`   
        `'django.contrib.sessions.backends.cache'`   
`)`   

`INSTALLED_APPS = (`   
    `'django.contrib.auth',`   
    `'django.contrib.contenttypes',`   
    `'django.contrib.sessions',`   
    `'django.contrib.sites',`   
    `'django.contrib.admin',`   
`)`

If any more info. is required, please let me know and I'll put it. Any pointers about why this would be happening, appreciated.

Thanks to Anil from the django team.
Seems I haven't configured by caching properly.
Went to the default caching by commenting these lines in my settings.py and everything worked like a charm !!!!

SESSION_ENGINE = (
'django.contrib.sessions.backends.cache'
)

Thanks Anil & BrianHV