On Apr 26, 8:10 am, "Jeremy Dunck" <[EMAIL PROTECTED]> wrote: > On 4/25/07, Jin Lee <[EMAIL PROTECTED]> wrote: > > 5) Using apache, can you run a pool of django processes so that if one user > > is doing something particularly heavy, it doesnt slow down the entire site? > > (Basically what you do with Apache balancer and mongrels in ruby) > > The typical deployment uses Apache prefork, which are indeed separate > processes. Some people also use worker, which is threaded. Python
If you are running Apache on Windows which some of the questions suggest may being used, Apache only creates a single process in which all requests are handled. That single process can use multiple threads to handle concurrent requests however. Note though that no matter whether you use Windows or UNIX (Linux) systems, when you run multiple Django instances all are still resident within one process. Thus, even though prefork and worker on UNIX use multiple processes, each process still has all Django instances in it. The requests are just shared across the processes as well as threads within a process when supported. In other words, when using mod_python at least, there is no ability to say that one users Django instances runs in a process of its with others users also in their own process. Thus, one Django instance running badly or using up lots of memory can affect the performance of other users Django instances. Also, because all Django instances are resident in the same process, they all run as the same user which is normally a special Apache user. If you require that different users Django instances be run in separate processes you can't use mod_python in a single Apache server instance. What you would have to do in that case is using proxying to redirect to different backend servers for each user, use fastcgi, or when the feature for distinct daemon processes per user is made available, use mod_wsgi. Graham --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---
