|
David Lenwell
dlenwell at gmail.com
Mon Nov 26 14:21:31 EST 2007
yeah .. its very broken for me too .. What I am working on is my own session handler.. I don't feel that mysql is a valid replacement because it puts unnecessary load on your database server. We are debating on open sourcing the code I am working on. if I win the argument that open source can be good for us then I will contribute my code to the project. On Nov 26, 2007, at 10:55 AM, David Janes wrote: > All I can say is "we too" -- we're using FileSession. We have not been > able to come up with a cure, though we've minimized use of sessions > which brings the frequency down significantly. > > Regards, etc... > David > > On Nov 26, 2007 1:39 PM, Harish Agarwal <harish at octopart.com> wrote: >> I'm using session handling with ModPython 3.3.1. Originally I was >> using DbmSession and have since transitioned to a custom MySQL >> Session >> handler. With both session types, however, I've noticed that session >> initialization intermittently hangs (not forever, but takes as long >> as >> four minutes to complete), at a low-ish (a handful of times every >> hour, while receiving, say, on order of a thousand or so requests >> every hour) frequency which seems to scale with the amount of traffic >> we're receiving. I had read that long DbmSession cleanups can cause >> problems, which is why I transitioned to the MySQL system, which >> takes >> < 1 second to complete, but I'm still noticing the long session init >> times. >> >> >> I put some debugging statements into the code and it seems to be >> related to session locking. In particular, it is this function call >> in the lock method of the BaseSession class: >> >> >> _apache._global_lock(self._req.server, self._sid) >> >> >> which is taking some time to complete. I'm not familiar with >> _apache._global_lock (is it used to apply a mutex lock to the >> session?) and am having trouble finding information describing its >> usage - but it seems likely that this is the root cause. In the past >> I've had problems with session locking but have since transitioned >> the >> code to ensure that only one session is created per request, as such: >> >> if not hasattr(req,'session'): >> req.session = Session.MySQLSession(req) >> >> >> Can anyone tell me if this kind of behavior is normal or is >> indicative >> of some common configuration or coding error? Any help would be >> greatly appreciated. >> >> Thanks, >> -Harish >> _______________________________________________ >> Mod_python mailing list >> Mod_python at modpython.org >> http://mailman.modpython.org/mailman/listinfo/mod_python >> > > > > -- > David Janes > Founder, BlogMatrix > http://www.blogmatrix.com > http://blogmatrix.blogmatrix.com > _______________________________________________ > Mod_python mailing list > Mod_python at modpython.org > http://mailman.modpython.org/mailman/listinfo/mod_python
|