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Matt Barnicle
mattb at wageslavery.org
Tue Sep 23 19:22:46 EDT 2008
> 2008/9/24 Matt Barnicle <mattb at wageslavery.org>: >> well, there are a couple reasons why i didn't try that straight >> away. i'm not really the best at sysadmin type stuff. if something >> were to go wrong this is our one and only live server at the moment >> so i avoid upgrading packages unless i know it's necessary. i >> didn't realize before but we're actually using v3.2.8. it's pretty >> recent, however if you think that the installing the latest version >> is essential towards figuring out the problem i will do it. > > That is not pretty recent, it is 2 1/2 years old. There have one minor > and one more significant release since then. ok, noted... > You can see what has changed or been fixed in between version you are > using and latest version at: > > http://www.modpython.org/live/current/doc-html/app-changes-from-3.2.10.html > http://www.modpython.org/live/current/doc-html/app-changes.html > > It may indeed not be necessary to upgrade, but it would have been a > good start. the other reason i didn't mention is more of a package management reason. we're using centos and the latest version available by yum is the one that's installed now.. but i am now looking into it and will attempt the manual download / install. > When I get the chance I will look again at your post then and see if I > can work out what you are talking about. Be patient, I may not get > to it straight away. > > Graham ok, sure. i assume that sort of thing anyway :-) thanks, >> - m@ >> >>> And what happens if you stop using an older version of mod_python >>> and use the latest version? >>> >>> In other words, upgrade to mod_python 3.3.1 and then we may be able to >>> help. The older versions have various bugs in them and there is no >>> point us trying to debug an issue that may have already been >>> fixed. >>> >>> Graham >>> >>> 2008/9/23 Matt Barnicle <mattb at wageslavery.org>: >>>> i'm having an issue with our site, which seems to be directly >>>> related to using req.sendfile. on our site, we have secure >>>> music >>>> downloads. the user has to go through a series of steps in >>>> order >>>> to >>>> gain access to the music (fyi, we run a legitimate service, not >>>> a >>>> pirate or warez site). just some background info.. basically >>>> we >>>> can't offer a direct download link or the security can be >>>> bypassed. >>>> so downloading is done through the handler, which runs the >>>> checks, >>>> and if everything looks good, the file is sent to the browser >>>> using >>>> req.sendfile with the local path to the file on disk. >>>> >>>> it works.. but the problem is, requests start backing up >>>> whenever >>>> a >>>> download is being sent. it looks like new requests are being >>>> sent >>>> to the apache process that is tied up sending the download file. >>>> i >>>> don't understand why this is happening though. i would think >>>> that >>>> while it's sending the file, no new requests would be queued in >>>> that >>>> process. i can verify this easily by downloading a file, and >>>> while >>>> it's downloading, clicking on a link on the site from the same >>>> window in which i downloaded in. the request will stay in the >>>> WAIT >>>> state (according to mod_status) until the download is finished, >>>> then >>>> the page will load and the queue will clear up. now if i change >>>> the >>>> download link to a static file, served directly by apache, this >>>> problem disappears. >>>> >>>> what can i do to fix this? it's a major issue right now. many >>>> times a day you can go to the site and it will hang for perhaps >>>> 1 >>>> to >>>> 3 minutes, then it will load, due to the above described >>>> situation. >>>> >>>> version notes: >>>> >>>> CentOS release 5 (Final) >>>> apache 2.2.3 >>>> mod_python 3.2 >>>> >>>> using prefork compiled into apache. misc apache configuration: >>>> >>>> KeepAlive Off >>>> >>>> <IfModule prefork.c> >>>> StartServers 8 >>>> MinSpareServers 5 >>>> MaxSpareServers 20 >>>> ServerLimit 256 >>>> MaxClients 256 >>>> MaxRequestsPerChild 4000 >>>> </IfModule> >>>> >>>> thank you for your time and consideration.. >>>> >>>> - m@ >>>> >>>> _______________________________________________ >>>> Mod_python mailing list >>>> Mod_python at modpython.org >>>> http://mailman.modpython.org/mailman/listinfo/mod_python >>>> >>> >> >> >> >
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