python - Tracking Django/FastCGI Process Errors -


i run django based site on nginx fastcgi server. site works great. every 2-3 days, site run unknown problem , stop responding requests.

munin graphs shows io blocks read & write per second increases 500% during problem.

i wrote python script record the following stats every 1 minute.

load averages cpu usage (user, nice, system, idle, iowait) ram usage swap usage number of fastcgi processes ram used fastcgi processes

the record shows during problem, number of fastcgi processes doubled (from normal value of 10-15 25-30). , ram usage fastcgi processes doubled (from 17% 35% of total ram on server). memory usage increase required more swap used slow down disk io made server unresponsive.

fastcgi parameters used:

maxspare=10 minspare=5 maxchildren=25 maxrequests=1000

i guess problem due poorly written python code in part of site. don't know how find out part of code froze existing fastcgi processes , forking new instances.

you've limited number of children 25 when there 25 processes running , processing requests further ones block , site appear not responding.

it sounds me have infinite (or long) loop causing processes block. suggest add idle-timeout fastcgi script. have effect of allowing site continue killing long running queries, , let debug problem sending tracebacks processes killed.


Comments

Post a Comment

Popular posts from this blog

apache - Add omitted ? to URLs -

i working on website cms reads page name of query string, e.g. http://exmaple.com/?pagename . trying create rewrite rule rewrite ? . so, user types in /pagename , taken /?pagename try this: rewriteengine on rewritecond %{request_filename} !-d rewritecond %{request_filename} !-f rewriterule ^/?(.*) index.php?$1 [l]
Read more

redirect - bbPress Forum - rewrite to wwww.mysite prohibits login -

i using bbpress installation without wordpress integration. the redirect of rewriteengine @ forum site works: rewriteengine on rewritecond %{http_host} ^forum.mysite.com$ rewriterule (.*)$ http://www.forum.mysite.com/$1 [r=301,l] the problem login pppress. bbpress login not recognize: http://www.forum.mysite/bb-login.php . it redirects to: http://forum.mysite.com/bb-login.php . i tried permalink settings none , name based, same issue. does uses redirect in bbpress or how can eliminate "double" content , redirect permanently www.? i redirected www.forum.mysite.com forum.mysite.com , achieved eliminate "double" content.
Read more

php - How can I stop spam on my custom forum/blog? -

so have custom built forum & blog system of late has been dealing lot of spam. if wordpress use akismet, if different common platform i'm sure i'd find plugin. there kind of static class can download this? using php. i'd still go akismet, if it. uses outside of wordpress, may have pay fee it, depending on use -- check terms , conditions -- it's option , easy implement in php using api. use api key wordpress. com account access. basically, grab whichever php client library takes fancy -- use alex potsides' php5 library -- plug in key, , it's handful of lines of code. here's bare bones of validation straight 1 of live sites: ... if ($akismet) { $akismet->setcommentauthor($name); $akismet->setcommentauthoremail($session->userinfo["email"]); $akismet->setcommentauthorurl(""); $akismet->setcommentcontent($sentence);...
Read more