id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
749	Nginx not correctly cleaning fasctgi cache	FredericA.		"Hello,

I'm using nginx as a cache for a busy backend (dynamic tiles server).
The configuration is basically as follow :

In the http block:
fastcgi_cache_path /dev/shm/nginx levels=1:2 keys_zone=fcgiA:50m inactive=30m max_size=2048m;

In the location block, something like:
fastcgi_cache fcgiA;
fastcgi_cache_key ""fcgiA $request_uri"";
fastcgi_cache_valid 30m;
fastcgi_pass unix:/var/run/sA.sock;

Unfortunately, nginx seems to use much more than 2048Mb, until saturation of /dev/shm partition (which is mounted as a tmpfs with 32Gb). proxy_cache is working perfectly by the way, I only have that problem using fastcgi.

Do you think that problem can be related to the huge number of files stored in /dev/shm/nginx (>500.000), preventing the cache manager nginx process to do its work ? Maybe I should change default ""[loader_files=number] [loader_sleep=time] [loader_threshold=time]"" in fastcgi_cache_path or increase the number of levels used to store cached files?

Thanks for your help !"	defect	closed	minor		nginx-core	1.7.x	worksforme			Linux 3.10.23-xxxx-grs-ipv6-64 #1 SMP Mon Dec 9 16:02:37 CET 2013 x86_64 GNU/Linux	"nginx version: nginx/1.4.4
built by gcc 4.7.2 (Debian 4.7.2-5) 
TLS SNI support enabled
configure arguments: --with-http_ssl_module --with-http_stub_status_module --add-module=/root/nginx/nginx-upload-progress-module-master/ --add-module=/root/nginx/nginx-push-stream-module-master/ --with-pcre=/root/nginx/pcre-8.33/ --add-module=/root/nginx/mapcache/build/nginx --with-http_secure_link_module"