proxy_cache_path's max_size being violated/ignored

[gwinans]

The cache manager process is, indeed, running. I even did a brief strace on
it to be sure it was actually working. There is nothing in the logs that
indicates an issue. In fact, the only thing in the logs is expected http
requests.

Output of nginx -V:

[root at nginx01-dpl ~]# nginx -V
nginx version: nginx/1.2.8
built by gcc 4.4.7 20120313 (Red Hat 4.4.7-3) (GCC)
TLS SNI support enabled
configure arguments: --user=nginx --group=nginx --prefix=/usr/share/nginx
--sbin-path=/usr/sbin/nginx --conf-path=/etc/nginx/nginx.conf
--error-log-path=/var/log/nginx/error.log
--http-log-path=/var/log/nginx/access.log
--http-client-body-temp-path=/var/lib/nginx/tmp/client_body
--http-proxy-temp-path=/var/lib/nginx/tmp/proxy
--http-fastcgi-temp-path=/var/lib/nginx/tmp/fastcgi
--http-uwsgi-temp-path=/var/lib/nginx/tmp/uwsgi
--http-scgi-temp-path=/var/lib/nginx/tmp/scgi --pid-path=/var/run/nginx.pid
--lock-path=/var/lock/subsys/nginx --with-http_ssl_module
--with-http_realip_module --with-http_addition_module
--with-http_xslt_module --with-http_image_filter_module
--with-http_geoip_module --with-http_sub_module --with-http_dav_module
--with-http_flv_module --with-http_gzip_static_module
--with-http_random_index_module --with-http_secure_link_module
--with-http_degradation_module --with-http_stub_status_module
--with-http_perl_module --with-mail --with-file-aio --with-mail_ssl_module
--with-ipv6
--add-module=/builddir/build/BUILD/nginx-1.2.8/ngx_cache_purge-2.0
--with-cc-opt='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
-fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic'
--with-ld-opt=-Wl,-E

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,238200,238202#msg-238202