我运行nginx服务器+ PHP webservices API.我使用nginx的fastcgi_cache来缓存所有GET请求,当更新某些资源时,我清除一个或多个相关的缓存资源.

我用来执行此操作的方法是为要清除的每个资源计算nginx缓存文件名,然后删除该文件.在大多数情况下,这很有效.

但是,我发现有时,即使删除了缓存文件,nginx仍然会从缓存中返回数据.

这不是选择要删除的正确缓存文件的问题 - 作为我测试的一部分,我删除了整个缓存目录,并且nginx仍然返回HIT响应

有人知道为什么会这样吗？是否可能涉及另一个缓存？例如,操作系统是否正在将缓存文件的缓存版本返回给nginx,因此nginx不知道它已被删除？

我在CentOS上运行它,并使用这个nginx配置(减去不相关的部分):

user nginx;

# Let nginx figure out the best value

worker_processes auto;

events {

worker_connections 10240;

multi_accept on;

use epoll;

}

# Maximum number of open files should be at least worker_connections * 2

worker_rlimit_nofile 40960;

# Enable regex JIT compiler

pcre_jit on;

http {

# TCP optimisation

sendfile on;

tcp_nodelay on;

tcp_nopush on;

# Configure keep alive

keepalive_requests 1000;

keepalive_timeout 120s 120s;

# Configure SPDY

spdy_headers_comp 2;

# Configure global PHP cache

fastcgi_cache_path /var/nginx/cache levels=1:2 keys_zone=xxx:100m inactive=24h;

# Enable open file caching

open_file_cache max=10000 inactive=120s;

open_file_cache_valid 120s;

open_file_cache_min_uses 5;

open_file_cache_errors off;

server {

server_name xxx;

listen 8080;

# Send all dynamic content requests to the main app handler

if (!-f $document_root$uri) {

rewrite ^/(.+) /index.php/$1 last;

rewrite ^/ /index.php last;

}

# Proxy PHP requests to php-fpm

location ~ [^/]\.php(/|$) {

# Enable caching

fastcgi_cache xxx;

# Only cache GET and HEAD responses

fastcgi_cache_methods GET HEAD;

# Caching is off by default, an can only be enabled using Cache-Control response headers

fastcgi_cache_valid 0;

# Allow only one identical request to be forwarded (others will get a stale response)

fastcgi_cache_lock on;

# Define conditions for which stale content will be returned

fastcgi_cache_use_stale error timeout invalid_header updating http_500 http_503;

# Define cache key to uniquely identify cached objects

fastcgi_cache_key "$scheme$request_method$host$request_uri";

# Add a header to response to indicate cache results

add_header X-Cache $upstream_cache_status;

# Configure standard server parameters

fastcgi_split_path_info ^(.+\.php)(/.+)$;

include fastcgi_params;

# php-fpm config

fastcgi_param SCRIPT_URL $fastcgi_path_info;

fastcgi_param PATH_INFO $fastcgi_path_info;

fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;

fastcgi_param REQUEST_SCHEME $scheme;

fastcgi_param REMOTE_USER $remote_user;

# Read buffer sizes

fastcgi_buffer_size 128k;

fastcgi_buffers 256 16k;

fastcgi_busy_buffers_size 256k;

fastcgi_temp_file_write_size 256k;

# Keep connection open to enable keep-alive

fastcgi_keep_conn on;

# Proxy to PHP

fastcgi_pass unix:/var/run/php-fpm/fpm.sock;

}

}

}

现在我看一下,open_file_cache参数是否会影响缓存文件？

有任何想法吗？