Nginx + pagespeed模块| 图像caching时间为首页加载5分钟

我有一个nginx / pagespeed模块的问题。 图像caching时间是默认的第一页上的5分钟。

第一次：

第二次：

有在我的nginx.conf：

• nginx反向代理：如何通过“接受编码”标头传递给后端服务器
• nginx的try_files绝对path
• nginx包含fastcgi_params命令
• Nginx，CakePHP：错误：在文件中创build下面的类Index.phpController：App / Controller / Index.phpController.php
• 正则expression式位置块在NGINX中不起作用

## # PageSpeed ## pagespeed on; pagespeed FileCachePath /var/ngx_pagespeed_cache; pagespeed Domain https://example.com; pagespeed Domain *.example.com; pagespeed MapOriginDomain "http://localhost" "https://example.com"; pagespeed LoadFromFile "https://example.com" "/usr/share/nginx/www/"; pagespeed LoadFromFileRuleMatch Disallow \.php$; pagespeed XHeaderValue "Powered By ngx_pagespeed"; pagespeed ListOutstandingUrlsOnError on; pagespeed EnableFilters extend_cache; # image related pagespeed EnableFilters rewrite_images; pagespeed EnableFilters convert_gif_to_png; pagespeed EnableFilters convert_jpeg_to_progressive; pagespeed EnableFilters strip_image_color_profile; pagespeed EnableFilters strip_image_meta_data; pagespeed EnableFilters jpeg_subsampling; pagespeed EnableFilters lazyload_images; # code related pagespeed EnableFilters collapse_whitespace; # DNS related pagespeed EnableFilters insert_dns_prefetch; # JS related pagespeed UseExperimentalJsMinifier on; pagespeed EnableFilters rewrite_javascript; pagespeed EnableFilters combine_javascript; # css related pagespeed EnableFilters rewrite_css; pagespeed EnableFilters prioritize_critical_css; pagespeed EnableFilters combine_css; pagespeed EnableFilters outline_css; pagespeed EnableFilters flatten_css_imports; 

我如何修改默认的5分钟caching时间？ 我怎样才能通过pagespeed模块在第一页上加载图像？

它没有帮助：

  location ~* \.(jpg|jpeg|gif|png|ico|cur|gz|svg|svgz|mp4|ogg|ogv|webm|htc)$ { expires 1y; access_log off; add_header Cache-Control "public"; try_files $uri =404; } location ~* \.(pdf|js|css|swf)$ { expires 1M; access_log off; add_header Cache-Control "public"; try_files $uri =404; }