Default pagespeed conf file for NGINX server, to be placed in http block. Save in /etc/nginx/conf.d/

ps.conf

pagespeed on;
pagespeed FileCachePath                 "/var/ngx_pagespeed_cache";
pagespeed FileCacheSizeKb               102400;
pagespeed FileCacheCleanIntervalMs      3600000;
pagespeed FileCacheInodeLimit           500000;
pagespeed LRUCacheKbPerProcess          8192;
pagespeed LRUCacheByteLimit             16384;
pagespeed EnableCachePurge              on;
pagespeed MemcachedServers              "127.0.0.1:11211";
pagespeed PreserveUrlRelativity         on;
pagespeed RewriteLevel                  OptimizeForBandwidth;
pagespeed LowercaseHtmlNames            on;
#pagespeed RespectXForwardedProto        on;