[GitHub] lrauldan opened a new issue #1530: Pagespeed slows down nginx

[GitBox <gi...@apache.org>]

lrauldan opened a new issue #1530: Pagespeed slows down nginx
URL: https://github.com/apache/incubator-pagespeed-ngx/issues/1530
 
 
   While profiling our online application we found that there were sections having high response times.
   
   The one with the biggest problems was the listing of some items. Our application profiler, newrelic & blackfire were reporting response times near 200ms, however, nginx took sometimes over 2 seconds to return the response.
   
   We discovered that if we disable the pagespeed module in our nginx configuration, everything would work properly.
   
   Here are the compilation arguments for nginx:
   
   ```
   nginx version: nginx/1.10.3
   built by gcc 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 
   built with OpenSSL 1.0.2g  1 Mar 2016
   TLS SNI support enabled
   configure arguments: --prefix=/etc/nginx --add-module=/root/nginx-1.10.3-with-ip2location/headers-more-nginx-module-master --add-module=/root/ngx_pagespeed/ngx_pagespeed-latest-stable --add-module=/root/nginx-1.10.3-with-ip2location/ip2location-nginx-master --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx.pid --lock-path=/var/run/nginx.lock --http-client-body-temp-path=/var/cache/nginx/client_temp --http-proxy-temp-path=/var/cache/nginx/proxy_temp --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp --http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp --http-scgi-temp-path=/var/cache/nginx/scgi_temp --user=nginx --group=nginx --with-file-aio --with-threads --with-ipv6 --with-http_addition_module --with-http_auth_request_module --with-http_dav_module --with-http_flv_module --with-http_gunzip_module --with-http_gzip_static_m
 odule --with-http_mp4_module --with-http_random_index_module --with-http_realip_module --with-http_secure_link_module --with-http_slice_module --with-http_ssl_module --with-http_stub_status_module --with-http_sub_module --with-http_v2_module --with-mail --with-mail_ssl_module --with-stream --with-stream_ssl_module --with-cc-opt='-g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fPIC' --with-ld-opt='-Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -Wl,--as-needed -pie' --with-http_geoip_module
   ```
   And here is the pagespeed configuration section:
   
   ```
   pagespeed on;
   pagespeed FileCachePath /var/cache/pagespeed;
   pagespeed Domain https://www.domainanme.com;
   pagespeed Domain https://cdn.domainname.com;
   pagespeed SupportNoScriptEnabled false;
   pagespeed EnableFilters combine_css;
   pagespeed EnableFilters combine_javascript;
   pagespeed EnableFilters prioritize_critical_css;
   pagespeed EnableFilters extend_cache;
   pagespeed EnableFilters make_google_analytics_async;
   pagespeed EnableFilters collapse_whitespace;
   pagespeed XHeaderValue "CUSTOM VALUE";
   
   # Ensure requests for pagespeed optimized resources go to the pagespeed handler
   # and no extraneous headers get set.
   location ~ "\.pagespeed\.([a-z]\.)?[a-z]{2}\.[^.]{10}\.[^.]+" {
       add_header "" "";
   }
   
   location ~ "^/pagespeed_static/" { }
   location ~ "^/ngx_pagespeed_beacon$" { }
   ```
   
   Any thoughts on why would pagespeed behave like this?

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