# PHP-FPM no cache **URL:** \ **Category:** NGINX\ **Created:** [July 4, 2011, 9:11am UTC](https://www.ruby-forum.com/t/php-fpm-no-cache/209044 "2011-07-04T09:11:52Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![luislavena](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/0ea827/32.png) [@luislavena](https://www.ruby-forum.com/u/luislavena)\ **Post date:** [July 4, 2011, 9:11am UTC](https://www.ruby-forum.com/t/php-fpm-no-cache/209044/1 "2011-07-04T09:11:52Z")
Hello, I’ve enabled caching on php scripts as below but it looks like the server is not caching at all: http { fastcgi\_cache\_path /tmp/cache levels=1:2 keys\_zone=tmp:10m inactive=5m; server { location / { … fastcgi\_cache tmp; fastcgi\_cache\_valid any 1h; fastcgi\_cache\_min\_uses 1; … } } } - but the caching directory is totally empty (nginx has write privileges as it was created by nginx itself during reload) - I haven’t noticed any performance improvements by running apache benchmark from different machine Logs: 2011/07/04 07:53:59 [notice] 1082#0: start cache manager process 1088 2011/07/04 07:53:59 [notice] 1082#0: start cache loader process 1089 2011/07/04 07:54:59 [notice] 1089#0: http file cache: /tmp/cache 0.000M, bsize: 4096 2011/07/04 07:54:59 [notice] 1082#0: signal 17 (SIGCHLD) received 2011/07/04 07:54:59 [notice] 1082#0: cache loader process 1089 exited with code 0 2011/07/04 07:54:59 [notice] 1082#0: signal 29 (SIGIO) received OS: CentOS 5.6 Nginx version: nginx/0.8.54 Could you help me to solve this please. Posted at Nginx Forum: > **[PHP-FPM no cache](https://forum.nginx.org/read.php?2,211926,211926#msg-211926)** > > Hello, I've enabled caching on php scripts as below but it looks like the server is not caching at all: http { fastcgi\_cache\_path /tmp/cache levels=1:2 keys\_zone=tmp:10m inactive=5m; ---
**Author:** ![HTF](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/b19c9b/32.png) [@HTF](https://www.ruby-forum.com/u/HTF)\ **Post date:** [July 4, 2011, 11:00am UTC](https://www.ruby-forum.com/t/php-fpm-no-cache/209044/2 "2011-07-04T11:00:39Z")
Hello! On Mon, Jul 04, 2011 at 02:11:11AM -0500, HTF wrote: > server { > > - but the caching directory is totally empty (nginx has write privileges > as it was created by nginx itself during reload) > - I haven’t noticed any performance improvements by running apache > benchmark from different machine Check your php responses, most likely they disable cache: nginx honors Cache-Control, Expires headers, and additionally it will disable cache if it sees Set-Cookie header in response. This behaviour may be overwritten if desired with fastcgi\_cache\_ignore\_headers directive, see here: > **[GitHub - nginxinc/nginx-wiki: ARCHIVED -- Source for the now archived NGINX Wiki...](https://github.com/nginxinc/nginx-wiki)** > > ARCHIVED -- Source for the now archived NGINX Wiki section of https://www.nginx.com Note though that it’s not generally safe as it may cause private pages (and/or cookies) to be cached and returned to other clients. Handle with care. Maxim D. ---
**Author:** ![HTF](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/b19c9b/32.png) [@HTF](https://www.ruby-forum.com/u/HTF)\ **Post date:** [July 5, 2011, 8:49am UTC](https://www.ruby-forum.com/t/php-fpm-no-cache/209044/3 "2011-07-05T08:49:33Z")
Thank you. I added the following directives in my config file … fastcgi\_ignore\_headers Expires Cache-Control; fastcgi\_pass\_header Set-Cookie; … - and the caching is working now but I still have few questions: 1. “Note though that it’s not generally safe as it may cause private pages (and/or cookies) to be cached and returned to other clients. Handle with care.” - so should I use the caching in my case if it’s working only with the ‘ignore’ option only. Could you tell me when this may happen (“private pages and/or cookies to be cached”), could you provide some examples please. 1. Content of my website is not changing often what is the recommended validation time - hours, days? 2. I have contact form where little message pop after the message is submitted. With cache enabled this window appears on a different menu tab. How to avoid this, should I exclude contact page from caching or is there a better way to do it? 3. When I run Apache benchmark (ab -c 100 -n 5 http:domain.com/) the website is not cached unless I visit it through web browser then AB also use cache. Is there any explanation fort this behaviour? Sorry for so many questions but I try to understand this better. Thank you for your help once again Regards Posted at Nginx Forum: > **[Re: PHP-FPM no cache](https://forum.nginx.org/read.php?2,211926,211948#msg-211948)** > > Hello, I've enabled caching on php scripts as below but it looks like the server is not caching at all: http { fastcgi\_cache\_path /tmp/cache levels=1:2 keys\_zone=tmp:10m inactive=5m; ---
**Author:** ![HTF](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/b19c9b/32.png) [@HTF](https://www.ruby-forum.com/u/HTF)\ **Post date:** [July 5, 2011, 11:22am UTC](https://www.ruby-forum.com/t/php-fpm-no-cache/209044/4 "2011-07-05T11:22:19Z")
Hello! On Tue, Jul 05, 2011 at 02:48:57AM -0400, HTF wrote: > I added the following directives in my config file > … > fastcgi\_ignore\_headers Expires Cache-Control; > fastcgi\_pass\_header Set-Cookie; You don’t need “fastcgi\_pass\_header Set-Cookie;” in 0.8.54, it’s passed by default. > - and the caching is working now but I still have few questions: > > 1. “Note though that it’s not generally safe as it may cause private > pages (and/or cookies) to be cached and returned to other clients. > Handle with care.” > > - so should I use the caching in my case if it’s working only with the > ‘ignore’ option only. Could you tell me when this may happen (“private > pages and/or cookies to be cached”), could you provide some examples > please. Consider your backend uses “Cache-Control” for reason, e.g. it presents personalized pages for each authenticated user. If you ignore Cache-Control and don’t have some user id added to fastcgi\_cache\_key - all of your users will see the same cached page. That’s why recommended aproach is to fix backend to return correct Cache-Control which allows caching for pages which may be cached and vice versa. > 1. Content of my website is not changing often what is the recommended > validation time - hours, days? Up to you. This mostly depends on how quickly you need changes to be shown once they finally happen. > 1. I have contact form where little message pop after the message is > submitted. With cache enabled this window appears on a different menu > tab. How to avoid this, should I exclude contact page from caching or is > there a better way to do it? This looks like a result of problems discussed in (1). > 1. When I run Apache benchmark (ab -c 100 -n 5 http:domain.com/) the > website is not cached unless I visit it through web browser then AB also > use cache. Is there any explanation fort this behaviour? Just a wild guess: your backend returns some visitor tracking cookie for ab as it doesn’t have one, and hence nginx doesn’t cache responses to ab. Maxim D. ---
**Author:** ![HTF](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/b19c9b/32.png) [@HTF](https://www.ruby-forum.com/u/HTF)\ **Post date:** [July 6, 2011, 8:35am UTC](https://www.ruby-forum.com/t/php-fpm-no-cache/209044/5 "2011-07-06T08:35:21Z")
Thanks for help, really helpful. Posted at Nginx Forum: > **[Re: PHP-FPM no cache](https://forum.nginx.org/read.php?2,211926,211982#msg-211982)** > > Hello, I've enabled caching on php scripts as below but it looks like the server is not caching at all: http { fastcgi\_cache\_path /tmp/cache levels=1:2 keys\_zone=tmp:10m inactive=5m;