# Nginx keep using more and more memory **URL:** \ **Category:** NGINX\ **Created:** [January 18, 2012, 8:25am UTC](https://www.ruby-forum.com/t/nginx-keep-using-more-and-more-memory/215873 "2012-01-18T08:25:19Z")\ **Posts on this page:** 9\ **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:** [January 18, 2012, 8:25am UTC](https://www.ruby-forum.com/t/nginx-keep-using-more-and-more-memory/215873/1 "2012-01-18T08:25:19Z")
Hi, We are using nginx to proxy to 4 back end servers. And we terminate SSL at nginx. We use nginx in a somewhat special way in that we make 1 HTTP GET and the back-end servers give a very very long (essentially never-ending) response. trouble is that i notice that the nginx worker processes keep using up more and more memory. When the connections to nginx terminate, everything seems to be cleaned up and the memory usage of the worker processes drops to normal. my ssl config looks like this: # HTTPS server ``` server { server_name myserver; listen myserver:4443; ssl on; ssl_certificate /myserver.pem; ssl_certificate_key /myserver.pem; proxy_ssl_session_reuse off; ssl_protocols SSLv3 TLSv1; ssl_ciphers HIGH:!ADH:!MD5; ssl_prefer_server_ciphers on; proxy_buffering off; location / { root /www/server/html; index index.html index.htm; } location /SERVER_1/ { rewrite /SERVER_1/(.*) /$1 break; proxy_set_header X-Real-IP $remote_addr; proxy_pass http://localhost:8080; } ``` } i am running nginx/1.0.11 I can reproduce the problem each time with a test setup of: 1 nginx and a special servlet that only dishes out a constant stream of serialized java objects. If you are interested, i can provide also this servlet. then using about 50 long-running HTTP GETs (simulating 100 clients), i can always get more memory usage in nginx. does anyone know if i misconfigured my nginx? * * * posted at [http://www.serverphorums.com](http://www.serverphorums.com) [vic115维多利亚(中国)股份有限公司](http://www.serverphorums.com/read.php?5,431797,431797#msg-431797) ---
**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\ **Post date:** [January 18, 2012, 10:27am UTC](https://www.ruby-forum.com/t/nginx-keep-using-more-and-more-memory/215873/2 "2012-01-18T10:27:52Z")
nginx use memory pool for each http request. If the request is never-ending, more and more memory will be allocated. 2012/1/18 [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): ---
**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\ **Post date:** [January 18, 2012, 11:00am UTC](https://www.ruby-forum.com/t/nginx-keep-using-more-and-more-memory/215873/3 "2012-01-18T11:00:44Z")
On Tuesday 17 January 2012 22:01:01 [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > normal. […] What openssl version do you use? wbr, Valentin V. Bartenev ---
**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\ **Post date:** [January 18, 2012, 11:32am UTC](https://www.ruby-forum.com/t/nginx-keep-using-more-and-more-memory/215873/4 "2012-01-18T11:32:19Z")
Hello! On Tue, Jan 17, 2012 at 07:01:01PM +0100, [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > We are using nginx to proxy to 4 back end servers. And we > terminate SSL at nginx. We use nginx in a somewhat special way > in that we make 1 HTTP GET and the back-end servers give a very > very long (essentially never-ending) response. > > trouble is that i notice that the nginx worker processes keep > using up more and more memory. When the connections to nginx > terminate, everything seems to be cleaned up and the memory > usage of the worker processes drops to normal. […] > i am running nginx/1.0.11 Please try 1.1.x. There is one known problem in 1.0.x which causes it to allocate about 2 pointers per buffer sent. This is known to be noticeable in long-running response case. The problem was fixed in 1.1.4, but unfortunately it’s impossible to merge the fix into 1.0.x due to required API change. Maxim D. ---
**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\ **Post date:** [January 18, 2012, 11:57am UTC](https://www.ruby-forum.com/t/nginx-keep-using-more-and-more-memory/215873/5 "2012-01-18T11:57:08Z")
Hi, thanks for the answer. regarding your tip about proxy\_buffers, i dont think its that because i have disabled proxy\_buffering. I will try out my tests with 1.1 version of nginx and let you know. regards, Saqib ---
**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\ **Post date:** [January 18, 2012, 1:33pm UTC](https://www.ruby-forum.com/t/nginx-keep-using-more-and-more-memory/215873/6 "2012-01-18T13:33:49Z")
Also do you know or can give an estimate of when the 1.1 version will go stable? regards, Saqib ---
**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\ **Post date:** [January 18, 2012, 1:53pm UTC](https://www.ruby-forum.com/t/nginx-keep-using-more-and-more-memory/215873/7 "2012-01-18T13:53:00Z")
On Wednesday 18 January 2012 16:33:22 Saqib Rasul wrote: > Also do you know or can give an estimate of when the 1.1 version will go > stable? [http://trac.nginx.org/nginx/milestone/1.1.17](http://trac.nginx.org/nginx/milestone/1.1.17) FYI, nginx “devel” vs. “stable” difference mainly is about API and behavior stability. Both branches are reliable enough to use in production. wbr, Valentin V. Bartenev ---
**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\ **Post date:** [January 18, 2012, 11:06pm UTC](https://www.ruby-forum.com/t/nginx-keep-using-more-and-more-memory/215873/8 "2012-01-18T23:06:28Z")
OK, i tired 1.1.13 and the bug seems to have been fixed there. Thanks again for the help. Regards, Saqib ---
**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\ **Post date:** [January 18, 2012, 11:18am UTC](https://www.ruby-forum.com/t/nginx-keep-using-more-and-more-memory/215873/9 "2012-01-18T11:18:41Z")
On Wednesday 18 January 2012 13:27:01 Delta Y. wrote: > nginx use memory pool for each http request. > If the request is never-ending, more and more memory will be allocated. No. It’s not true. Please, see the following documentation: > **[Module ngx\_http\_proxy\_module](http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_buffering)** > > The ngx\_http\_proxy\_module module allows passing requests to another server. > **[Module ngx\_http\_proxy\_module](http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_buffers)** > > The ngx\_http\_proxy\_module module allows passing requests to another server. also: > **[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 wbr, Valentin V. Bartenev