Memory issue

Thu Apr 6 16:36:05 UTC 2017

> cpanel stat generation cause thet nginx makes a lot of reload to grab new file descriptor... no issue on that

Even though this is off-topic - if you issue a lot of reloads during cPanel stat generation, your hooks are configured wrong, since Apache in cPanel only reloads *once* during the whole process.

> Issue is nginx, I show you situation now with 2.58% used for 1 work, which is same value for others, but gloably, nginx uses now 2.58%, this number is increasing slowly at the rythm of nginx reloads asked..

I happen to use nginx (mainline version) myself on a cPanel server - no custom modules, there's no memory leak in the latest versions of nginx - I stay happily at 0.2% in memory (32 gigabyte server)

> Anoop is dev of Xtendweb stack using nginx core, he is investigating, and it seems his solution if to use a pre-approved nginx core : https://openresty.org/en/

Using OpenResty wouldn't solve your issues - you can use the exact same modules as OpenResty does, in a normal nginx build (be aware that some modules such as the lua module, and the echo-nginx module isn't yet building correctly against nginx 1.11.11+)

In the end, include only the extra modules you require - because as far as I can tell, in the mainline version of nginx, nothing (at least for me) has caused memory issues with workers, even when reloading a bunch of times.

It might very well be that one of the 3rd-party modules have not been fully tested to work with 1.11.13

On 06/04/2017, 17.32, "nginx on behalf of JohnCarne" <nginx-bounces at nginx.org on behalf of nginx-forum at forum.nginx.org> wrote:

>cpanel stat generation cause thet nginx makes a lot of reload to grab new
>file descriptor... no issue on that
>
>Issue is nginx, I show you situation now with 2.58% used for 1 work, which
>is same value for others, but gloably, nginx uses now 2.58%, this number is
>increasing slowly at the rythm of nginx reloads asked...
>
>
>[root at web1 ~]# ps alx | grep nginx
>5    99  711213  913692  20   0 3917936 3397132 ep_pol S ?          0:22
>nginx: worker process
>5    99  711224  913692  20   0 3918128 3397300 ep_pol S ?          0:24
>nginx: worker process
>5    99  711229  913692  20   0 3918392 3397456 ep_pol S ?          0:26
>nginx: worker process
>5    99  711238  913692  20   0 3918128 3397228 ep_pol S ?          0:20
>nginx: worker process
>5    99  711245  913692  20   0 3917936 3397144 ep_pol S ?          0:23
>nginx: worker process
>5    99  711248  913692  20   0 3918096 3397296 ep_pol S ?          0:18
>nginx: worker process
>5    99  711252  913692  20   0 3918392 3397392 ep_pol S ?          0:21
>nginx: worker process
>5    99  711255  913692  20   0 3918128 3397132 -   R    ?          0:19
>nginx: worker process
>5    99  711257  913692  20   0 3917580 3394632 ep_pol S ?          0:00
>nginx: cache manager process
>0     0  767011  766950  20   0 112652   956 pipe_w S+   pts/2      0:00
>grep --color=auto nginx
>5     0  913692       1  20   0 3917576 3396176 sigsus Ss ?        74:26
>nginx: master process /usr/sbin/nginx -c /etc/nginx/nginx.conf
>
>
>Output of nginx -T is taking 100's of pages, i can't pu it here...
>
>[root at web1 ~]# nginx -V
>nginx version: nginx/1.11.13
>built by gcc 4.8.5 20150623 (Red Hat 4.8.5-11) (GCC)
>built with LibreSSL 2.5.2
>TLS SNI support enabled
>configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx
>--modules-path=/etc/nginx/modules --with-pcre=./pcre-8.40 --with-pcre-jit
>--with-zlib=./zlib-1.2.11 --with-openssl=./libressl-2.5.2
>--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=nobody
>--group=nobody --with-http_ssl_module --with-http_realip_module
>--with-http_addition_module --with-http_sub_module --with-http_dav_module
>--with-http_flv_module --with-http_mp4_module --with-http_gunzip_module
>--with-http_gzip_static_module --with-http_random_index_module
>--with-http_secure_link_module --with-http_stub_status_module
>--with-http_auth_request_module --add-dynamic-module=naxsi-http2/naxsi_src
>--with-file-aio --with-threads --with-stream --with-stream_ssl_module
>--with-http_slice_module --with-compat --with-http_v2_module
>--with-http_geoip_module=dynamic
>--add-dynamic-module=ngx_pagespeed-release-1.11.33.4-beta
>--add-dynamic-module=/usr/local/rvm/gems/ruby-2.3.1/gems/passenger-5.1.2/src/nginx_module
>--add-dynamic-module=ngx_brotli --add-dynamic-module=echo-nginx-module-0.60
>--add-dynamic-module=headers-more-nginx-module-0.32
>--add-dynamic-module=ngx_http_redis-0.3.8
>--add-dynamic-module=redis2-nginx-module
>--add-dynamic-module=srcache-nginx-module-0.31
>--add-dynamic-module=ngx_devel_kit-0.3.0
>--add-dynamic-module=set-misc-nginx-module-0.31
>--add-dynamic-module=ModSecurity-nginx --with-cc-opt='-O2 -g -pipe -Wall
>-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong
>--param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic'
>--with-ld-opt=-Wl,-E
>[root at web1 ~]#
>
>
>Anoop is dev of Xtendweb stack using nginx core, he is investigating, and it
>seems his solution if to use a pre-approved nginx core :
>https://openresty.org/en/
>and that it could solve many issues with 3rd party modules which we need to
>use absolutely...
>
>Indeed, we are all tired to do 3 upgrades /month
>
>Posted at Nginx Forum: https://forum.nginx.org/read.php?2,273274,273456#msg-273456
>
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