Beta Branch optimise nginx geoip module enabled memory usage for <768MB

optimise nginx geoip module enabled memory usage for <768MB

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123.09beta01 branch

• Branch: centminmod/centminmod at 123.09beta01 · GitHub
• Commit History: Commits · centminmod/centminmod · GitHub

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Optimise Nginx GeoIP Module Enabled Memory Usage for <768MB Systems

For Centmin Mod 123.09beta01 branch, optimise nginx memory usage on low memory systems <=768MB (~741MB after system overhead) or when NGINX_GEOIPMEM=n. When nginx geoip module is enabled (by default), nginx uses in memory caching of geoip country, city databases. When NGINX_GEOIPMEM=n is set, it changes it so that nginx uses disk based caching instead of memory based caching.

If you do not use nginx geoip module at all, you can disable it in centmin.sh or via persistent configure file /etc/centminmod/custom_config.inc and set NGINX_GEOIP=n + recompile nginx via centmin.sh menu option 4 to disable the nginx geoip module completely.

Default nginx geoip module enabled memory usage when enabled for memory caching

Code:

ps aufx | grep nginx | grep -v grep
root      2608  0.0  1.5 173748 29196 ?        Ss   22:20   0:00 nginx: master process /usr/local/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
nginx     2610  0.0  1.7 181944 33708 ?        S<l  22:20   0:00  \_ nginx: worker process
nginx     2611  0.0  1.7 181944 33696 ?        S<l  22:20   0:00  \_ nginx: worker process

nginx geoip module enabled memory usage when switched from memory to disk caching via centmin.sh NGINX_GEOIPMEM=n variable. NGINX_GEOIPMEM=y is for default nginx memory cached geoip database data.

Code:

ps aufx | grep nginx | grep -v grep
root     16457  0.0  0.3 153256  6496 ?        Ss   22:26   0:00 nginx: master process /usr/local/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
nginx    16458  0.0  0.5 161452 10876 ?        S<l  22:26   0:00  \_ nginx: worker process
nginx    16459  0.1  0.5 161452 10876 ?        S<l  22:26   0:00  \_ nginx: worker process

• VSZ difference = 181944 - 161462 = 20,492 = 20.01MB or 11.26% reduction
• RSS difference = 33708 - 10876 = 22,832 = 22.3MB or 67.73% reduction