After a lot of testing on various VPSes and various VPS providers' provided CentOS OS image templates over time, the disk usage patterns are becoming clearer. Some VPS providers have heavy default CentOS OS images than others and Centmin Mod LEMP's automated backup routines for Nginx configuration, ccache compiler cache and source download compilations require more disk space as time goes by. So today, I revised the Centmin Mod LEMP stack's minimum & recommended disk space requirements to better meet these patterns of usage. From Centmin Mod LEMP Stack Install Nginx on CentOS the revised disk usage requirements are: A quick list of routines where disk space usage grow over time. Nginx Auto Backup Routine Everytime you run centmin.sh menu option 4 to upgrade, downgrade or recompile Nginx server, a backup of the Nginx configuration files and ssl certificates are made to timestamped directories within /usr/local/nginxbackup Code: du -h --max-depth=1 /usr/local/nginxbackup/ 588K /usr/local/nginxbackup/confbackup 11M /usr/local/nginxbackup/nginxdirbackup 11M /usr/local/nginxbackup/ ccache Source Compiler Cache Centmin Mod source compiles Nginx and PHP-FPM and a select few PHP extensions. And to speed up recompiles, Centmin Mod installs and uses ccache source compiler caching. The ccache allows recompiles to be up to 60+% faster. The ccache cache storage is at /home/.ccache. To see current ccache storage stats and disk usage Code: du -sh /home/.ccache/ ccache -s Code: du -sh /home/.ccache/ 292M /home/.ccache/ Code: ccache -s cache directory /home/.ccache primary config /home/.ccache/ccache.conf secondary config (readonly) /usr/local/etc/ccache.conf cache hit (direct) 2679 cache hit (preprocessed) 4007 cache miss 6318 called for link 345 called for preprocessing 612 compile failed 215 preprocessor error 104 bad compiler arguments 115 unsupported source language 114 autoconf compile/link 1926 no input file 243 files in cache 18222 cache size 317.3 MB max cache size 2.2 GB To clear ccache disk space use command Code: ccache -C Source download directory /svr-setup All Centmin Mod source and other required downloaded files are saved at /svr-setup and over time this can grow. You could nuke everything in this directory and Centmin Mod will redownload what's needed but overtime this will grow. The next Centmin Mod 123.09beta01 and higher have smarter routines to only keep the last and most recent version of largest downloads like php, nginx_pagespeed, nginx, openssl, libressl etc. Code: du -sh /svr-setup 1.8G /svr-setup/ 10 largest directories in /svr-setup Code: du --max-depth=1 /svr-setup/ | sort -k1 -n | tail -10 20824 /svr-setup/mongodb-1.1.1 25068 /svr-setup/libevent-release-2.0.22-stable 29524 /svr-setup/openssl-1.0.2f 54412 /svr-setup/nginx-1.9.10 111496 /svr-setup/libressl-2.2.6 236052 /svr-setup/php-5.6.16 252748 /svr-setup/php-7.0.1 253036 /svr-setup/php-7.0.2 609388 /svr-setup/ngx_pagespeed-release-188.8.131.52-beta 1883568 /svr-setup/ dbbackup.sh MySQL Backup Script For Premium members who have access to dbbackup.sh MySQL backup script, they'll have a growing number of MySQL backup files occupying local disk space. Swap and /tmp Also auto creation of a larger on disk /tmp filesystem if you're on a very low memory system as ramdisk based /tmp would not be sufficient if you have low memory amount installed and utilise MySQL which uses /tmp. Centmin Mod 123.09beta01+ and higher also add an on disk based swap file if one is not detected and the size of the swap file created is dynamically determined based your available disk free space and amount of memory installed on your system. An example on a 1GB memory 20GB disk with 19GB free space which initially didn't have a swap file, would after Centmin Mod install have a ~950MB /tmp file created on disk and a 1023MB swap file on disk.