Hi,

We have used tmpfs to mount frequently used media application cache serving. We have also mounted rest applications on disk where we are facing similar issues of max_size being breached . Please find below details for your reference :

# du -sh /cache/*
245G /cache/12007
161G /cache/12152

# grep a12007 /etc/nginx/nginx.conf
proxy_cache_path /cache/12007 keys_zone=a12007:200m levels=1:2 max_size=200g inactive=10d;
# grep a12152 /etc/nginx/nginx.conf
proxy_cache_path /cache/12152 keys_zone=a12152:200m levels=1:2 max_size=100g inactive=10d;

# df -Th
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/vg_os-lv_root ext4 99G 1.5G 92G 2% /
devtmpfs devtmpfs 756G 0 756G 0% /dev
tmpfs tmpfs 756G 0 756G 0% /dev/shm
tmpfs tmpfs 756G 50M 756G 1% /run
tmpfs tmpfs 756G 0 756G 0% /sys/fs/cgroup
/dev/mapper/vg_os-lv_usr ext4 99G 1.4G 92G 2% /usr
/dev/sda1 ext4 477M 106M 343M 24% /boot
/dev/mapper/vg_cache-lv_cache ext4 1.5T 1.4T 0 100% /cache

Please let us what went wrong here and how this can be corrected.