nginx cache mounted on tmpf getting fulled

[omkar_jadhav_20]

omkar_jadhav_20 Wrote:
-------------------------------------------------------
> 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.
In addition we are getting 90% of cache hit ratio. as suggested by Steve ,
will just making below mounting option changes in fstab will resolve this
issue or I am missing/misscalculating anything :
nodev,noexec,nosuid,noatime,async,size=xxxM,mode=0755,uid=xx,gid=xx

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,271842,272137#msg-272137