It’s quite common for a cPanel server to need a larger /tmp partition.
cPanel, by default, creates a loopback device that mounts to /tmp. The default size is only 512MB. This is quite small, especially for shared systems.
Reasons /tmp might become full:
- MySQL operation or Repair requiring temporary space. Keep in mind the /tmp partition must be big enough to support the largest table size on your system. (8GB table would require 8+GB /tmp space)
- PHP sessions consuming space in /tmp
- Rogue scripts living in /tmp
To resize follow these steps:
** Note that this will stop MySQL and will cause service interruption. These commands will resize /tmp to 2GB. If you wish to resize to a greater or smaller size simply change 2048000 to your desired size in bytes.
/etc/init.d/chkservd stop /etc/init.d/mysql stop umount /var/tmp umount /tmp sed -i -e 's/512000/2048000/g' /scripts/securetmp rm /usr/tmpDSK /scripts/securetmp --auto cd /tmp ln -s /var/lib/mysql/mysql.sock /etc/init.d/mysql start /etc/init.d/chkservd start
If you receive errors stating that /tmp could not be unmounted simply run the following command to identify the PID (Process ID) still using /tmp
Next, kill all processes using /tmp using “kill –9 <pid>”