As many people know linux has a built in ramdisk – this is temporary memory and is very very fast (as it’s in ram). AS standard linux allocates 50% of your ram to this (don’t worry if you don’t use it linux uses all your ram anyway).
However sometimes you may decide the 50% is not enough (or is too much) – especially if the server is upgradeable you may decide you would want to manage the percentage.
Below is an example default entry from /etc/fstab
tmpfs /dev/shm tmpfs defaults 0 0
This just creates the temporary system using default settings – nothing fancy – however if you want it to take 75% of your ram (or any other percentage) just change it to the code below
– reboot (or remount) and your done.
tmpfs /dev/shm tmpfs size=75% 0 0 How to unmount the tmpfs umount tmpfs To remount it with the new settings mount tmpfs