These aren't big or complicated scripts but at peak times the result can be several calls per second to several scripts.

Are there a sub-set of your scripts that are called more often?

If you have this information or can get the information from logs, it might help you get a sub-set of the scripts and make them resident in ram. This information may also help you look for bottle necks with-in your own scripts. For example, a script the opens a temporary file on the same disk where it resides will not help your performance.

I agree with the other suggestions offered you, but a better understanding of what is happening in your environment will help you solve the disk usage problem.

Good Luck