Clean Out Temporary Files

The WeBWorK system creates and saves a large number of temporary files, e.g. png images of equations, pdf downloads, etc. If e.g. a png image of an equation already exists, it is faster for WeBWorK to locate and use that image than to create a new one. However, eventually the number of temporary files will become very large (especially for large installations) and over time only a very small number of them will be used. Thus it is a good idea, especially for large installations, to clean out temporary files say every semester. WeBWorK will recreate any temporary file it needs that does not already exist, so there is no harm in removing temporary files.

Removing temporary files when a wwtmp directory is set up

Removing temporary files is most important for large installations and I assume all large installations will set up WeBWorK so that all temporary files are places in a separate directory or partition (see

Removing Stale png images of equations

There is a script remove_stale_images that