I know that there is a crontab task which is responsible to regenrerate the documentation every two hours. I wonder if it can't be better to remove this crontab task and add a specific search of modified files in docs directory a commit (in post-commit hook), to automatically call the documentation regeneration task ?

This way the server won't regenerate the document when it is not required and we are sure that each updates to docs directory in SVN imply the site web updates without waiting for the end of the 2 hours window.