The server uses temp space for the various processes. This space may be used for anything from logs and traces to transient work files (such as HOLD files). This temp space uses real disk space, but is recycled and cleaned up based on server configuration (for example, secured servers clean agent directories upon disconnect). Ultimately, a server restarts also cleans up this temporary space. If a server has been turned off, and a restart is not planned (possibly because it was a test configuration), the space may be recovered by the server admin with the following command:
edastart -cleardir