In the Debugging Performance tab of the Debugging Options Dialog Box, you can set options to enhance the performance of the debugger such as debugging in Quick Mode, #include files, and caches. You can choose:
To change the size of the a.out cache when debugging multiple programs serially with a single dbx. This reduces dbx's start-up time, but increases its swap space requirements. See Changing the Number of a.outs Cached.
To reduce the swap space requirements of dbx when debugging many different a.outs with many different shared libraries (see Disabling the loadobject Cache)