Only cache the windows that are needed frequently.
You may want to make sure that only those windows are cached that are needed frequently. This way you avoid needless swapping.
When to use
For windows that are used incidentally, set the Fast Open property to No. The window will not be cached in the workspace cache once it has been opened.
For windows that a specific user group opens frequently, set the Fast Open property to Yes. The window will then open much faster a second or subsequent time it is opened.
To keep a window class out of the workspace cache: