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GNU Info (emacs)Auto Save ControlControlling Auto-Saving ----------------------- Each time you visit a file, auto-saving is turned on for that file's buffer if the variable `auto-save-default' is non-`nil' (but not in batch mode; Note: Entering Emacs). The default for this variable is `t', so auto-saving is the usual practice for file-visiting buffers. Auto-saving can be turned on or off for any existing buffer with the command `M-x auto-save-mode'. Like other minor mode commands, `M-x auto-save-mode' turns auto-saving on with a positive argument, off with a zero or negative argument; with no argument, it toggles. Emacs does auto-saving periodically based on counting how many characters you have typed since the last time auto-saving was done. The variable `auto-save-interval' specifies how many characters there are between auto-saves. By default, it is 300. Auto-saving also takes place when you stop typing for a while. The variable `auto-save-timeout' says how many seconds Emacs should wait before it does an auto save (and perhaps also a garbage collection). (The actual time period is longer if the current buffer is long; this is a heuristic which aims to keep out of your way when you are editing long buffers, in which auto-save takes an appreciable amount of time.) Auto-saving during idle periods accomplishes two things: first, it makes sure all your work is saved if you go away from the terminal for a while; second, it may avoid some auto-saving while you are actually typing. Emacs also does auto-saving whenever it gets a fatal error. This includes killing the Emacs job with a shell command such as `kill %emacs', or disconnecting a phone line or network connection. You can request an auto-save explicitly with the command `M-x do-auto-save'. automatically generated by info2www version 1.2.2.9 |