Like many people, you've probably found that increasing the size of
the disk cache in the Memory control panel can improve the performance
of many applications, especially web browsers like Netscape Navigator.
The disk cache speeds up disk input and output by keeping the contents
of files in RAM, rather than immediately reading or writing them on
the disk.
The problem with using a large disk cache is that when you save
information, the data may end up staying in the cache for quite a
while before it really gets written to your hard disk. If your Mac
crashes before the cache gets saved, your data is lost.
CacheSaver addresses this problem by periodically saving (or
"flushing") the disk cache, thus minimizing data loss should your
Macintosh crash while you are working. You can set CacheSaver to flush
the cache whenever your Mac is idle for more than a specific amount of
time, or it can do it automatically at regular intervals. CacheSaver
also provides a hotkey so you can flush the disk cache manually.
