Alexandros Fragkiadakis writes:
-------------------------------------------------------------------------i'm using suse. I don't know if the system crashes because of the operating system.
An entire system can crash _only_ because of the operating system.There is absolutely NOTHING that *any* application -- whether it's Courier-IMAP, emacs, the 'ls' command, or anything else you may run -- can do that should be able to crash an entire system. That's what the operating system's job is: run applications and prevent them from crashing the entire system.
Does the high CPU utilisation mean that Courier does not use DMA to read data from the disk?
Courier does not "use DMA", and there's no such thing in the first place. Courier reads and writes files. It is the operating system that figures out what needs to be done for that to happen. If your system does not use DMA for disk access, that's going to be the case for anything that reads or writes files, Courier, emacs, whatever…
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