>>>>> "Michael" == Michael Lake <[EMAIL PROTECTED]> writes:
Michael> Questions: What is 'uninterruptable sleep' ? Anyhow pointers
Michael> on how I can speed things up. Why oh why might a few dozen
Michael> images / 200 take so long when others take 30 seconds?
Uninterruptible sleep is generally waiting for disk I/O -- either swap
or input.
Possibilities are:
-- a few bad sectors on the disc causing timeouts and retries
(check dmesg output)
-- you've gone over a boundary that means mogrify is using
enough memory to need to swap (although I can see no sign
of swap usage in your `top' snapshot)
-- Beginning to run out of disk space meaning that the
filesystem has to do a lot of work to allocate space for
temporary files or output files.
-- Disc fragmentation for those files, meaning lots of seek
activity to read them.
Try copying the problematic files to a different filesystem and running
your rotate again.
--
Dr Peter Chubb http://www.gelato.unsw.edu.au peterc AT gelato.unsw.edu.au
http://www.ertos.nicta.com.au ERTOS within National ICT Australia
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