This is most likely a known problem with iChat in Tiger, rather than Folding. This AI article on the 10.4.2 update mentions the
iChat problem several times.
To change nice levels after a process has been launched, use the
renice command. Use 'top' to find the PID for the process(es) you are interested in. Then ...
renice -19
123 (resets PID 123 to max priority)
renice -10
123 (resets PID 123 to a high priority)
renice 0
123 (resets PID 123 to default priority)
renice 10
123 (resets PID 123 to a low priority)
renice 19
123 (resets PID 123 to minimum priority)
Notes:
• You have to be root to increase the priority of a process. Even if you had decreased the priority to a low level, you'd still need to be root to renice it back up to zero.
• The scale supposedly goes from -19 (max priority) to +20 (min priority), but I'm not sure if +20 works as expected under OSX. +19 definitely works, but some processes that I reniced to +20 seemed to be running at zero priority. This was under 10.2.8, so take it with a grain of salt. If it was broken under Jag, it most likely got fixed in later OSX versions.
• See "man renice" for a more complete explanation.
If you want to set priority when the process is launched, use the
nice command. See "man nice" for all the details.
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