Sleep and maintenance issues

I understand that the Mac will perform routine maintenance at night, if I do not allow the computer to sleep. But suppose I select "never" for computer sleep but check off "allow hard disc to sleep when possible". Will the computer still perform the maintenance? Also, I would like to know what maintenance is performed. Is it everything shown in the ONYX freeware?

But suppose I select "never" for computer sleep but check off "allow hard disc to sleep when possible". Will the computer still perform the maintenance
Yes.
Also, I would like to know what maintenance is performed. Is it everything shown in the ONYX freeware?
No, the only tasks that are run automatically are the periodic scripts.
See: http://docs.info.apple.com/article.html?artnum=107388
FWIW, The other scripts run by OnyX, Cocktail, Yasu, etc., are not considered to be a part of a normal maintenance regimen, though many people use them that way. Cleaning caches, deleting rotated logs and the rest are tasks that would be recommended as troubleshooting steps, and running them can slow performance (startup, application launches...) until these caches rebuild themselves.
Tuttle
1424/8132

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