On Oct 21, 2008, at 8:56 AM, Jeffrey Engle wrote:

>
> Just curious.... using an external FW800 drive to boot from, when the
> system boots, activity monitor say's that mds (root) and mdworker
> (user) eat up 50-90 percent of my processor? what with that? thanks,
> Jeff

mds and mdworker are the two 'under the hood' parts of Spotlight. When  
they're doing stuf fit's not unusual fro them to glom on to as much  
CPU as everything else will let 'em.

The key here  is as everything else will let them. Those processes  
will surrender CPU to almost any other process, so you only see the  
really high CPU load when a) your computer isn't doing anything else  
and B) they have a lot to index.

If they're ramping up all the time, your Spotlight indexes may well be  
corrupted.

here is a good spotlight troubleshooting guide:

<http://www.thexlab.com/faqs/stopspotlightindex.html>

When I had this problem the solution was:

using the mdutil command to stop indexing on all my volumes :

sudo mdutil -i off /path_to_volume

Then disabling spotlight:

modify /etc/hostconfig to read:
SPOTLIGHT=-NO-
Then to get rid of the existing index, run these two commands from  
Terminal:
mdutil -i off /
mdutil -E /
Then rebooting.
Find the hidden directories ".Spotlight-V100" (if any) at the root of  
each volume and delete them.
Then I rebooted, turned Spotlight back on, re-enabled indexing
modify /etc/hostconfig to read:
SPOTLIGHT=-YES-
mdutil -i ON /
and then, crucially, LEFT THE SYSTEM ALONE for the couple hours it  
took to properly index everything.
After that, not a problem from Spotlight.
You'll still see those two processes running a lot and glomming ontp  
CPU, but only whil your computer is unoccupied doing anything else.


-- 
Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group

Institutions do not have opinions, merely customs



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