What metric captures why my OSX machine is so slow during XCode indexing

Posted by Ben Flynn on Super User See other posts from Super User or by Ben Flynn
Published on 2012-09-06T21:00:11Z Indexed on 2012/09/06 21:42 UTC
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osx-lion

My entire machine OSX Lion machine slows down while XCode 4.4 is indexing. The CPU is less than 10% busy, I've got over 500 MB free memory, plenty of disk space, disk IO rate is not high, network activity is not high. Indexing just a few files can take minutes and builds are extremely slow. While this is going on, even loading a new web page in Chrome can be slow.

Knowing how to fix it would be great, but more fundamentally how can I measure what is actually going slowly? What metrics should I be looking at? Nothing in Activity Monitor, iostat, top, or sar betray anything about what's going on to me. Even getting a man page is interminable.

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