I've got MacBook Pro 2011, 15" i7 2GHz 8GB Ram 1333 MHz OS X Lion 10.7.2 all updates installed released to this date. I have done everything what I can to minimize RAM consumpsion and the only problem I've got at this point is when I run Xcode. I had 4gigs of RAM, than bought 8 gigs and always 've got 10-30 MB of free memory after 3-5 minutes of Xcode running and PAGE INS are 300MB - 700MB. I tried to switch to 32-bit running mode but no change. Can anybody help me please?
Yes. One way is to disable indexing, another is to reduce the number of build processes. These are hidden preferences in Xcode 4 which I have detailed here:
I've also made a pretty extensive write up for improving and working with Xcode's resource issues:
来源：https://stackoverflow.com/questions/7926491/mac-os-x-lion-10-7-2-xcode-4-2-memory-issues