There have been postings in various forums suggesting that either the dynamic pager in Mac OS X 10.7.4 or the new Safari 5.1.7 cause Lion to stop having so many virtual memory swapfiles in comparison to Snow Leopard.
I avoided installing Safari 5.1.7 when it became available, to see if the 10.7.4 update had any effect on the number of swapfiles I have on my iMac (July 2010) with 8 GB of RAM. So far, I have only one swapfile, created right during the automatic restart that followed the installation of the 10.7.4 update. I am keeping the path /private/var/vm in the Finder's Go to Folder feature, in the Go menu, and checking it every few hours. I hope to see no repeat of the 19 swapfiles incident I had a few months ago.
