Linked by Thom Holwerda on Mon 23rd Apr 2012 16:29 UTC
Mac OS X Adam Fields and Perry Metzger have been investigating the serious performance issues people are experiencing with Lion. "Frequent beachballs, general overall slowness and poor UI responsivness, specific and drastic slowdowns on every Time Machine run, high memory utilization in Safari Web Content, mds, and kernel_task processes, large numbers of page outs even with a good deal of available RAM, and high amounts of RAM marked as inactive which is not readily freed back to other applications, with page outs favored." Apparently the issue is that the "virtual memory manager is bad at managing which pages should be freed from the inactive state and which ones should be paged out to disk". I won't make myself popular with a certain part of our readership, but really, is this considered a new problem? Mac OS X has always had terrible memory management, and where Windows has continuously become better at it, Mac OS X seems to have been stagnant and even getting worse. This is what happens when the company earns 2/3s of its revenue somewhere else.
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Clean Install
by bowkota on Mon 23rd Apr 2012 19:38 UTC
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I've been managing ~ 10 Macs all with Lion almost since day one and I haven't had any problems.
The key is to do a clean install, never an upgrade. Most of the issues arise from upgrading.

There only problems I've documented and this is across the boar.
1. The OS freezing momentarily when watching Flash videos using Chrome. I don't use any Flash blocking tool, it's simply not installed on any machine. In its place there's Chrome and whenever I come a cross a website with Flash as the only alternative I fire up Chrome.
2. Safari pages going black/not responding when having many tabs open.

If you want a decent article on memory management in OS X, John Siracusa delves into the issue in all of his recent OS X reviews on Arstechnica.

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