Currently Being ModeratedMar 3, 2013 11:54 AM (in response to IA64)
You can try resetting safari to clear caches and other items that might be contributing to a mishandling of data that leads to the high resource usage. This can be done in the Safari menu, and by enabling the develop menu in its Advanced preferneces followed by choosing the option in here to empty the browser's cache.
Currently Being ModeratedMar 3, 2013 1:28 PM (in response to Topher Kessler)
I already cleared the cache by deleting the cache.db file and tried the PRAM ( P+R+CMD+OPT ). Tried also turning off the iMac and holding the power button for 10 seconds. Nothing helped.
I am afraid that the test in safe mode is not practical since I need a to have a long session ( 1 day or so ) of browsing which is not very friendly under safe mode.
What's the difference between Safai and Safari web content ? And that error when closing tabs, is it related to anything ?
I am looking at the update history and looks like the issue started after updating Java to 1.7.0_15. Needs to be confirmed by someone.
Currently Being ModeratedMar 3, 2013 3:28 PM (in response to IA64)
The error when closing tabs means nothing. If the Java update is temporally related to the problem, disable Java and test. You should do that anyway, as it's unsafe to leave Java enabled all the time.
Currently Being ModeratedMar 3, 2013 4:39 PM (in response to Linc Davis)
Unsafe to leave Java enabled all the time ? pardon me but Java doesn't run unless you give it the permission. That's the case after the latest update.
Currently Being ModeratedMar 3, 2013 4:44 PM (in response to IA64)
That's right, but if you haven't enabled Java, then it has nothing to do with your problem.
Currently Being ModeratedMar 5, 2013 11:24 AM (in response to IA64)
I was also experiencing this (eating up 8-12 GB of RAM, fans kick on, everything hangs - even Force Quit, and spinning beachball) and switched to Chrome as my primary browser as a result. I hadn't experienced it for a couple months until just now. I had Facebook open all times this has happened, so I wonder if there is something at Facebook.com that Safari gets hung on.
Originally I uninstalled Flash and that did the trick. But now obviously it seems there was something else contributing to the problem.
Java has been disabled for quite awhile in preferences, but I did have some old extensions still active (like Omnibar) which I have deleted. I even deactivated extensions all together. So far so good.
I'm running 10.8.2 with Safari 6.0.2 on a 2010 17" MacBook Pro.
I think I'm sticking with Chrome.
Currently Being ModeratedApr 4, 2013 7:39 AM (in response to IA64)
Best solution so far :
Remove Safari from my dock.. Installed Chrome and never had any single issue.
I have more than 30 tabs opened ( facebook , 4 forums, youtube, twitter etc.. ) and not a single lag. Memory is still 80% free.
I wish I could use the default browser in Mac but it's a hopelss case.
Currently Being ModeratedOct 23, 2013 8:37 PM (in response to IA64)
You may have already solved the mystery of Safari Web Content using up so much memory or Ram. All you will need to do is go to the Safari Menu and select Reset Safari and check all the boxes. allow about a minute or two during the reset and your safari will be back to normal. I reclaimed about 2GB of memory.
Also web content can be limited