Mathematica 7 high cpu usage on linux kernels 2.6.28+
aboSamoor | July 22, 2009 | 11:52 amAccording to the email from then wolfram support, there is a patched shared libraries for the new linux kernels. Apparently, Mathematica having problems running on 2.6.28+. I followed the email of the technical support and it worked for me 
and the cpu usage dropped from 80%+ on average to less than 5% !!!
The solution as mention in ubuntu forums [1]
- Download the file here:
- Place the shared library in
/usr/local/Wolfram/Mathematica/7.0/SystemFiles/Libraries/Linux - Download these files:
http://download.wolfram.com/?key=MK4ZR8
http://download.wolfram.com/?key=YHDAH4 - Place them in
/usr/local/Wolfram/Mathematica/7.0/SystemFiles/Libraries/Linux-x86-64
Good Luck 
I love it! That is way cool man! The steps
VitalikGromovss | September 9, 2009 | 8:57 amI love it! That is way cool man! The steps weren’t that complicated too, which is great.
Thanks a lot for this hint!
jam | November 7, 2009 | 9:59 amThanks a lot for this hint!
I can confirm this works.
atom | November 13, 2009 | 8:52 amI can confirm this works.
Thanks a lot man. Wolfram has deleted the files needed but
nzfonx | February 6, 2010 | 10:12 pmThanks a lot man.
Wolfram has deleted the files needed but I managed to find them here:
http://ubuntuforums.org/showpost.php?p=7486232&postcount=46
I copied the files in both /usr/local/Wolfram/Mathematica/7.0/SystemFiles/Libraries/Linux
and /usr/local/Wolfram/Mathematica/7.0/SystemFiles/Libraries/Linux-x86-64
Cpu usage dropped from 28-30& to 1-2% when Mathematica is idle.
I’ve also done what post #48 suggests and deactivated Java Library with
chmod a-x /usr/local/Wolfram/Mathematica/7.0/SystemFiles/Links/JLink
Hope this helps
,
S~