sql Problem after upgrading to Joomla 2.5

Question:
hello,
Problem after upgrading to Joomla 2.5 from 1.5 by using com_spupgrade!
com_spupgrade page : http://extensions.joomla.org/extensions ... I7fQ%3D%3D
I've attached screenshot from my server root!
the site make server load average high and sql problem always:
Code:
Query SELECT a.id, a.title, a.introtext, a.fulltext,

i do optimize tables and repair tables but still problem!
any idea please?
sorrey for my bad english
thank you
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