high load

Hello

am facing problems since installed VBSEO

high load load average: 6.36, 4.17, 2.23, mysql crashed.

i disabled all plugins

PHP Code:

 
User-agent: *
Disallow: /board/calendar.php
Disallow: /board/faq.php
Disallow: /board/register.php
Disallow: /board/attachment.php
Disallow: /board/subscription.php
Disallow: /board/payments.php
Disallow: /board/private.php
Disallow: /board/sendmessage.php
Disallow: /board/showgroups.php
Disallow: /board/reputation.php
Disallow: /board/report.php
Disallow: /board/threadrate.php
Disallow: /board/newthread.php
Disallow: /board/showpost.php
Disallow: /board/search.php
Disallow: /board/newreply.php
Disallow: /board/login.php
Disallow: /board/image.php
Disallow: /board/cron.php
Disallow: /board/joinrequests.php
Disallow: /board/usercp.php
Disallow: /board/printthread.php
Disallow: /board/editpost.php
Disallow: /board/profile.php
Disallow: /board/postings.php
# Forums
User-agent: *
Disallow: /board/f37.html
Disallow: /board/f38.html
Disallow: /board/f97.html
User-agent: Slurp
Crawl-delay: 172800 


also i moved .htaccess to httpd.conf

VPS
512 RAM

around 150 visitors anytime

plz help

Hello,

please check Optimization Tweaks? for performance improvement suggestions.