Problems with Magento Cacheing

#1
We are having a problem when we enable our Magento cache, our site grinds to a slow slow halt. Once we delete the cache folder everything start working again. Somehow Litespeed is not reading the cache correctly.

I have two Enterprises licenses.
 
#3
It writes to the $siteroot/var/cache folder and should be nobody. I have 7 servers on a load balancer, but I only have the problem with the two servers that run enterprise. I have 4 on Litespeed std and 1 on apache. They all behave normally?
 
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