Had a lot of server crashes during the last days with the server load going up to 190+ from time to time. After disabling eAccelerator and IonCube first I now upgraded to the latest Wp Supercache and when I activated it server load went up to 100, mysql crashed. Looks like I got a winner here ..
MySQL server has gone away on line: 124
This person has the same problem:
Also found a lot of these in my errro_log:
PHP Fatal error: Call to a member function get() on a non-object in /wp-includes/cache.php on line 93
After some tests, my theory is that WordPress.com changed their stats plugin and it is no longer compatible with Supercache. My setup worked for months and suddenly I get that high CPU load? Strange.
I have now disabled WP Stats and will report back here. So far it really looks promising..
Server load 50% down
Memory usage 50% down