mysqld_safe using high or 100% CPU
Both my network monitoring servers suffered this condition over the 2wks my company takes holidays for Christmas so I returned to work to find 2 VMs consuming 6ghz of CPU between them. A quick check of top showed mysqld_safe consuming 100% CPU on both VMs for no apparent reason.
After trying the usual /etc/init.d/mysql restart with no success, Google was my friend yet again. Turns out this is a common problem with MySQL 5.0.51 on Ubuntu so the procedure to recover is:
sudo /etc/init.d/mysql stop
sudo killall -9 mysqld_safe
sudo /etc/init.d/mysql start
In my journeys through many forums and blogs, I also discovered a great tool to help with MySQL performance issues: mytop. Basically it’s like the normal *nix “top” command, except for MySQL so you can see queries etc as they run.
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