Actually on my Linux system it the mysqld process has the hghest CPU:

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND

 2560 mysql     20   0  408m 2372  692 S   53  0.1 155:39.60 mysqld

On kreebsd-i386 its low
74852 mysql    128   0  223m  32m    0 S   0.0  1.6   3:30.71 mysqld



I tried an strace

root@taylor:/tmp# strace -p 2560
Process 2560 attached - interrupt to quit
restart_syscall(<... resuming interrupted call ...>

I'm thinking what else I can do to investigate.

On 01/07/12 03:55, Julian Gilbey wrote:
> Package: mysql-server-core-5.5
> Version: 5.5.24+dfsg-4
> 
> My mysqld recently started using loads of CPU, on two different
> computers.  There was no obvious reason, and restarting the daemon did
> not appear to help.  Finding a thread about mythtv suggested a
> possible reason: the leap second which occurred at 23:59:60 GMT on 30
> June 2012 (about 3 hours ago now).  Rebooting the computer seems to
> have sorted the problem.
> 
> Obviously, this is going to be hard to reproduce and test - either it
> will have happened to lots of people or not, and it probably won't be
> reproducible until the next leap second occurs :-(
> 
> I'm running kernel 3.2.0-2-amd64 (linux-image 3.2.20-1) and running
> ntpd.
> 
>    Julian
> 
> 
> 
> _______________________________________________
> pkg-mysql-maint mailing list
> pkg-mysql-ma...@lists.alioth.debian.org
> http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-mysql-maint
> 




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