Thanks Jon and all others for your great suggestions.

As Jon said, I'm drawing towards the conclusion that the
issue was with some bug or incompatibility between FreeBSD 7
and MySql 5.1. FreeBSD 7 has a new scheduler but by default
it still uses the older one. Things seemed to be much better
after we recompiled the kernel with the new scheduler.

>Also - My custom kernel config has to following
non-standard options

>options         HZ=2000
>options         SCHED_ULE               # ULE scheduler
>options         PREEMPTION              # Enable kernel
thread preemption
>options         FULL_PREEMPTION         # Enable kernel
thread preemption
>options         IPI_PREEMPTION          # Enable kernel
thread preemption
>options         SMP

Khanh
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