Re: freebsd + postgresql 8.3.3 = 100% of cpu usage on stats collector?

hubert depesz lubaczewski <depesz@depesz.com> writes:
>  58241 postgres CALL  poll(0x7fffffffd4e0,0x1,0x7d0)
>  58241 postgres RET   poll -1 errno 4 Interrupted system call
>  58241 postgres CALL  poll(0x7fffffffd4e0,0x1,0x7d0)
>  58241 postgres RET   poll -1 errno 4 Interrupted system call
>  58241 postgres CALL  poll(0x7fffffffd4e0,0x1,0x7d0)
>  58241 postgres RET   poll -1 errno 4 Interrupted system call
>  58241 postgres CALL  poll(0x7fffffffd4e0,0x1,0x7d0)
>  58241 postgres RET   poll -1 errno 4 Interrupted system call
>  58241 postgres CALL  poll(0x7fffffffd4e0,0x1,0x7d0)
>  58241 postgres RET   poll -1 errno 4 Interrupted system call

Hmm.  The wait-for-input loop in the stats collector assumes that
if it gets EINTR, it should just retry the poll() call immediately.
Which AFAIK is correct.  I think you're looking at a kernel or libc
bug here --- somehow the EINTR failure is recurring continuously.
It's probably time to ask about this on a FreeBSD-specific list.

            regards, tom lane