Re: hang with raid, postgresql
From: Scott Long (scottl_at_freebsd.org)
Date: 06/01/04
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Date: Tue, 01 Jun 2004 08:47:51 -0600 To: Don Bowman <don@sandvine.com>
Please try the latest aac driver sources.
Scott
Don Bowman wrote:
> I have a system with 2x 2.8GHz XEON (P4), intel e7501 chipset,
> 4GB of ram, aac [adaptec 2200s] raid with 4 scsi
> disks. I have also tried asr (adaptec 2015).
> I have tried two different motherboards.
> The only application the machine runs is postgresql,
> with about ~30 databases, about ~250GB of data.
>
> I'm finding the machine locks up solid once a day
> or so (sometimes more, sometimes less, no pattern
> of time of day). I know its not a hardware issue, it
> is reliable with FreeBSD 4.7. I've run through memory
> test, disk test, etc.
>
> There appears to be a correlation between
> disk activity (postgresql vacuum) and the lockup,
> but i can't be sure.
>
> I've just reproduced it with a cvsup from head today
> [2004-05-30 12:00 EDT], so its still present.
> I've got a serial console, and the break to
> debugger (which works under normal circumstances).
>
> In the lockup case, i cannot drop into db, and
> no output appears anywhere. I have enabled
> the following options, but still no affect, no
> messages come out (other than erroneous LOR
> issues).
>
> options ALT_BREAK_TO_DEBUGGER
> options DDB
> options INVARIANTS
> options INVARIANT_SUPPORT
> options WITNESS
> options WITNESS_SKIPSPIN
> options MUTEX_DEBUG
> options DIAGNOSTIC
>
> i've tried both with and without ACPI. It
> does not have PAE configured in.
>
> The fact that i can't drop into the debugger
> using the CR ~ ^B sequence when its locked up
> implies that its no longer servicing the serial
> interrupt.
>
> Does anyone have any suggestions? postgresql
> makes use of disk, sysv semaphores, shared memory,
> etc.
>
> I don't have sound, vga, X, ... any of the
> 'complicated' things, its just a server.
> There is no ATA.
>
> I tried setting kern.smp.active to 0, but
> it still locked up.
>
> I'm looking for any suggestions. I have
> attached the config file from it if anyone
> has any comments on that.
>
> --don
>
>
>
>
> ------------------------------------------------------------------------
>
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