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Re: [BUGS] My investigations of the postmaster Bus error

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>
Cc: Martin Pitt <martin(at)piware(dot)de>, Bugs <pgsql-patches(at)postgresql(dot)org>
Subject: Re: [BUGS] My investigations of the postmaster Bus error
Date: 2005-12-22 17:07:08
Message-ID: 23734.1135271228@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-bugspgsql-patches
Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> writes:
> I've been playing with the MIPS machine a little and still haven't found
> any _obvious_ cause for the problem.  However I suspect that it may be
> related to unaligned memory access, which _I think_ results in a SIGBUS
> on MIPS.  I haven't found any documentation on MIPS that would confirm
> this however.  I'm not sure exactly how would this by worked around; it
> occurs to me that we'd have to change config_real to look like

I don't think so --- to believe that the GUC data structures aren't
adequately aligned, you'd have to explain why PG doesn't crash on other
architectures that require 8-byte alignment of doubles, eg HPPA.

			regards, tom lane

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