On Thu, 22 Mar 2001, Tom Lane wrote:
> Joel Burton <jburton@scw.org> writes:
> > I rebooted my machine, and it didn't happen again that night. Yesterday,
> > my staff reinstalled Pg straight from the CVS but without (!) tarring up
> > the old Pg install, so I'm afraid I don't have any logs. I run Pg w/debug
> > switches on my development machine; this machine did not have such.
>
> Drat.
>
> > I don't have a log, but do have the query that was issued, multiple times,
> > overlapping:
> > SELECT * FROM zope_facinst LIMIT 1000;
>
> It's really unlikely (I hope) that the clients running SELECTs had
> anything to do with it. You had mentioned that you were busy making
> manual schema revisions while this went on; that process seems more
> likely to be the guilty party. But if you don't have the logs anymore,
> I suppose there's not much chance of reconstructing what you did :-(
The dropping and re-making were the zope_facinst view listed in my email.
I was tinkering with various parameters, trying to see if distinct on
(list) was faster than distinct list, etc.
> I spent much of this afternoon groveling through the deletion-related
> code, looking for some code path that could lead to a deletion operation
> deleting the wrong file. I didn't find anything that looked plausible
> enough to be worth pursuing. So I'm stumped for the moment. We'll have
> to hope that if it happens again, we can gather more data.
It could be my machine; it's not a heavily used machine, so I can't vouch
for its stability.
Sorry I couldn't help more.
As always, thanks.
--
Joel Burton <jburton@scw.org>
Director of Information Systems, Support Center of Washington
