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postGresql Consulting ??

P: n/a
Hi Guys,

Do you know any companies in the San Diego Area(or nearby) who can give
consulting expertise. This is for getting us up and running with postGresql

I would appreciate if I can get emails addresses/compnaies names who do this

-----Original Message-----
From: pg*****************
[mailto:pg*****************] On Behalf Of Tom Lane
Sent: Tuesday, January 20, 2004 9:05 AM
To: Jared Carr
Cc: pg***********
Subject: Re: [GENERAL] Getting rid of duplicate tables.
Jared Carr <ja***> writes:
Item 2 -- Length: 148 Offset: 6860 (0x1acc) Flags: USED
XID: min (46034931) CMIN|XMAX: 2 CMAX|XVAC: 0
Block Id: 27 linp Index: 2 Attributes: 23 Size: 28
infomask: 0x2910 (HASOID|XMIN_COMMITTED|XMAX_INVALID|UPDATED) Item 43 -- Length: 148 Offset: 8044 (0x1f6c) Flags: USED
XID: min (8051642) CMIN|XMAX: 46034931 CMAX|XVAC: 2
Block Id: 27 linp Index: 2 Attributes: 23 Size: 28

Well, there's the smoking gun ... somebody marked (27,2) as XMIN_COMMITTED,
showing that they thought 46034931 was committed, while someone else marked
(27,43) as XMAX_INVALID, showing that they thought 46034931 was aborted. So
we have some kind of very-infrequent breakage in transaction commit-state
lookup. Or a hardware problem, but I suspect we are looking at a bug.

Could you check out what pg_clog has for transaction 46034931? This would be
pg_clog/002B (which dates your problem to Dec 29 BTW), byte at offset 39BFC
hex or 236540 decimal. I forget which way the bits run within the byte but
will look it up if you can get me the value of that byte.

I'm off to take a real close look at what was done to the pg_clog code
during the 7.4 cycle ...

regards, tom lane

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Nov 22 '05 #1
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