Re: Serious Crash last Friday

aha! no, i didn't check the mem yet. but it seems like it's worth to
buy new ECC-RAM chips, if only ONE SINGLE FAULTY BIT can cause such
trouble!!

thanks for the detailed examination!

Mit freundlichem Gruß

Henrik Steffen
Geschäftsführer

top concepts Internetmarketing GmbH
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----- Original Message -----
From: "Tom Lane" <tgl@sss.pgh.pa.us>
To: "Henrik Steffen" <steffen@city-map.de>
Sent: Thursday, July 11, 2002 3:50 PM
Subject: Re: [GENERAL] Serious Crash last Friday


> oh, ignore previous message --- it's still too early in the morning.
>
> What you seem to have here is a single bit flip:
>
>  Item 109 -- Length:   16  Offset: 6432 (0x1920)  Flags: USED
>   Block Id: 1048595  linp Index: 3  Size: 16
>   Has Nulls: 0   Has Varlenas: 0
>
>   1920: 10001300 03001000 d1930100 02000000  ................
>
> Judging from the surrounding items, the block id in this entry should
> have been 19 (hex 00000013) ... but it's actually 00100013.  Everything
> else looks fine on the whole page.
>
> My bet is that you have a bad RAM chip that allowed the bit to flip
> while the index page was in memory.  Single-bit changes aren't usually
> what I'd expect from either software bugs or disk-related hardware
> failures.
>
> Have you done anything yet with that memory test program that some other
> folks recommended?
>
> regards, tom lane