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Re: crash on 8.2 and cvshead - failed to add item to the

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Heikki Linnakangas <heikki(at)enterprisedb(dot)com>
Cc: Joe Conway <mail(at)joeconway(dot)com>, "Hackers (PostgreSQL)" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: crash on 8.2 and cvshead - failed to add item to the
Date: 2007-01-26 15:05:10
Message-ID: 23777.1169823910@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Heikki Linnakangas <heikki(at)enterprisedb(dot)com> writes:
> Tom Lane wrote:
>> I'm still wondering why the bug isn't seen in 8.1.

> The hardcoded fillfactor was 90% when building an index, and that's 
> still the default. However, when inserting to an existing index, the 
> fillfactor on the rightmost page was 2/3. It was changed to use the 
> user-configurable fillfactor, which now defaults to 90%.

Ah.  I thought I remembered that those had been two separate changes,
but you're right, 8.1 and before always split 1:1 or 2:1.  So it'd take
a really nasty corner case to expose the bug there.

			regards, tom lane

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