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Re: WIP: Fast GiST index build

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Alexander Korotkov <aekorotkov(at)gmail(dot)com>
Cc: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: WIP: Fast GiST index build
Date: 2011-08-03 12:59:47
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Lists: pgsql-hackers
On Wed, Aug 3, 2011 at 4:18 AM, Alexander Korotkov <aekorotkov(at)gmail(dot)com> wrote:
> I found that in previous version of patch I missed PageSetLSN
> and PageSetTLI, but huge amount of WAL is still here. Also I found that huge
> amount of WAL appears only with -O2. With -O0 amount of WAL is ok, but
> messages "FATAL:  xlog flush request BFF11148/809A600 is not satisfied ---
> flushed only to 44/9C518750" appears. Seems that there is some totally wrong
> use of WAL if even optimization level does matter...

Try setting wal_debug=true to see what records are getting emitted.

Robert Haas
The Enterprise PostgreSQL Company

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