Re: WAL format

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: WAL format
Date: 2009-12-07 20:28:08
Message-ID: 20091207202807.GL3552@alvh.no-ip.org
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Heikki Linnakangas wrote:

> - at the end of WAL segment, when there's not enough space to write the
> next WAL record, always write an XLOG SWITCH record to fill the rest of
> the segment.

What happens if a record is larger than a WAL segment? For example,
what if I insert a 16 MB+ datum into a varlena field?

--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.

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  • WAL format at 2009-12-07 19:28:38 from Heikki Linnakangas

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