Re: what are clog and xlog?

From: "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov>
To: <flyusa2010(at)gmail(dot)com>,<pgsql-hackers(at)postgresql(dot)org>
Subject: Re: what are clog and xlog?
Date: 2010-12-05 14:30:25
Message-ID: 4CFB4DA402000025000382D7@gw.wicourts.gov
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flyusa2010 fly wrote:

> clog is for commit log (very unclear for me ...)

It is an important part of tracking tuple visibility.

You might want to start with this page:

http://wiki.postgresql.org/wiki/Hint_Bits

-Kevin

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