descriptors in buffer manager?

From: "Frank Guan" <fguan253(at)hotmail(dot)com>
To: pgsql-hackers(at)postgresql(dot)org
Subject: descriptors in buffer manager?
Date: 2003-02-10 06:25:12
Message-ID: b27gkt$1pp7$1@news.hub.org
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Hi,

This is my first time posting. I'd like to ask about the source code for
postgresql, in particular the buffer manager code. What do all the various
descriptors do? (i.e. free_list_descriptor, data_descriptor) I can't find
comments that explain their function =(.

Frank

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