buffer freelist

From: Halley Pacheco de Oliveira <halleypo(at)yahoo(dot)com(dot)br>
To: pgsql-docs(at)postgresql(dot)org
Subject: buffer freelist
Date: 2005-07-07 10:29:33
Message-ID: 20050707102933.40007.qmail@web52710.mail.yahoo.com
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PostgreSQL 8.0.3 Documentation
Chapter 16. Server Run-time Environment
16.4. Run-time Configuration

debug_shared_buffers (integer)

Number of seconds between buffer freelist reports. If set greater than zero, emit freelist
statistics to the log every so many seconds. Zero (the default) disables reporting.

What is a buffer freelist? I can't find a definition, and I can't translate if I don't understand.

Is it a list of free buffers as it seems to be? What is a free buffer?

Thanks,
Halley

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