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Compressing WAL

From: "Jim C(dot) Nasby" <decibel(at)decibel(dot)org>
To: pgsql-performance(at)postgresql(dot)org
Subject: Compressing WAL
Date: 2005-04-05 04:04:57
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Lists: pgsql-hackerspgsql-performance
Maybe better for -hackers, but here it goes anyway...

Has anyone looked at compressing WAL's before writing to disk? On a
system generating a lot of WAL it seems there might be some gains to be
had WAL data could be compressed before going to disk, since today's
machines are generally more I/O bound than CPU bound. And unlike the
base tables, you generally don't need to read the WAL, so you don't
really need to worry about not being able to quickly scan through the
data without decompressing it.
Jim C. Nasby, Database Consultant               decibel(at)decibel(dot)org 
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