Port Bug Report: pg_dump eats memory when making backup

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                        POSTGRESQL BUG REPORT TEMPLATE
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Your name               : Petter Reinholdtsen
Your email address      : pere@td.org.uit.no

Category                : runtime: front-end
Severity                : serious

Summary: pg_dump eats memory when making backup

System Configuration
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  Operating System   : Linux RedHat 5.2

  PostgreSQL version : 6.5

  Compiler used      : gcc 2.7.2.3

Hardware:
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Linux picknose.student.uit.no 2.2.10 #2 SMP Tue Jun 15 16:41:59 METDST 1999 i686 unknown
Pentium II 350 MHz 256MB RAM

Versions of other tools:
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Problem Description:
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When running 'pg_dump -D -a -n <database>' to make a backup
of the data, the pg_dump program gets enormous.  My database
makes a 104 MB backup file, and the pg_dump program had
~90MB memory usage.  Larger databases gives a bigger memory
footprint, sometime to much for the machine.

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Test Case:
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Solution:
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