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Re: [PERFORM] psql -A (unaligned format) eats too much memory

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com>
Cc: Zoltan Boszormenyi <zboszor(at)dunaweb(dot)hu>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: [PERFORM] psql -A (unaligned format) eats too much memory
Date: 2006-06-05 15:27:30
Message-ID: 20512.1149521250@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-performance
"Jim C. Nasby" <jnasby(at)pervasive(dot)com> writes:
> I've been able to verify this on 8.1.4; psql -A -t -c 'SELECT * FROM
> largetable' > /dev/null results in psql consuming vast quantities of
> memory. Why is this?

Is it different without the -A?

I'm reading this as just another uninformed complaint about libpq's
habit of buffering the whole query result.  It's possible that there's
a memory leak in the -A path specifically, but nothing said so far
provided any evidence for that.

			regards, tom lane

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