max tuple size and filesystem block size

From: "Robert B(dot) Easter" <reaster(at)comptechnews(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: max tuple size and filesystem block size
Date: 2000-05-16 18:41:10
Message-ID: 00051614593900.01809@comptechnews
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This has been answered many times I guess:

My linux filesystem is using a 4k block size. Does this mean that I can only
store up to 4k in a tuple? Where exactly does that 8k limit come from? If
Postgres is limited to 8k per tuple on my system right now, then it would use 2
blocks.

It has been said that Postgres can use up to 32k per tuple. Is the max kb per
tuple equal to the block size of the filesystem? That is, if I want 32k max
tuple size, I have to put Postgres on a filesystem that is using 32k blocks
(or 16k??) ?

I'm confused! :)

--
Robert B. Easter
reaster(at)comptechnews(dot)com

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