"Andrus" <[EMAIL PROTECTED]> writes:
> I created query returning biggest tables with and without indexes and found:

>       1  pg_toast_22185                      95 MB           96 MB

> 1. Tables are relatively small and thus cannot create 125 MB compressed 
> backup file.

You have failed to consider that data that goes into a toast table is
usually compressed first.  The above table is probably accounting for
close to 100MB of compressed dump output.

                        regards, tom lane

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