Re: pg_dump issues

DM a écrit :
> Hi All,
>
> I have a database with only one schema with 5 tables
>
> nspname | relname | size
> ---------+---------------------+---------
> sch | job1 | 211 MB
> sch | job2 | 5611 MB
> sch | job3 | 6584 kB
> sch | job4 | 89 MB
> sch | job5 | 39 MB
>
> Total sum of sizes of the table is less than 6 GB.
>
> When I do a pg_dump of this database it is 20GB (I also did a pg_dump of
> only schema data and the size was still the same). I am using postgres
> 8.4.1 version.
>
> Could any one explain why the pg_dump size of the file is 3 times the
> size of the tables?

Because it doesn't only contains the fields values but also the full
set of commands to restore (remake) it identical (and it's text).
Also, if you use UTF-8, some chars take more than one byte per each.

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