Dump size bigger than pgdata size?
| От | Nicola Mauri |
|---|---|
| Тема | Dump size bigger than pgdata size? |
| Дата | |
| Msg-id | OF406B6E88.F5B37D76-ONC1257194.004D5FAC-C1257194.004F9F44@saga.it обсуждение исходный текст |
| Ответы |
Re: Dump size bigger than pgdata size?
Re: Dump size bigger than pgdata size? Re: Dump size bigger than pgdata size? |
| Список | pgsql-admin |
[sorry if this was previously asked: list searches seem to be down]
I'm using pg_dump to take a full backup of my database using a compressed format:
$ pg_dump -Fc my_db > /backup/my_db.dmp
It produces a 6 GB file whereas the pgdata uses only 5 GB of disk space:
$ ls -l /backup
-rw-r--r-- 6592715242 my_db.dmp
$ du -b /data
5372269196 /data
How could it be?
As far as I know, dumps should be smaller than filesystem datafile since they do not store indexes, etc.
Database contains about one-hundred-thousands binary images, some of which may be already compressed. So i tried the --compress=0 option but this produces a dump that does not fit on my disk (more than 11 GB).
I'm using postgres 8.1.2 on RHEL4.
So, what can I do to diagnose the problem?
Thanks in advance,
Nicola
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