Disk Space issue

Hi,

We are using PostgreSQL 7.4.5 and facing issues with increasing disk space.

Here is some information about our configuration.

The data dump size is around 3 GB. And it is occupying around 120GB on the disk. When we recreate the database from
datadump it takes around 3.5GB of disk space. 
But the database size increases by 1 GB daily though actual data added maybe in KB. We are not able to decipher as to
whatis causing this increase. 

Suggestions on the likely problems will be appreciated.

Regards,
Devendra

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