Saving off the transaction log WAL files is a good way to do this.
Read this part of the manual:
http://www.postgresql.org/docs/8.4/interactive/continuous-archiving.html
...and see if that answers your questions.
On Nov 9, 2009, at 6:48 PM, akp geek wrote:
> Dear all -
>
> Is there way to create incremental backups in
> postgres. I am currently using 8.4.1 on solaris. I am new to
> postgres. Can you please share your thoughts
>
> Regards