Hi Rakesh
The parameter rspo/store_location determines where the tempse request would be stored in your systems :
a) file system (parameter value G)
b) table TST03 (parameter value db)
In your case , as the parameter is DB , hence the objects will be stored in the DB.
Please see the following link and the SAP Note
TemSe Data Store (SAP Library - SAP Printing Guide (BC-CCM-PRN))
20176 - Where is the spool request saved?
To clear old requests - you need to use RSPO1041
Thanks
Rishi