oracle 9i automatic undo management - space usgae 100%

I have oracle 9i database on HP UNIX 11i with automatic undo management. I created
undo tablespace to be 1800M. When I look in OEM, storage, it shows undo tablespace as 100% used, but I do not see any errors in alert.log file and any other errors. Is this normal, i.e., is I cause for concern. I have following parameters in "init.ora"

undo_management                      string      AUTO
undo_retention                       integer     604800
undo_suppress_errors                 boolean     FALSE
undo_tablespace                      string      UNDOTBS1

it maybe that I have asked undo_retnetion to be too large, but my unerstanding is that Oracle will ingnore this parameter if there is not enough space anyway?

Thanks,
Prem Received on Fri Dec 10 2004 - 10:31:34 CST