Sys user unable to do anything

Hi,
the setup is oracle 10g running on solaris 10.
Recently, we faced a issue where no user was able to establish connection to the database, this we found to be due to a parameter processes=150, however even sys user was not able to perform any operations like 'select', 'shutdown of the database', etc etc. Finally i did kill the pmon process and then restarted the db and set processes=200.
My Query is if there was a better way to handle the above situation, where there sys user can just login, but cannot perform any query/actions.

the setup is oracle 10g running on solaris 10.
Recently, we faced a issue where no user was able to establish connection to the database, this we found to be due to a parameter processes=150, however even sys user was not able to perform any operations like 'select', 'shutdown of the database', etc etc. Finally i did kill the pmon process and then restarted the db and set processes=200.
My Query is if there was a better way to handle the above situation, where there sys user can just login, but cannot perform any query/actions.I think it is possible to start a new session and do such operation using sys user using a BEQUETH session. Login to your host server. Set the oracle_sid and connect as sysdba provided the user through which you logged in should be a member of dba group.
Regdards.

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