ORA-1653: unable to extend table SYS.AUD$ by 5314958 in tablespace SYSTEM

Issue:

DB reported slowness with the following error in DB

ORA-1653: unable to extend table SYS.AUD$ by 5314958 in tablespace SYSTEM
ORA-1653: unable to extend table SYS.AUD$ by 5314958 in tablespace SYSTEM

Solution:

Check with the audit maintenance and can delete if it a non prod db:

delete from SYS.AUD$ where ROWNUM <1000001;