You’ve created a brand new instance or cloned Live into Staging; now you need to take it out of archivelog mode to boost performance.

create pfile from spfile;

then edit the pfile (.../dbs/initSID.ora) to include *.log_archive_start=FALSE, then take a backup, then continue with

shutdown immediate;
create spfile from pfile;
startup mount;
alter database noarchivelog;
alter database open;

then confirm the change with

archive log list;
shutdown immediate;

You then need to take a backup because all previous backups are now invalid.

In 11g you can/should omit the editing of the s/pfile since that is deprecated; in 11g the archivelog mode is stored in the control file(s).