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...It will ask for few permission:
grant select on gv_$active_session_history to $USER_NAME;
grant select on gv_$SQL to $USER_NAME;
grant select on gv_$SQL_MONITOR to $USER_NAME;
grant select on gv_$SQLSTATS to $USER_NAME;
grant select on v_$database to $USER_NAME;
grant select on gv_$instance to $USER_NAME;
grant select on gv_$statname to $USER_NAME;
grant select on gv_$sysstat to $USER_NAME;
grant select on gv_$osstat to $USER_NAME;
grant select on gv_$dlm_misc to $USER_NAME;
grant create session to $USER_NAME;
OraGlance is free software , use it as you like.
The sysstat utilities are a collection of performance monitoring tools for Linux. These include sar, sadf, mpstat, iostat, nfsiostat-sysstat, cifsiostat, pidstat and sa tools.
Sar2gp converts files generated by 'Sar' from Sysstat into Gnuplot format, and then generates the graphic. User can select which values wants to be plotted. Sar2gpGUI is a graphical user interface that can deal with all Sar2gp options.
Command line tool that creates charts from SysStat output and presents them through HTML pages. It is also capable to display charts from several machines at a single site.