My Favorite SAP T Codes

My favorite TC on SAP
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SM04 - Displays the logged in users of the SAP system
SM12 - Displays and deletes Lock entries
SM51 - Display SAP instances of an SAP system -status and complete work process
SM37 - Monitor batch jobs
SM49 - run external OS commands
SMICM - ICM monitor
SMGW - Gateway monitor
AL12 - Buffer Monitor
ST01 - system trace
ST02 - Memory monitor
ST03N- Load monitor
ST05 - Performance analysis

Oracle Related
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DBA Cockpit - system configuration and Maintenance
DB01 - Oracle Lock Monitor
DB02 - Database Performance
DB12 - Backup Logs
DB13 - DBA planning Calenar
DB16 - Database checks - for error mssgaes and warnings
DB17 - Check conditions when using BR Tools
DB26 - Database parameters
DBC0 - Database connections
ST04N- Database Performance monitor

Operating system
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OSO6 and STO6 - OS Monitor
OSO2 and OSO4 - OS configuration