Essential SAP Transaction Codes for Production Support and Critical Issue Analysis

T-code	Purpose
SU01D	Display a user’s account details, assigned roles, and user status.
SUIM	Search and report on users, roles, profiles, and authorizations.
SE10	Manage transport requests and tasks, including reviewing and releasing them.
SM37	Monitor background jobs: status, schedule, job log, and spool output.
SE37	Display and test function modules, including RFC-enabled modules.
SA38	Execute an ABAP report by entering its program name.
SE16H	Browse and analyze table data, with filtering and additional analysis features.
SE16N	Display table contents with selection filters. Use carefully; access to sensitive data may be  restricted.
SE11	Display or maintain ABAP Dictionary objects such as tables, views, data elements, and structures.
ST22	Review ABAP runtime errors (short dumps) and their technical details.
SM21	Review system log entries, such as system events and errors.
SLG1	Display application logs for business processes and programs.
SM13	Monitor update requests and investigate failed updates.
SM58	Check transactional RFC (tRFC) calls that are waiting or have failed.
SMQ1	Monitor outbound queued RFC (qRFC) queues.
SMQ2	Monitor inbound qRFC queues.
WE02	Display and analyze IDocs, including status, segments, and errors.
SU53	Show the last failed authorization check for the current user.
SM12	Display and manage SAP lock entries. Don’t delete locks without confirming they’re stale and safe to remove.
SM50	Monitor work processes on the current application server.
ST05	Trace performance activity, such as SQL statements and RFC calls, for troubleshooting.