To list the event name internal documentation commands use ORADEBUG DOC EVENT NAME:
In Oracle 12.1.0.2 output is:
SQL> ORADEBUG DOC EVENT NAME Events in library DIAG: ------------------------------ trace[] Main event to control UTS tracing disable_dde_action[] Event used by DDE to disable actions ams_trace[] Event to dump ams performance trace records ams_rowsrc_trace[] Event to dump ams row source tracing sweep_verification Event to enable sweep file verification enable_xml_inc_staging Event to enable xml incident staging format dbg[] Event to hook dbgtDbg logging statements Events in library RDBMS: ------------------------------ wait_event[] event to control wait event post-wakeup actions alert_text event for textual alerts trace_recursive event to force tracing recursive SQL statements clientid_overwrite event to overwrite client_identifier when client_info is set sql_monitor event to force monitoring SQL statements sql_monitor_test event to test SQL monitoring eventsync_tac Event posted from events syncing tac sql_trace event for sql trace pmon_startup startup of pmon process background_startup startup of background processes db_open_begin start of db open operation test_gvtf test GV$() Table Tunction fault Event used to inject fault in RDBMS kernel gcr_systest gcr_systest em_express EM Express debug event emx_control event to control em express emx_test_control event to control em express testing awrdiag[] AWR Diagnostic Event msgq_trace event to control msgq tracing ipclw_trace event to control ipclw tracing kbc_fault event to control container fault injection asm_corruption_trace event to control ASM corruption tracing kxdrs_sim debug event to simulate certain conditions in kxdrs layer kcfio_debug debug event to debug kcfio based on event level krbabrstat_fault event to control krbabrstat fault injection periodic_dump[] event for periodically dumping Events in library GENERIC: ------------------------------ kg_event[] Support old error number events (use err# for short) Events in library CLIENT: ------------------------------ oci_trace event for oci trace Events in library LIBCELL: ------------------------------ libcell_stat libcell statistics level specification cellclnt_skgxp_trc_ops Controls to trace SKGXP operations cellclnt_ossnet_trc Controls to trace IP affinity in ossnet cellclnt_high_lat_ops Control to trace High-latency I/O operations diskmon_sim_ops[] Diskmon simulation events cellclnt_read_outlier_limit Control to trace read I/O outliers cellclnt_write_outlier_limit Control to trace write I/O outliers cellclnt_lgwrite_outlier_limit Control to trace log write I/O outliers cellclnt_sparse_mode Mode of how to handle sparse buffers Events in library ADVCMP: ------------------------------ arch_comp_level[] arch_comp_level[] ccmp_debug columnar compression debug event inmemory_nobasic disable KDZCF_IMC_BASIC implementation inmemory_nohybrid disable KDZCF_IMC_HYBRID implementation ccmp_align columnar compression enable alignment ccmp_countstar columnar compression enable count(*) optimization ccmp_dumpunaligned columnar compression dump dbas of unaligned CUs ccmp_rbtree columnar compression switch back to rb tree inmemory_force_ccl inmemory force column compression levels inmemory_imcu[] inmemory_imcu[ ] Events in library PLSQL: ------------------------------ plsql_event[] Support PL/SQL error number events