RP/0/RP0/CPU0:R4#show ospf trace spf | include Begin SPF
Tue Sep 22 11:37:26.309 UTC
22   Sep 22 11:20:38.308  ospf_run_spf: Begin SPF
57   Sep 22 11:20:47.895  ospf_run_spf: Begin SPF
89   Sep 22 11:20:52.095  ospf_run_spf: Begin SPF
125  Sep 22 11:21:00.146  ospf_run_spf: Begin SPF
158  Sep 22 11:21:00.347  ospf_run_spf: Begin SPF
189  Sep 22 11:21:01.718  ospf_run_spf: Begin SPF
218  Sep 22 11:21:02.118  ospf_run_spf: Begin SPF
249  Sep 22 11:23:26.833  ospf_run_spf: Begin SPF
276  Sep 22 11:23:26.843  ospf_run_spf: Begin SPF
304  Sep 22 11:23:26.883  ospf_run_spf: Begin SPF
333  Sep 22 11:23:26.893  ospf_run_spf: Begin SPF
362  Sep 22 11:23:27.084  ospf_run_spf: Begin SPF
397  Sep 22 11:23:27.094  ospf_run_spf: Begin SPF
435  Sep 22 11:23:27.509  ospf_run_spf: Begin SPF
465  Sep 22 11:23:27.515  ospf_run_spf: Begin SPF
495  Sep 22 11:30:55.112  ospf_run_spf: Begin SPF
520  Sep 22 11:30:55.162  ospf_run_spf: Begin SPF
555  Sep 22 11:30:55.216  ospf_run_spf: Begin SPF
581  Sep 22 11:31:01.990  ospf_run_spf: Begin SPF
606  Sep 22 11:31:02.040  ospf_run_spf: Begin SPF
641  Sep 22 11:31:02.079  ospf_run_spf: Begin SPF
RP/0/RP0/CPU0:R4#show ospf trace errors
Tue Sep 22 11:37:27.146 UTC

Traces for OSPF 1 (Tue Sep 22 11:37:27)
Traces returned/requested/available:  3/8192/3
Trace buffer: errors

1    Sep 22 11:20:37.898  ospf_nsr_ev_free: Cannot free event 0x254d8fc0: flags 0x0,work 0x55cc0e425fd0, handler 0x55cbfe32102e
2    Sep 22 11:20:37.898  ospf_nsr_ev_free:   inst 0x0, nsr_info 0x0, next 0x0
3    Sep 22 11:20:37.912  ospf_is_config_startup_done: Reading config startup done tuple failed [errno 0x40818600: 'sysdb' detected the 'warning' condition 'A SysDB client tried to access a nonexistent item or list an empty directory']