The dedicated process doesn’t call the timestamp function itself. It rather
reads the current value from an address location which is continuously updated
by the VKTM. This is probably an optimization, because the real time timestamp
function is expensive.
In my case, vktm hangs and it doesn’t update the location holding the current
Epoch time. The stale timestamp gets then copied in each transaction entry.
Since vktm hangs in nanosleep OS kernel call, it might be an OS issue:
pstack 14583
14583: ora_vktm_ATRM2
00007fff93c76eba nanosleep (7fffbfffc7d0, 7fffbfffc7e0)
00000000072f3e9a sltrusleep () + 6a
000000000758b994 kstmrmtickcntkeeper () + 5a4
000000000758b1f4 kstmmainvktm () + 194
00000000072f5869 ksbrdp () + 9a9
0000000006efc489 opirip () + 2b9
0000000006118950 opidrv () + 160
0000000006118767 sou2o () + 97
0000000006118534 opimai_real () + a4
000000000611808b ssthrdmain () + 26b
0000000006117df9 main () + a9
0000000007771e34 ???????? ()
Best regards,
Nenad
https://nenadnoveljic.com/blog
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