About the _external_scn_rejection_threshold_hours and SCN headroom patch issues on the Oracle DB 11GR2 version number

About the _external_scn_rejection_threshold_hours and SCN headroom patch issues on the Oracle DB 11GR2 version number

From:
Installing, executing and interpreting output from the "Scnhealthcheck.sql" script (document ID 1393363.1)

1th:

In addition to the above result the script output could advise to set the hidden parameter "_external_scn_rejection_threshol D_hours "on some Oracle versions. The following text gives more information on setting this parameter:

Set _external_scn_rejection_threshold_hours=24 after apply
Oracle recommends setting this parameter to the value of 10g and 11.1 releases-it does not need to is set in 11.2 or Later releases. The parameter is a static and so must being set in the Init.ora or spfile used to start the instance.
eg
In Init.ora:
# Set threshold on Dd/mon/yyyy-see MOS Document 1393363.1
_external_scn_rejection_threshold_hours = 24

In the SPFile:
Alter system set "_external_scn_rejection_threshold_hours" = 24
Comment= ' Set threshold on Dd/mon/yyyy-see MOS Document 1393363.1 '
Scope=spfile;

As can be seen above, on the 11.2 and higher version number, there is no need to set _external_scn_rejection_threshold_hours parameters.

As a matter of fact. In 11.2.0.4 's DB software, the number of references is now implied.

2nd:

Please note that there is no SCN hardening fixes for the following versions. The recommendation for these versions are to upgrade to a newer release: all versions up to and  including 9.2.0.7  V Ersions 10.1.0.2 to 10.1.0.4 inclusive  Versions 10.2.0.1 and 10.2.0.2  version 11.1.0.6  version 11.2.0.1

From this sentence can be seen: the above version number of the Oracle database software does not repair the SCN headroom patch. Please upgrade to the version number of the update. This is a tough trick.

Versions 11.2.0.4 and 12.1.0.1 onwards already include the main SCN fixes but the "Scnhealthcheck" script described above Can still is used on those releases to check the current headroom.

It can be seen from this sentence that, in 11.2.0.4 and its 12.1.0.1 version number, there is already a fix to the SCN problem (fixes), plainly. The program version number of 11.2.0.4 and its 12.1.0.1 has fixed the SCN headroom issue.

About the _external_scn_rejection_threshold_hours and SCN headroom patch issues on the Oracle DB 11GR2 version number