oracle11g数据库版本号,Oracle数据库之关于oracle db 11gR2版本号上的參数和scn headroom补丁问题...
本文主要向大家介紹了Oracle數據庫之關于oracle db 11gR2版本號上的參數和scn headroom補丁問題,通過具體的內容向大家展現,希望對大家學習Oracle數據庫有所幫助。
關于oracle?db?11gR2版本號上的_external_scn_rejection_threshold_hours參數和scn?headroom補丁問題
來自于:
Installing,?Executing?and?Interpreting?output?from?the?"scnhealthcheck.sql"?script?(文檔?ID?1393363.1)
第一點:
In?addition?to?the?above?result?the?script?output?may?advise?to?set?the?hidden?parameter?"_external_scn_rejection_threshold_hours"?on?some?Oracle?versions.?The?following?text?gives?more?information?about?setting?this?parameter:
Set?_external_scn_rejection_threshold_hours=24?after?apply
Oracle?recommends?setting?this?parameter?to?the?value?24?in?10g?and?11.1?releases?-?it?does?not?need?to?be?set?in?11.2?or?later?releases.?The?parameter?is?static?and?so?must?be?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?;
從以上能夠看出,在?11.2及其更高的版本號上,是無需設置_external_scn_rejection_threshold_hours參數的。
實際上。在11.2.0.4的db軟件中,該參數已經出如今隱含參數中了。
第二點:
Please?note?that?there?are?no?SCN?hardening?fixes?for?the?following?versions.?The?recommendation?for?these?versions?is?to?upgrade?to?a?newer?release:
All?versions?up?to?and?including?9.2.0.7
Versions?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從這句話能夠看出:以上版本號的oracle數據庫軟件沒有修復scn?headroom?的補丁。請升級到更新的版本號。這一招夠狠的。
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?be?used?on?those?releases?to?check?the?current?headroom.
從這句話能夠看出,在11.2.0.4及其12.1.0.1版本號上,已經包含了對scn問題的修復(fixes),說白了。11.2.0.4及其12.1.0.1的程序版本號已經修復了scn?headroom問題。
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