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question regarding automatic undo

question regarding automatic undo

2005-06-21       - By Goulet, Dick

Reply:     1     2     3     4     5     6  

Yes.  When you enable automatic undo management you leave all of that to
the database engine.

 __ __  

From: oracle-l-bounce@(protected)
[mailto:oracle-l-bounce@(protected)] On Behalf Of Jeffrey Beckstrom
Sent: Tuesday, June 21, 2005 12:41 PM
To: oracle-l@(protected); oracle-db-l@(protected);
ORACLE-L@(protected); oracledba@(protected);
oracle-rdbms@(protected)
Subject: question regarding automatic undo


Two identical databases.

database 1 has 10 undo online and 2 offline
database 2 has 10 undo online and 23 offline

Why does the second have more offline undo segments.  Does Oracle
automatically create them if needed and when no longer needed offline
it??



Jeffrey Beckstrom
Database Administrator
Greater Cleveland Regional Transit Authority
1240 W. 6th Street
Cleveland, Ohio 44113

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<DIV dir=ltr align=left><SPAN class=441555316-21062005>Yes.&nbsp; When you
enable automatic undo management you leave all of that to the database
engine.</SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<B>From:</B> oracle-l-bounce@(protected)
[mailto:oracle-l-bounce@(protected)] <B>On Behalf Of </B>Jeffrey
Beckstrom<BR><B>Sent:</B> Tuesday, June 21, 2005 12:41 PM<BR><B>To:</B>
oracle-l@(protected); oracle-db-l@(protected);
ORACLE-L@(protected); oracledba@(protected);
oracle-rdbms@(protected)<BR><B>Subject:</B> question regarding automatic
undo<BR><BR></DIV>
<DIV></DIV>
<DIV>Two identical databases.</DIV>
<DIV>&nbsp;</DIV>
<DIV>database 1 has 10 undo online and 2 offline</DIV>
<DIV>database 2 has 10 undo online and 23 offline</DIV>
<DIV>&nbsp;</DIV>
<DIV>Why does the second have more offline undo segments.&nbsp; Does Oracle
automatically create them if needed and when no longer needed offline it??</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV>Jeffrey Beckstrom<BR>Database Administrator<BR>Greater Cleveland Regional
Transit Authority<BR>1240 W. 6th Street<BR>Cleveland, Ohio
44113</DIV></BODY></HTML>