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X-Comment: Oracle RDBMS Community Forum
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From: A Joshi <ajoshi977@yahoo.com>
Subject: Re: ** can two processes use the same rollback extent 
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<DIV>Hi,</DIV>
<DIV>&nbsp; A simple rollback segment question. If I do not set a optimal then&nbsp;can I assume following </DIV>
<DIV>&nbsp;</DIV>
<DIV>1)&nbsp;&nbsp;rollback segment will not shrink. </DIV>
<DIV>2)&nbsp;It will keep growing till tablespace fills up. </DIV>
<DIV>3)&nbsp;And there will be no 'snapshot too old' errors?</DIV>
<DIV>&nbsp;</DIV>
<DIV>Thanks<BR><BR><B><I>A Joshi &lt;ajoshi977@yahoo.com&gt;</I></B> wrote:</DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">
<DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">
<P>Hi,</P>
<P>&nbsp;&nbsp;&nbsp; One rollback segment can be used by multiple transactions/processes but what about the extents? Is it safe to assume that only one transaction/process can use one extent? What is a good way to size the extent for warehousing tasks? Or guess the rollback generated and size needed. </P>
<P>Thank You</P>
<P>&nbsp;</P></BLOCKQUOTE></DIV>
<P>
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