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&quot;how do I know which ones are important to me.&quot;<br />
- the critical patch contains security fixes to secure your database from the security risks and vulnerability exploit. I would say all critical patches are important. 
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"how do I know which ones are important to me."
- the critical patch contains security fixes to secure your database from the security risks and vulnerability exploit. I would say all critical patches are important.

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To add my personal opinion to what has already been posted.<br />
<br />
Oracle is famous for introducing new bugs in patches. &nbsp;From time to time they also sneak in a LOT of new features into a 'patch' that I feel should probably be a major release. &nbsp;For example, they have rewritten most of the XML code in some patchsets.<br />
<br />
Review the bugs and security holes fixed in the patch you are thinking about applying. &nbsp;If they really don't apply to your system, I would probably not apply the patch.<br />
<br />
Subscribe to the adage: &nbsp;If it's not broke, don't fix it.<br />

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To add my personal opinion to what has already been posted.

Oracle is famous for introducing new bugs in patches.  From time to time they also sneak in a LOT of new features into a 'patch' that I feel should probably be a major release.  For example, they have rewritten most of the XML code in some patchsets.

Review the bugs and security holes fixed in the patch you are thinking about applying.  If they really don't apply to your system, I would probably not apply the patch.

Subscribe to the adage:  If it's not broke, don't fix it.


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Sorry for delay - Lookin into this shortly.
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Sorry for delay - Lookin into this shortly.

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I have now inhereted out oracle server maintanace.<br />
I can see there has been a April 2011 Critical Patch.<br />
<br />
What is best practice for applying this patch and how do I know which ones are important to me.<br />
Does each new patch contain the old patch info?
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I have now inhereted out oracle server maintanace.
I can see there has been a April 2011 Critical Patch.

What is best practice for applying this patch and how do I know which ones are important to me.
Does each new patch contain the old patch info?

Oracle Critical Patch Question

The term "Backup" means the methods and processes involved to copy computer data (system data as well as application data) to media other than the ones where the data originally live (disk, tape, optical, cloud). "Restore" in turn means the methods and processes involved in data recovery, i. e., bringing back copied computer data to their original location. Backup/Restore primarily serves as a means of protection against data loss, be it due to disaster, corruption or sabotage. It can also be used for recovering data from an earlier point in time and even for cloning machines or applications. There is a wide variety of backup/restore software available, from expensive commercial products to free or open source tools.

Storage Software

Oracle is an object-relational database management system. It supports a large number of languages and application development frameworks. Its primary languages are SQL, PL/SQL and Java, but it also includes support for C and C++. Oracle also has its own enterprise modules and application server software.