Remove the old "dump" spfile settings after the upgrade to 11g?

We have recently upgraded to a development instance from 10g to 11g using dbua. During the upgrade, we have provided a value for diagnosis Destination (diagnostic_dest). However, when I do a "dump of parameter of the show', I see several obsolete parameters like background_dump_dest, user_dump_dest and core_dump_dest. Although filled with places, that we would expect (under "diag"), I had hoped dbua could get rid of these "old" settings I interpreter 'old' to mean "deprecrated."

1st quarter) I must take action? I've seen several workshops to upgrade - to-11g / slides / tip sheets that recommend the deletion of "old" settings But they never seem to give any details on those who, precisely, to remove. Although I found the syntax (alter system reset < parameter name > scope = spfile sid ='* ') I need additional information on specific settings I should remove.

Q2) when we went from 9i and 10 g some time ago, I think not that the decisions have been taken to remove settings from 'old', then either. If our current 11g pfile / spfile may have contained superfluous. So what is the best way to review and identify the parameters to delete? I have to do the following:

Select name, value, isdeprecated of the parameter $ v where isdeprecated = 'TRUE '.

... and start from there?

While it would be nice to have a 'clean' spfile, I didn't much care on superfluous, inert stuff that is not harmful. But I am concerned with settings that could cause unwanted and unexpected behavior or performance problems. Does someone can give a specific example (or examples) settings of 'old' by leaving in place where can cause side effects?

When upgrading you must first remove all parameters Oracle will not be present. These are usually identified in the documents of upgrade.

Second, you need to delete probably all parameters that are obsolete and if present ignored. The presence of ignored parameters looks like confusion somewhere down the line.

Third, if you implement all the new features via database settings, you probably want to remove database settings that apply to the features that your new choice obsolete as you would probably want to remove sga_target and pga_aggregate_target, if you set to 11 g memory_target.

HTH - Mark D Powell.

Tags: Database

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