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HowTo: Remove parameters from the spfile

Sunday, February 12, 2012 Published by satya

Here's a question that comes up often:
  • How do you remove an SPFILE parameter (not change the value of, but actually purge it outright)?
Answer:
  • Use "ALTER SYSTEM RESET ..." (For database versions 9i and up)
Syntax:
  • ALTER SYSTEM RESET PARAMETER SID='SID|*'
  • ALTER SYSTEM RESET "_TRACE_FILES_PUBLIC" SCOPE=SPFILE SID='*';
NOTE: The "SID='SID|*'" argument is REQUIRED!

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