No, it is not retrospective. 
You are setting parameters to be used when the next extent is created.
A better example is when setting next extent size to be different than the
existing  extent size (dictionary managed tablespaces only).
It does not alter all the existing extents it only works on the next one
that is  created.

HTH

John

-----Original Message-----
Sent: 24 September 2002 10:58
To: Multiple recipients of list ORACLE-L



Is the effect of modifying PCTFREE/PCTUSED immediate ?


If I do an "ALTER TABLE <tablename> PCTFREE 99 PCTUSED1", 
does this take effect immediately, even for existing blocks. 
[If so, existing blocks would not get new rows inserted]. 
Or is it effective only in new Extents ? In that case, 
existing blocks in existing Extents still use the old 
PCTFREE/PCTUSED parameters and keep re-entering the 
FreeList. 
 
Hemant K Chitale
http://hkchital.tripod.com
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