Hi listers,

continuing on varchar2 memory cost  in  PL/SQL,
note this found in Oracle 8i/9i PL/SQL user guide :
(Chapter 3 PL/SQL Datatypes - Character types - Varchar2)

"Small VARCHAR2 variables are optimized for performance, 
and larger ones are optimized for efficient memory use. 
The cutoff point is 2000 bytes. For a VARCHAR2 that is 2000 bytes
 or longer, PL/SQL dynamically allocates only enough memory 
to hold the actual value. For a VARCHAR2 variable that is
shorter than 2000 bytes, PL/SQL preallocates the full declared length
 of the variable. For example,
if you assign the same 500-byte value to a VARCHAR2(2000 BYTE)
 variable and to a VARCHAR2(1999 BYTE) variable, the former 
takes up 500 bytes and the latter takes up 1999 bytes. "

HTH

Regards



Gilles Parc

carpe diem !!
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