DB too fast growth during the migration to AIX 12 c

Hi all

Please, help me understand why db growing so fast.

I have an older server (Win2003) table with 11g, which contains 400 000 000 rows and receives 79 GB tablespace

This table is sous-partitionnée and contains number and varchar2 datatypes (up to 50 bytes)

After copying the data to the new table (which places on AIX 12 DB) with the same structure (I used INSERT + DBLINK) size of the table takes 118 GB!

Please, help me to understand the reasons for this growth.

Parameters of NLS Win2003 11g:

AL32UTF8 NLS_CHARACTERSET

NLS_NCHAR_CHARACTERSET AL16UTF16

AIX 12 c NLS settings:

CL8MSWIN1251 NLS_CHARACTERSET

NLS_NCHAR_CHARACTERSET AL16UTF16

The reason is in default size of the measure. http://m.blog.ChinaUnix.net/uid-22948773-id-3873997.html

Tags: Database

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