Hi, Everyone,
When I was testing moving BLOBs from BasicFile to SecureFile, I found out
currently the BLOBs were stored out of line (DISABLE STORAGE IN ROW). It
seems to take up large space.
"SELECT SUM(BYTES) FROM DBA_extents WHERE SEGMENT_NAME ='<BLOB NAME>' "
returns 353GB.
"select sum(dbms_lob.getlength('<BLOB COLUMN NAME>')) from <TABLE NAME>"
returns less than 2G!!!
Now the people who designed these tables are long gone, I really don't have
anyone to turn to ask for the thoughts behind the storage choice. I am
considering using dbms_redefinition to convert the BLOBs to SecureFile, as
well as enable storage in row.
Do you see any reason that I might regret the conversion to inline storage
someday?
Thank you,
Chen
