The following formula is used to determine the size of a user LOB RDAREA.
Formula
Size of user LOB RDAREA (bytes) ={ a [ Si6400096 + 7 + 3(a - 1)]1 i=1 b + [ (Cj + 1024) 8192]2 j=1 }381924
a: Number of HiRDB files that constitute the user LOB RDAREA
b: Total number of rows in LOB columns
Count rows with a data length of 0, but do not count rows with the NULL value.
Si: Number of segments for each HiRDB file specified with the create rdarea statement of the database initialization utility (pdinit) or database structure modification utility (pdmod)
Cj: Length of each BLOB data (bytes)
1 Total number of pages in the directory pages part.