The IDXDATBUF option determines the size of buffer used when accessing the data portion of a file with organization INDEXED. 
Syntax:
 
IXDATBUF
=
 { 
integer
 } 
 { 
0
 } 
 
 
Parameters:
- 
integer
 
- Round up the value that you enter to the next power of 2 that is greater or equal.
 
- 0
 
- Do not use buffering.
 
 
 
Comments:
A non-zero value can be beneficial while the file is being created. Otherwise, you might not achieve a gain in performance; in fact, performance can be degraded.
For those files where index and data are held in the same physical file, this option has no effect.