What script to execute for creating x$kcbcbh and x$kcbrbh in oracle 7.3.4

Could any one reply me asap the script name to create the buffer cache stat view x$kcbcbh and x$kcbrbh.Its urgent

normally they are created under the SYS account, nevertheless read the following :

[...] Enabling the X$KCBCBH Table
The collection of statistics in the X$KCBCBH table is controlled by the initialization parameter DB_BLOCK_LRU_STATISTICS. The value of this parameter determines whether Oracle collects the statistics. The default value for this parameter is FALSE, which means that the default behavior is not to collect statistics.

To enable the collection of statistics in the X$KCBCBH table, set the value of DB_BLOCK_LRU_STATISTICS to TRUE. [...]

Thanks a lot .I got it.