Update in table.

Hi masters.

I am a ABAP programmer and in ecc6.0 we use the oracle in SAP.

I have a question:

I have a program works in Job .

This program has update of datafield of table , i use the command modify.

But in some cases dont´t work and the data is not updated to table.

I think :its the time of response of database?

I use one :

CALL FUNCTION 'BAPI_TRANSACTION_COMMIT'

EXPORTING

wait = 'X'.

In this command it does even work.

But the performance is bad.

What i can do?

Thanks😊