Loading performance issues

Question

HI gurus
please can u help in loading issues.i am extracting  data from standard extractor  in purchasing  for 3 lakhs record it is taking  18 hrs..can u please  suuguest  me loading performance issues .
-KP

Answer 1

Hi,
Loading Performance:
a) Always load and activate the master data before you load the transaction data so that the SIDs don't have to be created at the loading of the transaction data.
b) Have the optimum packet size. If you have too small a packet size, the system writes messages to the monitor and those entries keep increasing over time and cause slow down. Try different packet sizes to arrive at the optimum number.
c) Fine tune your data model. Make use of the line item dimension where possible.
d) Make use of the load parallelization as much as you can.
e) Check your CMOD code. If you have direct reads, change them to read all the data into internal table first and then do a binary search.
f) Check code in your start routine, transfer rules and update rules. If you have BW Statistics cubes turned on, you can find out where most of the CPU time is spent and concentrate on that area first.
g) Work with the basis folks and make sure the database parameters are optimized. If you search on OSS based on the database you are using, it provides recommendations.
h) Set up your loads processes appropriately. Don't load all the data all the time unless you have to. (e.g) If your functionals say the historical fiscal years are not changed, then load only current FY and onwards.
i) Set up your jobs to run when there is not much activity. If the system resources are already strained, your processes will have to wait for resources.
j) For the initial loads only, always buffer the number ranges for SIDs and DIM ids
Hareesh