Datasource performance

Hi,

Reg: datasource performance could any one please let me know how to do it?

DS: 0ICH_TS_INT_1 which runs for almost 2hrs with records of  only ~ 60000 and some other standard DS with same data volume it takes only 40mins like that.

When the infopackage runs in the BI Production system and corresponding background job will be triggered in source system where source is SNC system.

When i see the job logs in sm37 of SNC system there are many SQL operation TRUNCATE table is happening this table all are temporary SID tables

And its going for the customer exit.

Moreover this IP is a full update daily and we cant make it to delta coz its daily an snapshot business data.

Thanks,

Siva