Multiple EIM processes can be executed against an EIM table provided they all use different batches or batch ranges. The concern is that contention for locks on common objects may be experienced. To run multiple jobs in parallel against the same EIM table, check that the ‘FREELIST’ parameter is set appropriately for the tables and indexes used in the EIM processing. This would include the EIM tables and indexes as well as the base tables and indexes.

The value of this parameter specifies the number of block ids that will be stored in memory which are available for record insertion. As a rule of thumb, users should set this to at least half of the intended number of parallel jobs to be run against the same EIM table (example, a FREELIST setting of 10 should permit up to 20 parallel jobs against the same EIM table). This parameter is set at the time of object creation and the default for this parameter is 1. To check the value of this parameter for a particular object the following query can be used:

SELECT SEGMENT_NAME, SEGMENT_TYPE, FREELISTS
FROM DBA_SEGMENTS
WHERE SEGMENT_NAME=’’;

To change this parameter the object must be rebuilt. Again, be careful when rebuilding objects because of defaults, triggers, etc. on the objects. To rebuild the object follow the steps below:

1. Export the data from the table with the grants.
2. Drop the table.
3. Re-create the table with the desired FREELIST parameter.
4. Import the data back into the table
5. Rebuild the indexes with the desired FREELIST parameter.