Delta Indexing for product analytics

Hi,

Can anyone help me with enabling delta indexing for Windchill Product Analytics?

For delta indexing, in com.ptc.insight.rdr.search.solr.provider.config.properties I have put a cron expression for Supplier Part to run every minute.

This is what it looks like :

com.ptc.insight.solr.supplierpart.delta.index.service.batch.size=3000
com.ptc.insight.solr.supplierpart.delta.index.service.cron.expression=0 * * ? * *

After restarting the virgo - server, I am able to see the change in Scheduled Jobs in the UI.

However, modifications to a Supplier Part are not reflected until I go for manual full indexing.

Can someone please help? Any suggestions would be appreciated.

Regards.