BCS Incremental crawl running longer than full crawl in SharePoint 2016

Question

We have configured BCS search in SharePoint 2016. Created External content type with Sharepoint Designer and created Content Source using with External content type.(Source in Documentum). While run Full crawl, completed less than 3 hours and got errors. Again we ran Incremental crawl, errors were disappeared, but incremental crawl is running forever until We stopped incremental crawl.

Please help us to resolve this issue

Thanks in Advance

Answer 1

You have to create supply the LastModifiedTimeStampField property on the Finder Method Instance and point it at the property of you External Content Type's last modified timestamp field. This will be used for incremental crawling.

<Property Name="LastModifiedTimeStampField" Type="System.String">LastModified</Property>

More Info Developing for BCS