Query regarding Product Data Migration and Cache

Hello Experts,

Could you please help me with the below query:

Customer has migrated Product and Pricelist data through xml from one environment to another environment. Sometimes it shows old price under Sales Order-Line Items. This Behaviour continues untill the OM is bounced or some time works with doing a clear cache multiple times.

1. When doing Refresh Product Cache under Administration - Product -> Product Definitions and Administration - Pricing -> Pricelist -Clear Cache, Which is the cache that gets cleared. Is it the object manager cache that gets cleared or where is it located. When doing LOV clear cache, Which is the cache that gets cleared. Is it the object manager cache that gets cleared or where is it located.