Business Object Search in ERP 6.0 systems is based on the SAP NetWeaver Search Engine Service (SES). SES provides a search and indexing framework that enables users to search for business objects (structured data) using the search engine technology of Search and Classification (TREX), including full text search and fuzzy search. There is a large number of SAP Applications that use SES to offer a search for structured data. Currently more than 50 business object types have implemented the SES methods.
A few days ago SAP Note 1345777 has been published that answers frequently asked questions about the usage of SES. The document covers administrative aspects such as backup and recovery and high availability as well as performance related topics helping you to improve the overall performance of an SES installation
The SES options are restricted to indexing and searching within a single SAP system (one system ID (SID)). To extend the range of your search, use SAP NetWeaver Enterprise Search. SAP ERP 6.0 systems can be integrated into SAP NetWeaver Enterprise Search as search service providers. These are systems and services that return search results to Enterprise Search using their own search technology.
As a result any optimization described in the SAP Note 1345777 for SES based search scenarios can be leveraged by SAP NetWeaver Enterprise as well.