Database users are complaining that the database is slow.I observed that The select queries are taking time when they are issued by users and most of the queries are spending time in reading index blocks.Also observed "db file sequenial read" as one the top events in awr report.
Almost every query is using the indexes in their execution plan.
All the datafiles are located on the same Drive on windows 2003 R2 server.
Attached the AWR report for 30 min duration.
please suggest options for me to improve the performance.