Hi Ramesh,
1. Check the EWA report and take the necessary actions related to performance.
DB2 Version 10.1 for Linux, UNIX, and Windows
Insert Time Clustering (ITC) Tables
ITC tables group their records based on the insert time. Space reclamation that is, returning free space in the table back to the tablespace, is possible without a full offline or online REORG.
Index Space Reclaim
For index objects, a new function is available that reclaims free space and returns it to the table space in online mode
Adaptive Compression
In addition to the existing row compression method, adaptive compression works on page level and provides improved table data compression without the need for table reorganization.
Index Skip Scan
Composite indexes can be used during query execution even if the query does not define constraints for all index columns.
Performance Improvements
New functions have been designed for DB2 10.1 to improve performance, for example, smarter index prefetching, hash join improvements, zigzag joins, and early aggregation.
Support of Hidden Columns
During table definition, columns can be marked as implicitly hidden. Such columns are unavailable until they are explicitly referenced.
Storage Groups
The existing automatic storage infrastructure has been extended by a new object, the storage group. Storage groups contain multiple storage paths that you can define and to which you can assign tables paces. This allows for the separation of cold, warm, and hot data that can subsequently be placed on different storage media.
Multi-Core Parallelism
The use of multi-core systems in SMP architecture improves data warehouse environments.
HADR with Multiple Standbys
The HADR feature allows the use of more than one standby server.
Log File Compression
Archived log files are now automatically compressed, which leads to further disk space savings.
Thanks & Regards,
Balaram Mukku
