How To Reduce Query Execution Time

Hello,

I need to reduce load time for the query which create a grid. The grid have about 12,000 records, and increasing on daily basis, with pagination. It takes around 150-160 seconds i.e. approximately.

The data displays in grid is fetched from 3 tables with 2 joins. I already applied CDBCache but still it's taking so much time.

Please let me know if there is nay way in the Yii to reduce this load time.

Thanks in advance !!!