Shrink sharepoint database

A Sharepoint Database can become big and have unused spaces. To shrink database go to CA-> Health Analyzer:

http://takana:1337/Lists/HealthReports/AllItems.aspx

See if there is a list item about unused space in db under the Availability. Click on Repair Automatically in the opened Modal Dialog:  

• CA
• Database
• Db
• Monitoring
• Performance
• Sharepoint