Database and GPGPU

GPGPU as a lot of potentiality on many tasks (not all), especially handling matrices like in a database, at least according all the PR surrounding the subject.

Still I haven't found a database that use GPGPU to speed up performance.

Do you know any open source database that exploit GPGPU? Wh开发者_JAVA百科y GPGPU is so slow to take a hold in markets where it would be such a major improvement?

Here is some research that has been done in that field. That being said, the limiting factor in many database setups is disk speed. Most databases are so huge they must be stored on disks (unless you are Google or Facebook and can afford terabytes of RAM). This limits the speed at which results can be returned because most of the time is spent seeking on the hard drive, instead of doing computations on the CPU.