The popular open source database MySQL runs out of the box very good on PowerPC.|
The performance of MySQL on PowerPC is good and PowerPC servers as for example Genesis products give solid database servers.
The MySQL server was developed with the intention to run on every hardware type. But MySQL only comes with mentionable performance optimizations for x86 CPUs. MySQL was not aware of the features of the PowerPC CPUs and did not use their full potential.
With the help of Genesi and Freescale I profiled the MySQL server and proposed a number of performance increasing patches for the Power and PowerPC CPU family.