Buffer Tuning

hi,

Please i need your help, i want to know wich values can i enter in the buffers files for :

• SIZE_DATA_BUFFERS.
• SIZE_DATA_BUFFERS_DISK.
• NUMBER_DATA_BUFFERS
• NUMBER_DATA_BUFFERS_DISK.
• NUMBER_DATA_BUFFERS_NDMP.
• NUMBER_DATA_BUFFERS_RESTORE.

My media server is a windows 2008 server R2, with 64 GB of physical memory.

thanks in advance.