Detailed setting of Xtradb cluster

Hello everybody, I have a question about detailed setting of Xtradb cluster, parameters such as’’ ndb_cluster_connection_pool “” key_buffer_size " and other important parameters. There are 4 servers with cpu 23-cores, 12gb RAM DDR3
Please, suggest where can I read some detailed information about it.

Hi, Percona XtraDB Cluster(PXC) internally uses Galera cluster ( so you can use all Galera parameters to configure your cluster. Here, is the detailed information about those parameters. 0.8

Some are mentioned here too. on.html#initial-configuration

Thank you!