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 (http://codership.com/products/mysql_galera) so you can use all Galera parameters to configure your cluster. Here, is the detailed information about those parameters.

http://www.codership.com/wiki/doku.php?id=galera_parameters_ 0.8

Some are mentioned here too.

http://www.percona.com/doc/percona-xtradb-cluster/installati on.html#initial-configuration

Thank you!