I noticed that in the latest release of Percona XtraDB Cluster (PXC), the behavior of wsrep_RSU_method changed somewhat. Prior to this release, the variable was GLOBAL only, meaning to use it you would:
mysql> set GLOBAL wsrep_RSU_method='RSU';
mysql> ALTER TABLE ...
mysql> set GLOBAL wsrep_RSU_method='TOI';
This had the (possibly negative) side-effect that ALL DDL’s issued on this node would be affected by the setting while in […]