mysql> create index EzproxyAuthenticationEventAuthenticationEventorganisationName_indx on EzproxyAuthenticationEvent (organisationName);
ERROR 1059 (42000): Identifier name 'EzproxyAuthenticationEventAuthenticationEventorganisationName_indx' is too long
Also, what I'd done to break stuff:
:%s/EzproxyAuthenticationEvent/EzpAuthEvent/
... but on table names too so I'd not noticed that the old tables were still there (being used) without indexes.
Will advise whether tables with indexes perform any better.