SET @default_max_alloc = @@global.ndb_eventbuffer_max_alloc;
SET @default_free_percent = @@global.ndb_eventbuffer_free_percent;
set global ndb_eventbuffer_max_alloc=1048576;
set global ndb_eventbuffer_free_percent=35;
SELECT @@global.ndb_eventbuffer_free_percent;
@@global.ndb_eventbuffer_free_percent
35
SELECT @@global.ndb_eventbuffer_max_alloc;
@@global.ndb_eventbuffer_max_alloc
1048576
set @@session.ndb_eventbuffer_free_percent=45;
ERROR HY000: Variable 'ndb_eventbuffer_free_percent' is a GLOBAL variable and should be set with SET GLOBAL
set global ndb_eventbuffer_max_alloc= @default_max_alloc;
set global ndb_eventbuffer_free_percent= @default_free_percent;