mariadb/mysql-test/suite/perfschema/t/query_cache.test

# Copyright (C) 2009 Sun Microsystems, Inc
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

# Tests for PERFORMANCE_SCHEMA

# This test verifies that performance schema tables, because they contain
# data that is volatile, are never cached in the query cache.

--source include/have_query_cache.inc
--source include/not_embedded.inc
--source include/have_perfschema.inc

--disable_warnings
drop table if exists t1;
--enable_warnings

create table t1 (a int not null);
insert into t1 values (1), (2), (3);

SET GLOBAL query_cache_size=1355776;

flush query cache;
reset query cache;
flush status;

select * from t1;

show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";

select * from t1;

show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";

select spins from performance_schema.EVENTS_WAITS_CURRENT order by event_name limit 1;

select name from performance_schema.SETUP_INSTRUMENTS order by name limit 1;

show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";

select spins from performance_schema.EVENTS_WAITS_CURRENT order by event_name limit 1;

select name from performance_schema.SETUP_INSTRUMENTS order by name limit 1;

show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";

SET GLOBAL query_cache_size= default;

drop table t1;
flush status;