1 files changed, 59 insertions, 0 deletions
diff --git a/mysql-test/suite/perfschema/t/query_cache.test b/mysql-test/suite/perfschema/t/query_cache.test
new file mode 100644
index 00000000..d5e3008d
--- /dev/null
+++ b/mysql-test/suite/perfschema/t/query_cache.test
@@ -0,0 +1,59 @@
+# 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
+
+set @save_query_cache_size=@@query_cache_size;
+
+--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 global status like "Qcache_queries_in_cache";
+show global status like "Qcache_inserts";
+show global status like "Qcache_hits";
+
+select * from t1;
+
+show global status like "Qcache_queries_in_cache";
+show global status like "Qcache_inserts";
+show global status like "Qcache_hits";
+
+select spins from performance_schema.events_waits_current order by event_name limit 1;
+
+--replace_result CYCLE {CYCLE_OR_NANOSECOND} NANOSECOND {CYCLE_OR_NANOSECOND}
+select * from performance_schema.setup_timers where name='wait';
+
+show global status like "Qcache_queries_in_cache";
+show global status like "Qcache_inserts";
+show global status like "Qcache_hits";
+
+select spins from performance_schema.events_waits_current order by event_name limit 1;
+
+--replace_result CYCLE {CYCLE_OR_NANOSECOND} NANOSECOND {CYCLE_OR_NANOSECOND}
+select * from performance_schema.setup_timers where name='wait';
+
+show global status like "Qcache_queries_in_cache";
+show global status like "Qcache_inserts";
+show global status like "Qcache_hits";
+
+SET GLOBAL query_cache_size=@save_query_cache_size;
+
+drop table t1;
+flush status;
+