Guys, i'm with time and was looking an old patch about query cache information schema https://mariadb.atlassian.net/browse/MDEV-4682 it add an statistic about query cache hits my doubt is... i was trying to understand how could i create tests, since the result of statistic isn't deterministic how should i execute a test case like this? columns that i have doubt: columns ... QUERY_ROWS <- deterministic SELECT_ROWS_READ <- deterministic QUERY_HITS <- deterministic QUERY_HITS_PERIOD_LOW <- non deterministic QUERY_HITS_PERIOD_HIGH <- non deterministic QUERY_HITS_PERIOD_OUTLIERS <- non deterministic QUERY_HITS_TOTAL_TIME_US <- non deterministic QUERY_HITS_MEAN_PERIOD_US <- non deterministic QUERY_HITS_MEAN_PERIOD_LOW_US <- non deterministic QUERY_HITS_MEAN_PERIOD_HIGH_US <- non deterministic QUERY_INSERT_TIME <- probably deterministic (or not?) QUERY_LAST_HIT_TIME <- probably deterministic (or not?) SELECT_EXPEND_TIME_US <- non deterministic SELECT_LOCK_TIME_US <- non deterministic ... -- Roberto Spadim