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SHOW GLOBAL VARIABLES LIKE 'query_cache_type';
Variable_name Value
query_cache_type OFF
SET GLOBAL query_cache_type=ON;
ERROR HY000: Query cache is disabled; restart the server with query_cache_type=1 to enable it
SET GLOBAL query_cache_type=DEMAND;
ERROR HY000: Query cache is disabled; restart the server with query_cache_type=1 to enable it
SET GLOBAL query_cache_type=OFF;
ERROR HY000: Query cache is disabled; restart the server with query_cache_type=1 to enable it
SET GLOBAL query_cache_size=1024*1024;
SHOW GLOBAL VARIABLES LIKE 'query_cache_size';
Variable_name Value
query_cache_size 1048576
SET GLOBAL query_cache_size=0;