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| show full processlist;
SHOW ENGINE INNODB STATUS;
select * from mysql.user where user='root';
show status like '%CONNECT%';
show variables like 'max_connections'; show variables like 'max_user_connections'; show variables like 'max%';
show variables like 'wait_timeout'; show global variables like '%timeout%'; show variables like 'skip%';
show status like '%clients%'; show status like '%thread%'; show variables like '%partition%';
show plugins;
select user(); select current_user();
SET GLOBAL max_allowed_packet = 1024 * 1024 * 256;
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