MySQL database key monitoring indicators

MySQL database key monitoring indicators 
    QPS 
        queries per second, the number of queries per seconds 
        Show, Ltd. Free Join Status like 'Question%'; 
        Queries / seconds The 

    TPS 
        tranaction per seconds The number of transactions per second 
        TPS = (Com_commit + Com_rollback) / seconds The 

        Show, Ltd. Free Join Status like 'Com_commit '; 
        Show like Global Status' Com_rollback'; 

    thread connections 
        Show like Global Status' Max_used_connectons'; 
        Show like Global Status' threads% '; 

    the maximum number of connections 
        show variable like' max_connections';

    Query Cache (Cache Query) 
        query cache for caching query results select 
        the next time the same query request is received, perform the actual query processing not directly return the result 
        applied to a large number of queries, rarely change data in the table 

        to modify my.cnf
        Query_cache_size to the specific size, the specific size is the actual number depends on the query, but is preferably set to a multiple of 1024, 
    the reference value 32M. 

        Add the line: query_cache_type = 0/1/2 
        If set to 1, all results will be cached, unless you use the select statement SQL_NO_CACHE query cache is disabled 
        if set to 2, only the cache by SQL_CACHE specified in the select statement needs to be cached query 

    query Cache command rate 
        Show status like 'Qcache'; 
        Query_cache_hits = (Query_hits / (the Qcache_hits Qcache_inserts +)) * 100% 

    locked state 
        Show Global status like '%% lock'; 
        Table_locks_waited / Table_locks_immediate lock table represents larger values result the more serious obstruction 
        Innodb_row_lock_waits innodb row lock, the lock gap is too large may be caused by the 

    master-slave delay 
        inquiry from the master delay time: show slave status