1. Common view the configuration of the statement
- data storage directory database
Show Variables like ' dataDir ';
- whether to turn on slow query log
Show the Variables like ' % slow_query_log ';
- Slow query time
Show Variables like ' long_query_time ';
SET = 0 Global long_query_time
- slow query file storage methods and the default table file, using the actual project file
Show the Variables like ' log_output ';
2. How to use
1. Locate the path to store data
2. Locate the slow query log file
3. Log files related to interpretation
4. aids:
Summary In addition to query other identical SQL, and the order of the results according to parameters specified in the output analysis.
1.) mysqldumpslow -s r -t 10 slow-mysql.log
Interpretation parameters:
-s order (c, t, l , r, at, al, ar) Sort: c: Total number t: Total Time l: Lock Time r: total number of lines
-t top take several previously specified output as a result
2.) pt_query_digest