I'm using a Google Cloud SQL instance for a project on Google App Engine. I have enabled the slow query log flag to store slow queries. But the slow_log table's performance is really bad, just for selecting some data took about 6 minutes.
I have also noted that the logged queries are not really "slow", i mean they have 0 as query time and lock time. See example:
mysql> SELECT * FROM slow_log LIMIT 900000,1;
start_time: 2015-05-01 20:06:16
query_time: 00:00:00
lock_time: 00:00:00
rows_sent: 1
rows_examined: 1
sql_text: select * fromserviceswherename= 'facebook' limit 1
1 row in set (6 min 23.37 sec)
Should I add some indexes to the table? or should I truncate it to decrease the number of rows?
