Question

My rails app is set up using a mysql database.

When I do a simple find eg:

Pin.find(:all).size

will result in the following

Pin Load (130.1ms)  SELECT `pins`.* FROM `pins` 
  EXPLAIN (0.6ms)  EXPLAIN SELECT `pins`.* FROM `pins` 
EXPLAIN for: SELECT `pins`.* FROM `pins` 
+----+-------------+-------+------+---------------+------+---------+------+-------+-------+
| id | select_type | table | type | possible_keys | key  | key_len | ref  | rows  | Extra |
+----+-------------+-------+------+---------------+------+---------+------+-------+-------+
|  1 | SIMPLE      | pins  | ALL  | NULL          | NULL | NULL    | NULL | 33385 |       |
+----+-------------+-------+------+---------------+------+---------+------+-------+-------+
1 row in set (0.00 sec)

 => 33385 

How do I turn off the EXPLAIN SELECT so that:

 Pin.find(:all).size

will return

Pin Load (1719.6ms)  SELECT `pins`.* FROM `pins` 
 => 43774 

Answer 1

In environments/development set

config.active_record.auto_explain_threshold_in_seconds = nil

and this will turn auto explain off.