MYSQL像导致丢失连接

Question

我运行此查询

SELECT 
    friends.*, users.username, users.profile, users_groups.id 
FROM 
    friends, users, users_groups 
WHERE 
    friends.uid=$logged_id AND friends.who=users.id 
    AND 
     (
      users.username LIKE '%$search%' OR 
      users.first_name LIKE '%$search%' OR 
      users.last_name LIKE '%$search%' 
     ) 
LIMIT 
    $start, $min 

但是我收到这样的：

Error Number: 2013 

Lost connection to MySQL server during query 

如果我从查询中删除LIKE语句它工作

Answer 1

也许是一张大桌子和LIKEs引起暂停。