查詢速度太慢，該如何優化？

Question

我有一個包含大量數據的數據庫，但查詢優化存在問題。 如何優化此查詢

explain SELECT distinct UNIX_TIMESTAMP(timestamp)*1000 as timestamp,count(ip_src) as counter from acid_event a,saher.network n where inet_aton(n.net)!=a.ip_src group by timestamp;
+----+-------------+-------+-------+---------------+-------------+---------   +------+---------+----------------------------------------------+
| id | select_type | table | type  | possible_keys | key         | key_len | ref  | rows    | Extra                                        |
+----+-------------+-------+-------+---------------+-------------+---------+------+---------+----------------------------------------------+
|  1 | SIMPLE      | n     | index | NULL          | fsi         | 27      | NULL | 2691027 | Using index; Using temporary; Using filesort |
|  1 | SIMPLE      | a     | index | NULL          | timestamp_2 | 13      | NULL | 6770718 | Using where; Using index; Using join buffer  |
+----+-------------+-------+-------+---------------+-------------+---------+------+---------+----------------------------------------------+

Answer 1

1. 嘗試擺脫INET_ATON() ，例如，將一個具有IP地址數值的新列添加到acid_event表中

2. 然后，如果結果集很大（例如成千上萬），則擺脫UNIX_TIMESTAMP(timestamp)*1000

3. 如果這還不夠，修復指標。 這是一本深入解釋索引的書 。