MySQL Forums
Forum List  »  Performance

Re: why MySql 8.0.17 Select query performance is slower than Mysql 5.7.26?
Posted by: Sudarshan m
Date: February 03, 2020 04:54AM

+----+-------------+---------------+------------+------+---------------+------
Explain
+---------+------+-----------+----------+-------+
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
+----+-------------+---------------+------------+------+---------------+------+---------+------+-----------+----------+-------+
| 1 | SIMPLE | Some_Table | NULL | ALL | NULL | NULL | NULL | NULL | 118544457 | 100.00 | NULL |
+----+-------------+---------------+------------+------+---------------+------+---------+------+-----------+----------+-------+



mysql> SHOW CREATE TABLE Some_Table;
+---------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table | Create Table |
+---------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Some_Table | CREATE TABLE `Some_Table` (
`variableid` bigint(20) NOT NULL,
`name` char(8) CHARACTER SET ascii NOT NULL,
`value` varchar(1024) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
PRIMARY KEY (`variableid`,`name`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 |

Options: ReplyQuote


Subject
Views
Written By
Posted
Re: why MySql 8.0.17 Select query performance is slower than Mysql 5.7.26?
581
February 03, 2020 04:54AM


Sorry, you can't reply to this topic. It has been closed.

Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party.