大家都知道MariaDB是MySQL源代码的一个分支，但是他们两个之间有什么不能呢？本篇文章重点为大家分享一下MYSQL5.7与MariaDB10.3区别。
二者基础架构是一样的，默认变量参数数据也大同小异
mysql> SHOW VARIABLES LIKE 'max_con%';
+--------------------+-------+
| Variable_name | Value |
+--------------------+-------+
| max_connect_errors | 100 |
| max_connections | 151 |
+--------------------+-------+
2 rows in set (0.01 sec)
因为初始连接值太低，不适合高并发能力，所以提高到2000来做测试，这时候就有差异了
差异一，修改max_connetctions方式
Mysql
必须修改linux系统本身的ulimit参数 / 系统默认参数
[root@Centos7 ~]# ulimit -a | grep open
open files (-n) 1024
/修改limit参数
vim /etc/security/limits.conf
* soft nofile 65535
* hard nofile 65535
/ 修改MYsql配置文件
vim /etc/my.cnf
[mysqld]
max_connections=2000
systemctl restart mysqld
/ 查看变量，修改成功
mysql> SHOW VARIABLES LIKE 'max_con%';
+--------------------+-------+
| Variable_name | Value |
+--------------------+-------+
| max_connect_errors | 100 |
| max_connections | 2000 |
+--------------------+-------+
2 rows in set (0.03 sec)
MariaDB
直接修改参数重启即可 / 修改MYsql配置文件
vim /etc/my.cnf
[mysqld]
max_connections=2000
systemctl restart mysqld
/ 查看变量，修改成功
mysql> SHOW VARIABLES LIKE 'max_con%';
+--------------------+-------+
| Variable_name | Value |
+--------------------+-------+
| max_connect_errors | 100 |
| max_connections | 2000 |
+--------------------+-------+
2 rows in set (0.03 sec)
差异二，并发能力强度对比
测试环境
mysqlsap工具 同时并发1000个连接 分别并发1000个连接 同时并发1000个连接
/ mysql的并发
[root@Centos7 ~]# mysqlslap -a -c 1000
Benchmark
Average number of seconds to run all queries: 40.796 seconds
Minimum number of seconds to run all queries: 40.796 seconds
Maximum number of seconds to run all queries: 40.796 seconds
Number of clients running queries: 1000
Average number of queries per client: 0
/ MariaDB的并发
[root@Centos7 ~]# mysqlslap -a -c 1000
Benchmark
Average number of seconds to run all queries: 19.427 seconds
Minimum number of seconds to run all queries: 19.427 seconds
Maximum number of seconds to run all queries: 19.427 seconds
Number of clients running queries: 1000
Average number of queries per client: 0
分别并发1000个连接
/ Mysql先并发1000个连接
[root@Centos7 ~]# mysqlslap -a -c 1000
Benchmark
Average number of seconds to run all queries: 28.096 seconds
Minimum number of seconds to run all queries: 28.096 seconds
Maximum number of seconds to run all queries: 28.096 seconds
Number of clients running queries: 1000
Average number of queries per client: 0
/ MariaDB 后续并发1000个连接
[root@Centos7 ~]# mysqlslap -a -c 1000
Benchmark
Average number of seconds to run all queries: 14.042 seconds
Minimum number of seconds to run all queries: 14.042 seconds
Maximum number of seconds to run all queries: 14.042 seconds
Number of clients running queries: 1000
Average number of queries per client: 0
总结：由此比对得出同时并发时，mysql跟MariaDB差距太大，可以达到2倍差距，分开并发MariaDB比mysql提高60%性能
原创文章，作者：晴川运维，如若转载，请注明出处：https://baike.qcidc.com/14115.html
