[root@4532fe637760 /]# cat /etc/redhat-release
CentOS Linux release 7.3.1611 (Core)
[root@4532fe637760 /]# ps -ef | grep mysql
root       461     1  0 05:27 ?        00:00:00 /bin/sh /usr/bin/mysqld_safe
mysql      611   461  0 05:27 ?        00:00:00 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --log-error=/var/log/mysqld.log --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/lib/mysql/mysql.sock
root       642    20  0 05:28 ?        00:00:00 grep --color=auto mysql
[root@4532fe637760 /]# head /var/log/mysqld.log
2017-07-10 05:27:04 611 [Note] Plugin 'FEDERATED' is disabled.
2017-07-10 05:27:04 611 [Note] InnoDB: innodb_empty_free_list_algorithm has been changed to legacy because of small buffer pool size. In order to use backoff, increase buffer pool at least up to 20MB.

2017-07-10 05:27:04 611 [Note] InnoDB: Using atomics to ref count buffer pool pages
2017-07-10 05:27:04 611 [Note] InnoDB: The InnoDB memory heap is disabled
2017-07-10 05:27:04 611 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2017-07-10 05:27:04 611 [Note] InnoDB: Memory barrier is not used
2017-07-10 05:27:04 611 [Note] InnoDB: Compressed tables use zlib 1.2.7
2017-07-10 05:27:04 611 [Note] InnoDB: Using Linux native AIO
2017-07-10 05:27:04 611 [Note] InnoDB: Using CPU crc32 instructions
[root@4532fe637760 /]# date
Mon Jul 10 05:29:30 UTC 2017
[root@4532fe637760 /]# systemctl restart mysqld.service
[root@4532fe637760 /]# mysqladmin status
Uptime: 65  Threads: 1  Questions: 4  Slow queries: 0  Opens: 67  Flush tables: 1  Open tables: 60  Queries per second avg: 0.061
[root@4532fe637760 /]# head /var/log/mysqld.log
2017-07-10 05:29:55 825 [Note] Plugin 'FEDERATED' is disabled.
2017-07-10 05:29:55 825 [Note] InnoDB: innodb_empty_free_list_algorithm has been changed to legacy because of small buffer pool size. In order to use backoff, increase buffer pool at least up to 20MB.

2017-07-10 05:29:55 825 [Note] InnoDB: Using atomics to ref count buffer pool pages
2017-07-10 05:29:55 825 [Note] InnoDB: The InnoDB memory heap is disabled
2017-07-10 05:29:55 825 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2017-07-10 05:29:55 825 [Note] InnoDB: Memory barrier is not used
2017-07-10 05:29:55 825 [Note] InnoDB: Compressed tables use zlib 1.2.7
2017-07-10 05:29:55 825 [Note] InnoDB: Using Linux native AIO
2017-07-10 05:29:55 825 [Note] InnoDB: Using CPU crc32 instructions
[root@4532fe637760 /]# mysqld --version
mysqld  Ver 5.6.36-82.0 for Linux on x86_64 (Percona Server (GPL), Release 82.0, Revision 58e846a)