MySQL是一款流行的開源關(guān)系型數(shù)據(jù)庫管理系統(tǒng)，具有高性能、高可靠性、易于管理等眾多優(yōu)點(diǎn)。在使用MySQL5.7的過程中，可能會遇到libaio.so.1庫文件缺失的情況。

libaio.so.1是Linux系統(tǒng)下提供異步I/O接口的庫文件，它是MySQL5.7進(jìn)行異步I/O操作的必要組件之一。如果系統(tǒng)中沒有安裝這個庫文件，MySQL5.7啟動時會提示錯誤信息。

[root@localhost ~]# service mysqld start
Redirecting to /bin/systemctl start mysqld.service
Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.
[root@localhost ~]# systemctl status mysqld.service
● mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
Active: failed (Result: start-limit) since Wed 2019-10-09 14:16:38 CST; 10s ago
Process: 12937 ExecStart=/usr/sbin/mysqld (code=exited, status=127)
Main PID: 12937 (code=exited, status=127)
Oct 09 14:16:38 localhost.localdomain systemd[1]: Failed to start MySQL Server.
Oct 09 14:16:38 localhost.localdomain systemd[1]: Unit mysqld.service entered failed state.
Oct 09 14:16:38 localhost.localdomain systemd[1]: mysqld.service failed.
Oct 09 14:16:38 localhost.localdomain systemd[1]: mysqld.service holdoff time over, scheduling restart.
Oct 09 14:16:38 localhost.localdomain systemd[1]: start request repeated too quickly for mysqld.service
Oct 09 14:16:38 localhost.localdomain systemd[1]: Failed to start MySQL Server.
Oct 09 14:16:38 localhost.localdomain systemd[1]: Unit mysqld.service entered failed state.
Oct 09 14:16:38 localhost.localdomain systemd[1]: mysqld.service failed.

解決這個問題的方法很簡單，只需要安裝libaio即可。

[root@localhost ~]# yum -y install libaio

安裝完成后，重新啟動MySQL即可。

[root@localhost ~]# service mysqld start

這樣MySQL就能正常啟動了。

總之，libaio.so.1的缺失可能會導(dǎo)致MySQL5.7的啟動失敗，需要及時安裝這個庫文件。