执行 pt-query-digest slow.log > digest.log 命令时报错：

[root@CentOS-CLI-MySql data]# pt-query-digest slow.log > digest.log

Can't locate Digest/MD5.pm in @INC (@INC contains:

BEGIN failed--compilation aborted at /usr/local/toolkit/bin/pt-query-digest line 2470.

[root@CentOS-CLI-MySql data]# 

原因是：缺少perl-Digest-MD5包， 安装perl-Digest-MD5即可解决。

[root@CentOS-CLI-MySql data]# yum -y install perl-Digest-MD5