How to solve mysql warning: "InnoDB: page_cleaner: 1000ms intended loop took XXX ms. The settings might not be optimal "?

I ran a mysql import mysql dummyctrad < dumpfile.sql on server and its taking too long to complete. The dump file is about 5G. The server is a Centos 6, memory=16G and 8core processors, mysql v 5.7 x64- Are these normal messages/status "waiting for table flush" and the message InnoDB: page_cleaner: 1000ms intended loop took 4013ms. The settings might not be optimal mysql log contents 2016-12-13T10

[tettekete37564]

インポートを行ったときに出たものであれば気にしなくて良いようだ。