We use google cloud engine to host our wordpress website, and it never encounter this issue before.
But this issue happened with this theme. After keeping for about 10 ~ 20 pages in the browser at the same time, the server stuck, we could not to connect to our website anymore until we restart the computer which hosted the server.
The site is not published yet, so think 10 ~ 20 pages or less should not cause the server usage problem.
And here is the computer statistic after the problem happened.
It keeps Read 5MB/s after the problem happened, but the network usage is low.
So I want to consult you. Did you have experience on this issue? I think this problem probably comes from your theme, because other plugin we used on this computer didn’t have any problem in other wordpress instance with same server configuration.
Any suggestion, idean and discussion is great, Thank!