Tim's questions

Running a local centos 7 apache webserver, recently it stopped working. Journalctl don't say anything other then service failed. Only the error_log in /var/log/httpd/ says:

[core:notice] [pid 5026:tid 139693344536768] SELinux policy enabled; httpd running as context system_u:system_r:httpd_t:s0
[suexec:notice] [pid 5026:tid 139693344536768] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[core:emerg] [pid 5026:tid 139693344536768] (13)Permission denied: AH00023: Couldn't create the proxy mutex 
[proxy:crit] [pid 5026:tid 139693344536768] (13)Permission denied: AH02478: failed to create proxy mutex
AH00016: Configuration Failed

However I can't figure out what file is meant nor find on the internet anything to this one.

I'm using now the Google Cloud Platform for a few days but I did not manage to find a traffic usage chart or a chart in the console.cloud.google.com page showing which traffic goes in which region and how much it will charge me.