- Plesk Onyx for Linux
The following error log can be found in
for Debian/Ubuntu OS and in
for CentOS/Redhat OS:
CONFIG_TEXT: [Tue Oct 03 10:32:41.965156 2017] [pagespeed:error] [pid 23476] [mod_pagespeed 18.104.22.168-0 @23476] Slow ReadFile operation on file /var/cache/mod_pagespeed/v3/example.com/https,3A/,2Fwww.example.com/forums,: 4039.37ms; configure SlowFileLatencyUs to change threshold\n
Slow disk I/O performance.
PageSpeed is logging this error because reading the file from its cache takes 4039.37ms.
To solve the issue adjust disk I/O performance.