Applicable to:
- Plesk Onyx for Linux
Symptoms
The following error log can be found in
/var/log/apache2/error.log
for Debian/Ubuntu OS and in
/var/log/httpd/error_log
for CentOS/Redhat OS:
CONFIG_TEXT: [Tue Oct 03 10:32:41.965156 2017] [pagespeed:error] [pid 23476] [mod_pagespeed 1.12.34.2-0 @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
Cause
Slow disk I/O performance.
Resolution
PageSpeed is logging this error because reading the file from its cache takes 4039.37ms.
To solve the issue adjust disk I/O performance.
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