Ok, that's part of the OMI package included in the Azure's instance and shouldn't affect the NGINX performance.
The error messages I found in the NGINX log were from August 18th, did you restart the server or make any change in the configuration that day? I don't know if you still receive errors like that one in the log, can you verify it?
tail -n20 /opt/bitnami/nginx/logs/error.log
I also found this in the PHP-FPM's log file
[18-Aug-2020 16:20:49] WARNING: [pool www] server reached max_children setting (5), consider raising it
That means that at that time your server was receiving more requests that the ones it supports (based on the configuration). You can try to increase the max_children parameter in the /opt/bitnami/php/etc/bitnami/common.conf file and restart the services for the changes to take effect
sudo /opt/bitnami/ctslcript.sh restart php-fpm
You can also take a look at this guide in our documentation to investigate if a bot or attacker is requesting your site so many times that generates those failures.
Happy to help!
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