Andrew Klimek

If the log is long, the latest lines are show at the top to avoid scrolling. Line numbers are shown for reference.
Logs over 5MB do not load until you confirm you are sure, or you can opt to delete the log and start afresh.
Only admins can view (or anyone you give the capability “manage_options”).
Debug Log only works if it’s enabled in wp-config.php. See https://codex.wordpress.org/Debugging_in_WordPress#WP_DEBUG_LOG
Recommended configuration:
<pre><code>define( 'WP_DEBUG', true );// just toggle this line to false to turn off
if ( WP_DEBUG ) {
 define( 'WP_DEBUG_LOG', true );
 define( 'WP_DEBUG_DISPLAY', false );
 @ini_set( 'display_errors', 0 );
}
</code></pre>

Debug Log

View and Delete the debug log from the Tools menu.  Extremely light and simple.

unifiedlogging

Unified Logging is Logging as a Service (LaaS). This plugin taps into php logging and sends the logging information to Unified Logging (http://www.unifiedlogging.com) so you can be notified if something goes wrong and then can review the messages.
To signup for a free account go to https://portal.unifiedlogging.com/signup/
After signing up visit your profile page (https://portal.unifiedlogging.com/profile/) and retrieve your submission url, access key and secret key then input these into the “Settings” page after the plugin is activated.
More info can be found at: http://blog.unifiedlogging.com/getting-started-with-unified-logging-wordpress-plugin/
Your data is sent over ssl and the secret key is used to create a hash to make sure the data is not tampered with.
NOTE: this plugin may work with earlier versions but has not been tested.

Unified Logging

The Unified Logging WordPress plugin enables php logging information to be sent to Unified Logging

Debug Log vs Unified Logging