View log messages that were logged by Matomo via the Matomo UI or HTTP Reporting API.
I want to see more than 100 log messages, is it possible?
Yes, there is a
limit URL parameter that you can change to any number.
Can I use regular expressions in the search field?
Yes, you can enable regular expressions next to the search field.
Is the search field case insensitive?
How is a Matomo (Piwik) log line formatted by default?
'$severity $tag[$datetime] [$requestId] $message eg
WARNING Matomo\Common[2015-01-01 01:02:03] [cf27] The log message
Is the search pattern applied to the whole log line?
Yes, this means a search for
WARNING Matomo\Common would deliver you all warnings triggered by
How do I find all messages that belong to a certain request?
Each log message shows a "Request Id". By clicking on this Id it selects all log messages of the same request.
Alternatively you can search for the expression
1234 need to be replaced by a Request Id.
How do I find messages that belong to the same day?
Either click on a date field or search for it, eg
What are the known issues?