Update Piwik and tune for performance
GitLab's Piwik instance is very slow and viewing/searching reports frequently results in timeouts or 500 errors. Piwik's latest version is 3.0.4 and GitLab's is at version 2.16.2. Is there any reason to not update? I'm also unsure if it's tuned for performance.
Some links that might help optimizing Piwik: