The "Abuse Filter - Slow Filters" logstash dashboard has not updated since November 15. We usually see some 50 or so hits a day, so I suspect there is a problem and slow filters are no longer being reported.
Link (you'll have to manually choose "Last 30 days" as the timeframe):
https://logstash.wikimedia.org/app/kibana#/dashboard/941a0560-b9b2-11e7-a3f7-cb9288bcae84?_g=(refreshInterval%3A(display%3AOff%2Cpause%3A!f%2Cvalue%3A0)%2Ctime%3A(from%3Anow-30d%2Cmode%3Aquick%2Cto%3Anow))