When configured for StatsD, Mastodon sends a massive amount of data to New Relic. This can quickly overwhelm New Relic's 100GB free tier, even for small servers. Server admin can mitigate this using drop data rules.

1. Open the NerdGraph API Explorer
2. Execute a query to create the appropriate drop rule

Example drop rule

My drop rules discards everything but the Sidekick data.

Note that this will result in dropping data, so run it at your own risk. Your account ID is available in the URL bar.

mutation {
  nrqlDropRulesCreate(
    accountId: YOUR_ACCOUNT_ID
    rules: [
      {
        action: DROP_DATA
        nrql: "SELECT * FROM Metric WHERE metricName LIKE 'Mastodon.production.%' AND metricName NOT LIKE 'Mastodon.production.sidekiq.queues.%'"
        description: "Drops most Mastodon stats"
      }
    ]
  ) {
    successes {
      id
    }
    failures {
      submitted {
        nrql
      }
      error {
        reason
        description
      }
    }
  }
}

View existing drop rules

Query your existing drop rules using the Query Builder (your account ID is available in the URL bar):

{
  actor {
    account(id: YOUR_ACCOUNT_ID) {
      nrqlDropRules {
        list {
          rules {
            id
            nrql
            accountId
            action
            createdBy
            createdAt
            description
          }
          error {
            reason
            description
          }
        }
      }
    }
  }
}

Code change alternative

As an alternative, you can remove specific stat collectors from config/initializers/statsd.rb.