method

keep_alive

v8.1.1 - Show latest stable - 0 notes - Class: ActiveRecord::ConnectionAdapters::ConnectionPool

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What's this?

keep_alive(threshold = @keepalive) public

Prod any connections that have been idle for longer than the configured keepalive time. This will incidentally verify the connection is still alive, but the main purpose is to show the server (and any intermediate network hops) that we’re still here and using the connection.

Show source

# File activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb, line 825
      def keep_alive(threshold = @keepalive)
        return if threshold.nil?

        sequential_maintenance -> c { (c.seconds_since_last_activity || 0) > c.pool_jitter(threshold) } do |conn|
          # conn.active? will cause some amount of network activity, which is all
          # we need to provide a keepalive signal.
          #
          # If it returns false, the connection is already broken; disconnect,
          # so it can be found and repaired.
          conn.disconnect! unless conn.active?
        end
      end

keep_alive

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