                         if that._error_thresh
                             error_timer   = setTimeout(error_too_long,   that._error_thresh*1000)
 
-                        winston.debug("[#{that._concurrent_queries} concurrent]  rethink: query -- '#{query_string}'")
-                        if that._concurrent_queries > that._concurrent_warn
-                            winston.debug("rethink: *** concurrent_warn *** CONCURRENT WARN THRESHOLD EXCEEDED!")
                         g = (err, x) ->
                             report_time = ->
                                 that._concurrent_queries -= 1

            all_hosts: false      # if true, finds all hosts based on querying the server then connects to them
            warning  : 30          # display warning and stop using connection if run takes this many seconds or more
            error    : 10*60       # kill any query that takes this long (and corresponding connection)
            concurrent_warn : 500  # if number of concurrent outstanding db queries exceeds this number, put a concurrent_warn message in the log.
            mod_warn : 2           # display MOD_WARN warning in log if any query modifies at least this many docs
            cache_expiry  : 15000  # expire cached queries after this many milliseconds (default: 15s)
            cache_size    : 250    # cache this many queries; use @...query.run({cache:true}, cb) to cache result for a few seconds

        @_error_thresh     = opts.error
        @_mod_warn         = opts.mod_warn
        @_concurrent_warn  = opts.concurrent_warn
        @_concurrent_error = opts.concurrent_error
        @_all_hosts        = opts.all_hosts
        @_stats_cached     = undefined
        @_user_query_stats = new UserQueryStats(@dbg("user_query_stats"))
