new stats collector

core/txpool/queue.go

@@ -120,6 +120,7 @@ func (q *queue) add(tx *types.Transaction) (*common.Hash, error) {
 	from, _ := types.Sender(q.signer, tx) // already validated
 	if q.queued[from] == nil {
 		q.queued[from] = newList(false)
+		queuedAddrsGauge.Inc(1)
 	}
 	inserted, old := q.queued[from].Add(tx, q.config.PriceBump)
 	if !inserted {
@@ -196,6 +197,7 @@ func (q *queue) promoteExecutables(accounts []common.Address, gasLimit uint64, c
 		if list.Empty() {
 			delete(q.queued, addr)
 			delete(q.beats, addr)
+			queuedAddrsGauge.Dec(1)
 			removedAddresses = append(removedAddresses, addr)
 		}
 	}

core/txpool/txpool.go

@@ -134,6 +134,9 @@ var (
 
 	slotsGauge = metrics.NewRegisteredGauge("txpool/slots", nil)
 
+	pendingAddrsGauge = metrics.NewRegisteredGauge("txpool/pending/accounts", nil)
+	queuedAddrsGauge  = metrics.NewRegisteredGauge("txpool/queued/accounts", nil)
+
 	reheapTimer = metrics.NewRegisteredTimer("txpool/reheap", nil)
 )
 
@@ -863,6 +866,7 @@ func (pool *TxPool) promoteTx(addr common.Address, hash common.Hash, tx *types.T
 	// Try to insert the transaction into the pending queue
 	if pool.pending[addr] == nil {
 		pool.pending[addr] = newList(true)
+		pendingAddrsGauge.Inc(1)
 	}
 	list := pool.pending[addr]
 
@@ -1073,6 +1077,7 @@ func (pool *TxPool) removeTx(hash common.Hash, outofbound bool, unreserve bool)
 			// If no more pending transactions are left, remove the list
 			if pending.Empty() {
 				delete(pool.pending, addr)
+				pendingAddrsGauge.Dec(1)
 			}
 			// Postpone any invalidated transactions
 			for _, tx := range invalids {
@@ -1365,6 +1370,9 @@ func (pool *TxPool) reset(oldHead, newHead *types.Header) {
 	pool.currentState = statedb
 	pool.pendingNonces = newNoncer(statedb)
 
+	pendingAddrsGauge.Update(0)
+	queuedAddrsGauge.Update(0)
+
 	// Inject any transactions discarded due to reorgs
 	log.Debug("Reinjecting stale transactions", "count", len(reinject))
 	core.SenderCacher.Recover(pool.signer, reinject)
@@ -1568,6 +1576,7 @@ func (pool *TxPool) demoteUnexecutables() {
 		// Delete the entire pending entry if it became empty.
 		if list.Empty() {
 			delete(pool.pending, addr)
+			pendingAddrsGauge.Dec(1)
 			if _, ok := pool.queue.get(addr); !ok {
 				pool.reserver.Release(addr)
 			}