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Add a metric to count the EVM block processing time during event ingestion #944

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Merged
m-Peter merged 3 commits into from
Jan 13, 2026
Merged

Add a metric to count the EVM block processing time during event ingestion #944

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c909dea
Add a metric to count the EVM block processing time during event inge…
m-Peter Dec 22, 2025
bc60701
Use summary instead of histogram for block process time metric
m-Peter Jan 13, 2026
e134ee5
Use prometheus.Summary for blockProcessTime field type
m-Peter Jan 13, 2026
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18 changes: 17 additions & 1 deletion metrics/collector.go
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Original file line number Diff line number Diff line change
Expand Up @@ -66,12 +66,20 @@ var gasEstimationIterations = prometheus.NewGauge(prometheus.GaugeOpts{
Help: "Number of iterations taken to estimate the gas of a EVM call/tx",
})

// Time difference between block proposal time and block indexing time
var blockIngestionTime = prometheus.NewHistogram(prometheus.HistogramOpts{
Name: prefixedName("block_ingestion_time_seconds"),
Help: "Time taken to fully ingest an EVM block in the local state index",
Help: "Latency from EVM block proposal time to indexing completion (wall-clock duration)",
Buckets: []float64{.5, 1, 2.5, 5, 10, 15, 20, 30, 45},
})

// EVM block processing time during event ingestion, including transaction replay
// and state validation
var blockProcessTime = prometheus.NewSummary(prometheus.SummaryOpts{
Name: prefixedName("block_process_time_seconds"),
Help: "Processing time to fully index an EVM block in the local state index",
})
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var requestRateLimitedCounters = prometheus.NewCounterVec(prometheus.CounterOpts{
Name: prefixedName("request_rate_limited"),
Help: "Total number of rate limits by JSON-RPC method",
Expand Down Expand Up @@ -105,6 +113,7 @@ var metrics = []prometheus.Collector{
availableSigningKeys,
gasEstimationIterations,
blockIngestionTime,
blockProcessTime,
requestRateLimitedCounters,
transactionsDroppedCounter,
rateLimitedTransactionsCounter,
Expand All @@ -123,6 +132,7 @@ type Collector interface {
AvailableSigningKeys(count int)
GasEstimationIterations(count int)
BlockIngestionTime(blockCreation time.Time)
BlockProcessTime(start time.Time)
RequestRateLimited(method string)
TransactionsDropped(count int)
TransactionRateLimited()
Expand All @@ -147,6 +157,7 @@ type DefaultCollector struct {
availableSigningkeys prometheus.Gauge
gasEstimationIterations prometheus.Gauge
blockIngestionTime prometheus.Histogram
blockProcessTime prometheus.Summary
requestRateLimitedCounters *prometheus.CounterVec
transactionsDroppedCounter prometheus.Counter
rateLimitedTransactionsCounter prometheus.Counter
Expand All @@ -173,6 +184,7 @@ func NewCollector(logger zerolog.Logger) Collector {
availableSigningkeys: availableSigningKeys,
gasEstimationIterations: gasEstimationIterations,
blockIngestionTime: blockIngestionTime,
blockProcessTime: blockProcessTime,
requestRateLimitedCounters: requestRateLimitedCounters,
transactionsDroppedCounter: transactionsDroppedCounter,
rateLimitedTransactionsCounter: rateLimitedTransactionsCounter,
Expand Down Expand Up @@ -243,6 +255,10 @@ func (c *DefaultCollector) BlockIngestionTime(blockCreation time.Time) {
Observe(time.Since(blockCreation).Seconds())
}

func (c *DefaultCollector) BlockProcessTime(start time.Time) {
c.blockProcessTime.Observe(time.Since(start).Seconds())
}

func (c *DefaultCollector) RequestRateLimited(method string) {
c.requestRateLimitedCounters.With(
prometheus.Labels{
Expand Down
1 change: 1 addition & 0 deletions metrics/nop.go
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Expand Up @@ -22,6 +22,7 @@ func (c *nopCollector) OperatorBalance(balance uint64) {}
func (c *nopCollector) AvailableSigningKeys(count int) {}
func (c *nopCollector) GasEstimationIterations(count int) {}
func (c *nopCollector) BlockIngestionTime(blockCreation time.Time) {}
func (c *nopCollector) BlockProcessTime(start time.Time) {}
func (c *nopCollector) RequestRateLimited(method string) {}
func (c *nopCollector) TransactionsDropped(count int) {}
func (c *nopCollector) TransactionRateLimited() {}
Expand Down
3 changes: 3 additions & 0 deletions services/ingestion/engine.go
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Expand Up @@ -184,11 +184,14 @@ func (e *Engine) processEvents(events *models.CadenceEvents) error {
Int("cadence-event-length", events.Length()).
Msg("received new cadence evm events")

start := time.Now()
err := e.withBatch(
func(batch *pebbleDB.Batch) error {
return e.indexEvents(events, batch)
},
)
e.collector.BlockProcessTime(start)

if err != nil {
return fmt.Errorf("failed to index events for cadence block %d: %w", events.CadenceHeight(), err)
}
Expand Down
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