change consensus_block_interval_seconds metric type to gauge
Otherwise, it's impossible to see outliers https://github.com/tendermint/tendermint/issues/1835#issuecomment-402054099
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@ -21,5 +21,6 @@ FEATURES:
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IMPROVEMENTS:
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- [types] add Address to GenesisValidator [\#1714](https://github.com/tendermint/tendermint/issues/1714)
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- [metrics] `consensus.block_interval_metrics` is now gauge, not histogram (you will be able to see spikes, if any)
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BUG FIXES:
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@ -30,7 +30,7 @@ type Metrics struct {
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ByzantineValidatorsPower metrics.Gauge
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// Time between this and the last block.
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BlockIntervalSeconds metrics.Histogram
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BlockIntervalSeconds metrics.Gauge
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// Number of transactions.
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NumTxs metrics.Gauge
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@ -85,11 +85,11 @@ func PrometheusMetrics() *Metrics {
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Help: "Total power of the byzantine validators.",
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}, []string{}),
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BlockIntervalSeconds: prometheus.NewHistogramFrom(stdprometheus.HistogramOpts{
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BlockIntervalSeconds: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
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Subsystem: "consensus",
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Name: "block_interval_seconds",
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Help: "Time between this and the last block.",
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Buckets: []float64{1, 2.5, 5, 10, 60},
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}, []string{}),
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NumTxs: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
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@ -124,7 +124,7 @@ func NopMetrics() *Metrics {
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ByzantineValidators: discard.NewGauge(),
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ByzantineValidatorsPower: discard.NewGauge(),
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BlockIntervalSeconds: discard.NewHistogram(),
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BlockIntervalSeconds: discard.NewGauge(),
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NumTxs: discard.NewGauge(),
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BlockSizeBytes: discard.NewGauge(),
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@ -1374,7 +1374,7 @@ func (cs *ConsensusState) recordMetrics(height int64, block *types.Block) {
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if height > 1 {
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lastBlockMeta := cs.blockStore.LoadBlockMeta(height - 1)
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cs.metrics.BlockIntervalSeconds.Observe(
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cs.metrics.BlockIntervalSeconds.Set(
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block.Time.Sub(lastBlockMeta.Header.Time).Seconds(),
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)
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}
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