common

var (
	// RedoWriteBytesGauge records the total number of bytes written to redo log.
	RedoWriteBytesGauge = prometheus.NewGaugeVec(prometheus.GaugeOpts{
		Namespace: namespace,
		Subsystem: subsystem,
		Name:      "write_bytes_total",
		Help:      "Total number of bytes redo log written",
	}, []string{"namespace", "changefeed"})

	// RedoFsyncDurationHistogram records the latency distributions of fsync called by redo writer.
	RedoFsyncDurationHistogram = prometheus.NewHistogramVec(prometheus.HistogramOpts{
		Namespace: namespace,
		Subsystem: subsystem,
		Name:      "fsync_duration_seconds",
		Help:      "The latency distributions of fsync called by redo writer",
		Buckets:   prometheus.ExponentialBuckets(0.001, 2.0, 13),
	}, []string{"namespace", "changefeed"})

	// RedoFlushAllDurationHistogram records the latency distributions of flushAll
	// called by redo writer.
	RedoFlushAllDurationHistogram = prometheus.NewHistogramVec(prometheus.HistogramOpts{
		Namespace: namespace,
		Subsystem: subsystem,
		Name:      "flushall_duration_seconds",
		Help:      "The latency distributions of flushall called by redo writer",
		Buckets:   prometheus.ExponentialBuckets(0.001, 2.0, 13),
	}, []string{"namespace", "changefeed"})

	// RedoTotalRowsCountGauge records the total number of rows written to redo log.
	RedoTotalRowsCountGauge = prometheus.NewGaugeVec(prometheus.GaugeOpts{
		Namespace: namespace,
		Subsystem: subsystem,
		Name:      "total_rows_count",
		Help:      "The total count of rows that are processed by redo writer",
	}, []string{"namespace", "changefeed"})

	// RedoWriteLogDurationHistogram records the latency distributions of writeLog.
	RedoWriteLogDurationHistogram = prometheus.NewHistogramVec(prometheus.HistogramOpts{
		Namespace: namespace,
		Subsystem: subsystem,
		Name:      "write_log_duration_seconds",
		Help:      "The latency distributions of writeLog called by redoManager",
		Buckets:   prometheus.ExponentialBuckets(0.001, 2.0, 13),
	}, []string{"namespace", "changefeed"})

	// RedoFlushLogDurationHistogram records the latency distributions of flushLog.
	RedoFlushLogDurationHistogram = prometheus.NewHistogramVec(prometheus.HistogramOpts{
		Namespace: namespace,
		Subsystem: subsystem,
		Name:      "flush_log_duration_seconds",
		Help:      "The latency distributions of flushLog called by redoManager",
		Buckets:   prometheus.ExponentialBuckets(0.001, 2.0, 13),
	}, []string{"namespace", "changefeed"})

	// RedoWorkerBusyRatio records the busy ratio of redo bgUpdateLog worker.
	RedoWorkerBusyRatio = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Namespace: namespace,
			Subsystem: subsystem,
			Name:      "worker_busy_ratio",
			Help:      "Busy ratio (X ms in 1s) for redo bgUpdateLog worker.",
		}, []string{"namespace", "changefeed"})
)