MM-57882 Add metric for the time it takes to open the Threads list (#26983)

* MM-57882 Add metric for the time it takes to open the Threads list

* Clean up mark because the starting mark may be missing

* Pass global threads load duration to Prometheus

* Update mocks

server/channels/app/metrics.go

@@ -42,6 +42,8 @@ func (a *App) RegisterPerformanceReport(rctx request.CTX, report *model.Performa
 			a.Metrics().ObserveClientTeamSwitchDuration(commonLabels["platform"], commonLabels["agent"], h.Value/1000)
 		case model.ClientRHSLoadDuration:
 			a.Metrics().ObserveClientRHSLoadDuration(commonLabels["platform"], commonLabels["agent"], h.Value/1000)
+		case model.ClientGlobalThreadsLoadDuration:
+			a.Metrics().ObserveGlobalThreadsLoadDuration(commonLabels["platform"], commonLabels["agent"], h.Value/1000)
 		default:
 			// we intentionally skip unknown metrics
 		}

server/einterfaces/metrics.go

@@ -112,4 +112,5 @@ type MetricsInterface interface {
 	ObserveClientChannelSwitchDuration(platform, agent string, elapsed float64)
 	ObserveClientTeamSwitchDuration(platform, agent string, elapsed float64)
 	ObserveClientRHSLoadDuration(platform, agent string, elapsed float64)
+	ObserveGlobalThreadsLoadDuration(platform, agent string, elapsed float64)
 }

server/einterfaces/mocks/MetricsInterface.go

@@ -353,6 +353,11 @@ func (_m *MetricsInterface) ObserveFilesSearchDuration(elapsed float64) {
 	_m.Called(elapsed)
 }
 
+// ObserveGlobalThreadsLoadDuration provides a mock function with given fields: platform, agent, elapsed
+func (_m *MetricsInterface) ObserveGlobalThreadsLoadDuration(platform string, agent string, elapsed float64) {
+	_m.Called(platform, agent, elapsed)
+}
+
 // ObservePluginAPIDuration provides a mock function with given fields: pluginID, apiName, success, elapsed
 func (_m *MetricsInterface) ObservePluginAPIDuration(pluginID string, apiName string, success bool, elapsed float64) {
 	_m.Called(pluginID, apiName, success, elapsed)

server/enterprise/metrics/metrics.go

@@ -211,15 +211,16 @@ type MetricsInterfaceImpl struct {
 	NotificationNotSentCounters     *prometheus.CounterVec
 	NotificationUnsupportedCounters *prometheus.CounterVec
 
-	ClientTimeToFirstByte        *prometheus.HistogramVec
-	ClientFirstContentfulPaint   *prometheus.HistogramVec
-	ClientLargestContentfulPaint *prometheus.HistogramVec
-	ClientInteractionToNextPaint *prometheus.HistogramVec
-	ClientCumulativeLayoutShift  *prometheus.HistogramVec
-	ClientLongTasks              *prometheus.CounterVec
-	ClientChannelSwitchDuration  *prometheus.HistogramVec
-	ClientTeamSwitchDuration     *prometheus.HistogramVec
-	ClientRHSLoadDuration        *prometheus.HistogramVec
+	ClientTimeToFirstByte           *prometheus.HistogramVec
+	ClientFirstContentfulPaint      *prometheus.HistogramVec
+	ClientLargestContentfulPaint    *prometheus.HistogramVec
+	ClientInteractionToNextPaint    *prometheus.HistogramVec
+	ClientCumulativeLayoutShift     *prometheus.HistogramVec
+	ClientLongTasks                 *prometheus.CounterVec
+	ClientChannelSwitchDuration     *prometheus.HistogramVec
+	ClientTeamSwitchDuration        *prometheus.HistogramVec
+	ClientRHSLoadDuration           *prometheus.HistogramVec
+	ClientGlobalThreadsLoadDuration *prometheus.HistogramVec
 }
 
 func init() {
@@ -1232,6 +1233,17 @@ func New(ps *platform.PlatformService, driver, dataSource string) *MetricsInterf
 	)
 	m.Registry.MustRegister(m.ClientRHSLoadDuration)
 
+	m.ClientGlobalThreadsLoadDuration = prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: MetricsNamespace,
+			Subsystem: MetricsSubsystemClientsWeb,
+			Name:      "global_threads_load",
+			Help:      "Duration of the time taken from when a user clicks to open Threads in the LHS until when the global threads view becomes visible (milliseconds)",
+		},
+		[]string{"platform", "agent"},
+	)
+	m.Registry.MustRegister(m.ClientGlobalThreadsLoadDuration)
+
 	return m
 }
 
@@ -1726,6 +1738,10 @@ func (mi *MetricsInterfaceImpl) ObserveClientRHSLoadDuration(platform, agent str
 	mi.ClientRHSLoadDuration.With(prometheus.Labels{"platform": platform, "agent": agent}).Observe(elapsed)
 }
 
+func (mi *MetricsInterfaceImpl) ObserveGlobalThreadsLoadDuration(platform, agent string, elapsed float64) {
+	mi.ClientGlobalThreadsLoadDuration.With(prometheus.Labels{"platform": platform, "agent": agent}).Observe(elapsed)
+}
+
 func extractDBCluster(driver, connectionString string) (string, error) {
 	host, err := extractHost(driver, connectionString)
 	if err != nil {

server/public/model/metrics.go

@@ -14,15 +14,16 @@ import (
 type MetricType string
 
 const (
-	ClientTimeToFirstByte        MetricType = "TTFB"
-	ClientFirstContentfulPaint   MetricType = "FCP"
-	ClientLargestContentfulPaint MetricType = "LCP"
-	ClientInteractionToNextPaint MetricType = "INP"
-	ClientCumulativeLayoutShift  MetricType = "CLS"
-	ClientLongTasks              MetricType = "long_tasks"
-	ClientChannelSwitchDuration  MetricType = "channel_switch"
-	ClientTeamSwitchDuration     MetricType = "team_switch"
-	ClientRHSLoadDuration        MetricType = "rhs_load"
+	ClientTimeToFirstByte           MetricType = "TTFB"
+	ClientFirstContentfulPaint      MetricType = "FCP"
+	ClientLargestContentfulPaint    MetricType = "LCP"
+	ClientInteractionToNextPaint    MetricType = "INP"
+	ClientCumulativeLayoutShift     MetricType = "CLS"
+	ClientLongTasks                 MetricType = "long_tasks"
+	ClientChannelSwitchDuration     MetricType = "channel_switch"
+	ClientTeamSwitchDuration        MetricType = "team_switch"
+	ClientRHSLoadDuration           MetricType = "rhs_load"
+	ClientGlobalThreadsLoadDuration MetricType = "global_threads_load"
 
 	performanceReportTTLMilliseconds = 300 * 1000 // 300 seconds/5 minutes
 )