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Roomserver input backpressure metric
Squashed commit of the following: commit 56e934ac0aeedcfb2c072010959ba49734d4e0cb Author: Neil Alexander <neilalexander@users.noreply.github.com> Date: Fri Jul 2 09:39:30 2021 +0100 Fix metric commit 3911f3a0c17b164b012e881c085ceca30f5de408 Author: Neil Alexander <neilalexander@users.noreply.github.com> Date: Fri Jul 2 09:36:29 2021 +0100 Register correct metric commit a9ddbfaed421538a701151801e9451198a8be4f3 Author: Neil Alexander <neilalexander@users.noreply.github.com> Date: Fri Jul 2 09:33:33 2021 +0100 Try to capture RS input backpressure metric
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@ -28,6 +28,7 @@ import (
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"github.com/matrix-org/dendrite/roomserver/api"
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"github.com/matrix-org/dendrite/roomserver/storage"
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"github.com/matrix-org/gomatrixserverlib"
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"github.com/prometheus/client_golang/prometheus"
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log "github.com/sirupsen/logrus"
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"go.uber.org/atomic"
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)
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@ -64,6 +65,9 @@ func (w *inputWorker) start() {
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if !ok {
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continue
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}
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roomserverInputBackpressure.With(prometheus.Labels{
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"room_id": task.event.Event.RoomID(),
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}).Dec()
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hooks.Run(hooks.KindNewEventReceived, task.event.Event)
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_, task.err = w.r.processRoomEvent(task.ctx, task.event)
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if task.err == nil {
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@ -120,6 +124,20 @@ func (r *Inputer) WriteOutputEvents(roomID string, updates []api.OutputEvent) er
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return errs
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}
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func init() {
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prometheus.MustRegister(roomserverInputBackpressure)
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}
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var roomserverInputBackpressure = prometheus.NewGaugeVec(
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prometheus.GaugeOpts{
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Namespace: "dendrite",
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Subsystem: "roomserver",
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Name: "input_backpressure",
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Help: "How many events are queued for input for a given room",
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},
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[]string{"room_id"},
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)
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// InputRoomEvents implements api.RoomserverInternalAPI
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func (r *Inputer) InputRoomEvents(
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_ context.Context,
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@ -164,6 +182,9 @@ func (r *Inputer) InputRoomEvents(
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go worker.start()
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}
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worker.input.push(tasks[i])
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roomserverInputBackpressure.With(prometheus.Labels{
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"room_id": roomID,
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}).Inc()
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}
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// Wait for all of the workers to return results about our tasks.
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