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server: add active multiplexed subscriptions metrics
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/8644 Co-authored-by: Rob Dominguez <24390149+robertjdominguez@users.noreply.github.com> GitOrigin-RevId: ff1f646cd6a4b8dd5106db4693b2c6ad465ae052
This commit is contained in:
Karthikeyan Chinnakonda
hasura-bot
parent
170c95e887
commit
41ed0d369b
@ -109,14 +109,14 @@ curl 'http://127.0.0.1:8080/v1/metrics' -H 'Authorization: Bearer <secret>'
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<td>Histogram<br/><br/>Buckets: 0.01, 0.03, 0.1, 0.3, 1, 3, 10</td>
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<td>none</td>
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<td>A higher processing time indicates slow webhook, you should try to optimize the event webhook.</td>
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</tr>
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</tr>
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<tr>
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<td><code>hasura_event_processing_time_seconds</code></td>
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<td>The time taken for an event to be delivered since it's been created (if first attempt) or retried (after first attempt).</td>
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<td>Histogram<br/><br/>Buckets: 0.01, 0.03, 0.1, 0.3, 1, 3, 10, 30, 100</td>
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<td>none</td>
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<td>This metric can be considered as the end-to-end processing time for an event.</td>
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</tr>
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</tr>
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<tr>
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<td><code>hasura_event_trigger_http_workers</code></td>
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<td>Current number of active Event Trigger HTTP workers</td>
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@ -188,6 +188,24 @@ curl 'http://127.0.0.1:8080/v1/metrics' -H 'Authorization: Bearer <secret>'
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indicates high failure rate of the one-off webhook.
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</td>
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</tr>
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<tr>
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<td>
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<code>hasura_active_subscription_pollers</code>
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</td>
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<td>Current number of active subscription pollers. A subscription poller <a href="https://github.com/hasura/graphql-engine/blob/master/architecture/live-queries.md#idea-3-batch-multiple-live-queries-into-one-sql-query">multiplexes </a> similar subscriptions together.
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</td>
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<td>Gauge</td>
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<td>
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• "subscription_kind": streaming|live-query
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<br />
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</td>
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<td>
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The value of this metric is supposed to be proportional to the number of uniquely parameterised subscriptions i.e. subscriptions with the same selection set
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but with different input arguments and session variables are multiplexed on the same poller.
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If this metric is high then it may be an indication that there are too many uniquely parameterised subscriptions
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which could be optimized for better performance.
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</td>
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</tr>
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</table>
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@ -51,7 +51,7 @@ import Hasura.RQL.Types.Action
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import Hasura.RQL.Types.Common (SourceName)
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import Hasura.SQL.AnyBackend qualified as AB
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import Hasura.Server.Metrics (ServerMetrics (..))
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import Hasura.Server.Prometheus (PrometheusMetrics (..))
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import Hasura.Server.Prometheus (PrometheusMetrics (..), SubscriptionMetrics (..))
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import Hasura.Server.Types (RequestId)
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import Language.GraphQL.Draft.Syntax qualified as G
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import Refined (unrefine)
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@ -200,6 +200,7 @@ addLiveQuery
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let !pState = PollerIOState threadRef pollerId
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$assertNFHere pState -- so we don't write thunks to mutable vars
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STM.atomically $ STM.putTMVar (_pIOState poller) pState
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liftIO $ Prometheus.Gauge.inc $ submActiveLiveQueryPollers $ pmSubscriptionMetrics $ prometheusMetrics
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liftIO $ EKG.Gauge.inc $ smActiveSubscriptions serverMetrics
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liftIO $ Prometheus.Gauge.inc $ pmActiveSubscriptions prometheusMetrics
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@ -290,10 +291,12 @@ addStreamSubscriptionQuery
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let !pState = PollerIOState threadRef pollerId
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$assertNFHere pState -- so we don't write thunks to mutable vars
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STM.atomically $ STM.putTMVar (_pIOState handler) pState
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liftIO $ Prometheus.Gauge.inc $ submActiveStreamingPollers $ pmSubscriptionMetrics $ prometheusMetrics
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liftIO $ EKG.Gauge.inc $ smActiveSubscriptions serverMetrics
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liftIO $ Prometheus.Gauge.inc $ pmActiveSubscriptions prometheusMetrics
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liftIO $ EKG.Gauge.inc $ smActiveStreamingSubscriptions serverMetrics
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liftIO $ do
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EKG.Gauge.inc $ smActiveSubscriptions serverMetrics
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Prometheus.Gauge.inc $ pmActiveSubscriptions prometheusMetrics
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EKG.Gauge.inc $ smActiveStreamingSubscriptions serverMetrics
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pure $ SubscriberDetails handlerId (cohortKey, cohortCursorTVar) subscriberId
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where
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@ -362,7 +365,10 @@ removeLiveQuery logger serverMetrics prometheusMetrics lqState lqId@(SubscriberD
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return $
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Just $ -- deferred IO:
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case threadRefM of
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Just threadRef -> Immortal.stop threadRef
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Just threadRef -> do
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Immortal.stop threadRef
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liftIO $ Prometheus.Gauge.dec $ submActiveLiveQueryPollers $ pmSubscriptionMetrics prometheusMetrics
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-- This would seem to imply addLiveQuery broke or a bug
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-- elsewhere. Be paranoid and log:
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Nothing ->
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@ -388,9 +394,10 @@ removeStreamingQuery logger serverMetrics prometheusMetrics subscriptionState (S
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forM detM $ \(Poller cohorts ioState, currentCohortId, cohort) ->
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cleanHandlerC cohorts ioState (cohort, currentCohortId)
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sequence_ mbCleanupIO
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liftIO $ EKG.Gauge.dec $ smActiveSubscriptions serverMetrics
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liftIO $ Prometheus.Gauge.dec $ pmActiveSubscriptions prometheusMetrics
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liftIO $ EKG.Gauge.dec $ smActiveStreamingSubscriptions serverMetrics
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liftIO $ do
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EKG.Gauge.dec $ smActiveSubscriptions serverMetrics
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Prometheus.Gauge.dec $ pmActiveSubscriptions prometheusMetrics
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EKG.Gauge.dec $ smActiveStreamingSubscriptions serverMetrics
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where
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streamQMap = _ssStreamQueryMap subscriptionState
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@ -423,14 +430,19 @@ removeStreamingQuery logger serverMetrics prometheusMetrics subscriptionState (S
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return $
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Just $ -- deferred IO:
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case threadRefM of
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Just threadRef -> Immortal.stop threadRef
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Just threadRef -> do
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Immortal.stop threadRef
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liftIO $
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Prometheus.Gauge.dec $
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submActiveStreamingPollers $
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pmSubscriptionMetrics prometheusMetrics
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-- This would seem to imply addStreamSubscriptionQuery broke or a bug
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-- elsewhere. Be paranoid and log:
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Nothing ->
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L.unLogger logger $
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L.UnstructuredLog L.LevelError $
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fromString $
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"In removeLiveQuery no worker thread installed. Please report this as a bug: "
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"In removeStreamingQuery no worker thread installed. Please report this as a bug: "
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<> " poller_id: "
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<> show handlerId
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<> ", cohort_id: "
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@ -67,13 +67,13 @@ data
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"schema_cache_metadata_resource_version"
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'GaugeType
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()
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-- | Current number active live queries
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-- | Current number of subscribers connected to live queries
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ActiveLiveQueries ::
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ServerMetricsSpec
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"active_livequeries"
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'GaugeType
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()
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-- | Current number of streaming subscriptions
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-- | Current number of subscribers connected to streaming subscriptions
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ActiveStreaming ::
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ServerMetricsSpec
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"active_streaming_subscriptions"
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@ -103,18 +103,18 @@ data
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-- | Mutable references for the server metrics. See `ServerMetricsSpec` for a
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-- description of each metric.
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data ServerMetrics = ServerMetrics
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{ smWarpThreads :: !Gauge,
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smWebsocketConnections :: !Gauge,
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smActiveSubscriptions :: !Gauge,
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smNumEventsFetchedPerBatch :: !Distribution,
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smNumEventHTTPWorkers :: !Gauge,
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smEventQueueTime :: !Distribution,
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smSchemaCacheMetadataResourceVersion :: !Gauge,
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smActiveLiveQueries :: !Gauge,
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smActiveStreamingSubscriptions :: !Gauge,
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smEventFetchTimePerBatch :: !Distribution,
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smEventWebhookProcessingTime :: !Distribution,
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smEventProcessingTime :: !Distribution
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{ smWarpThreads :: Gauge,
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smWebsocketConnections :: Gauge,
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smActiveSubscriptions :: Gauge,
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smNumEventsFetchedPerBatch :: Distribution,
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smNumEventHTTPWorkers :: Gauge,
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smEventQueueTime :: Distribution,
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smSchemaCacheMetadataResourceVersion :: Gauge,
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smActiveLiveQueries :: Gauge,
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smActiveStreamingSubscriptions :: Gauge,
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smEventFetchTimePerBatch :: Distribution,
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smEventWebhookProcessingTime :: Distribution,
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smEventProcessingTime :: Distribution
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}
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createServerMetrics :: Store ServerMetricsSpec -> IO ServerMetrics
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@ -15,6 +15,7 @@ module Hasura.Server.Prometheus
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incWebsocketConnections,
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decWebsocketConnections,
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ScheduledTriggerMetrics (..),
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SubscriptionMetrics (..),
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)
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where
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@ -40,7 +41,8 @@ data PrometheusMetrics = PrometheusMetrics
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pmWebSocketBytesSent :: Counter,
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pmActionBytesReceived :: Counter,
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pmActionBytesSent :: Counter,
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pmScheduledTriggerMetrics :: ScheduledTriggerMetrics
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pmScheduledTriggerMetrics :: ScheduledTriggerMetrics,
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pmSubscriptionMetrics :: SubscriptionMetrics
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}
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data GraphQLRequestMetrics = GraphQLRequestMetrics
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@ -80,6 +82,11 @@ data ScheduledTriggerMetrics = ScheduledTriggerMetrics
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stmOneOffEventsProcessedTotalFailure :: Counter
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}
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data SubscriptionMetrics = SubscriptionMetrics
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{ submActiveLiveQueryPollers :: Gauge,
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submActiveStreamingPollers :: Gauge
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}
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-- | Create dummy mutable references without associating them to a metrics
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-- store.
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makeDummyPrometheusMetrics :: IO PrometheusMetrics
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@ -93,6 +100,7 @@ makeDummyPrometheusMetrics = do
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pmActionBytesReceived <- Counter.new
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pmActionBytesSent <- Counter.new
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pmScheduledTriggerMetrics <- makeDummyScheduledTriggerMetrics
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pmSubscriptionMetrics <- makeDummySubscriptionMetrics
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pure PrometheusMetrics {..}
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makeDummyGraphQLRequestMetrics :: IO GraphQLRequestMetrics
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@ -135,6 +143,12 @@ makeDummyScheduledTriggerMetrics = do
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stmOneOffEventsProcessedTotalFailure <- Counter.new
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pure ScheduledTriggerMetrics {..}
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makeDummySubscriptionMetrics :: IO SubscriptionMetrics
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makeDummySubscriptionMetrics = do
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submActiveLiveQueryPollers <- Gauge.new
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submActiveStreamingPollers <- Gauge.new
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pure SubscriptionMetrics {..}
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--------------------------------------------------------------------------------
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-- | A mutable reference for atomically sampling the number of websocket
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