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Prefect insights
Open Source
Versions: []
22 metrics
OpenTelemetry
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Native
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Prometheus
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Datadog
Prefect
Long-running tasks monopolize worker resources and block concurrency
warning
prefect.task_run.duration
prefect.flow_run.duration
prefect.database.connections.active
linen.prefect.io
3mo ago
▸
Prefect
Worker pods incur orchestration overhead in Kubernetes work pools
info
prefect.work_pool.workers.active
prefect.server.api.request.duration
linen.prefect.io
3mo ago
▸
Prefect
Insufficient CPU or memory allocation causes worker and server pod overwhelm
critical
linen.prefect.io
3mo ago
▸
Prefect
Flow run status page causes CPU saturation due to canvas rendering
warning
github.com
8mo ago
▸
Prefect
task_runs/count API endpoint timeout prevents UI rendering
warning
prefect.server.api.request.duration
prefect.task_run.count
github.com
8mo ago
▸
Prefect
Flow Run Parameters page causes 100% CPU load without rendering
warning
github.com
8mo ago
▸
Prefect
Runs page load time increases to 10+ seconds after Prefect 3 upgrade
warning
prefect.server.api.request.duration
github.com
8mo ago
▸
Prefect
Tasks stuck in Running state with task.submit() pattern cause flow hangs
critical
prefect.task_run.duration
prefect.flow_run.duration
prefect.task_run.count
github.com
10mo ago
▸
Prefect
Pydantic MockValSer serialization error prevents container flow startup
critical
prefect.flow_run.crash
github.com
10mo ago
▸
Prefect
Runner AttributeError prevents cleanup after successful flow completion
warning
github.com
10mo ago
▸
Prefect
Flow run heartbeat events delayed until run completion
warning
prefect.agent.heartbeat
github.com
11mo ago
▸
Prefect
Events duplicated when emit_event used outside flow run context
warning
github.com
11mo ago
▸
Prefect
Database connection pool exhaustion causes severe API slowdown after Prefect 3.x upgrade
critical
prefect.server.api.request.duration
prefect.database.connections.active
prefect.database.query.duration
github.com
11mo ago
▸
Prefect
Background scheduler services exceed loop intervals under database contention
warning
github.com
11mo ago
▸
Prefect
SELECT FOR UPDATE queries on flow_run table block for multiple seconds despite indexing
critical
prefect.database.query.duration
github.com
11mo ago
▸
Prefect
PostgreSQL deadlocks cause API 500 errors under concurrent load
critical
github.com
11mo ago
▸
Prefect
Task run count API endpoint blocks UI with millions of task runs
critical
prefect.task_run.count
github.com
11mo ago
▸
Prefect
Database vacuum service disabled by default allows performance-degrading data accumulation
warning
github.com
11mo ago
▸
Prefect
Database deadlock on concurrent task_run inserts
critical
prefect.database.connections.active
prefect.task_run.count
prefect.database.query.duration
github.com
11mo ago
▸
Prefect
CancellationCleanup service execution exceeds loop interval
warning
prefect.database.query.duration
github.com
11mo ago
▸
Prefect
RecentDeploymentsScheduler execution exceeds loop interval
warning
prefect.database.query.duration
prefect.deployment.run_count
github.com
11mo ago
▸
Prefect
MarkLateRuns service execution exceeds loop interval
warning
prefect.flow_run.late
prefect.database.query.duration
prefect.flow_run.count
github.com
11mo ago
▸
Prefect
Tag concurrency limit deadlock with dependent tasks in Prefect 3.2.15+
critical
prefect.task_run.count
prefect.flow_run.duration
github.com
1y ago
▸
Prefect
PostgreSQL connection pool exhaustion causes Prefect server errors and worker crashes
critical
prefect.database.connections.active
prefect.work_pool.workers.active
prefect.flow_run.crash
github.com
1y ago
▸
Prefect
Worker exits unexpectedly when API server returns HTTP 500
critical
prefect.flow_run.crash
prefect.work_pool.workers.active
prefect.server.api.requests
github.com
1y ago
▸
Prefect
Flow runs stuck in PENDING state after worker crash
critical
prefect.flow_run.late
prefect.work_queue.late_runs
prefect.deployment.status
github.com
1y ago
▸
Prefect
API server overload at high scale causes HTTP 500 errors
warning
prefect.server.api.request.duration
prefect.server.api.requests
prefect.flow_run.count
+1 more
github.com
1y ago
▸
Prefect
Prefect server startup fails with individual database configuration parameters
critical
github.com
1y ago
▸
Prefect
Ghost runs persist when runners die without server notification
critical
prefect.flow_run.crash
prefect.agent.heartbeat
github.com
1y ago
▸
Prefect
Dead workers block concurrency slots indefinitely
warning
prefect.work_queue.depth
github.com
1y ago
▸