> ## Documentation Index
> Fetch the complete documentation index at: https://docs.risingwave.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Barrier pending for too long

> Diagnose and resolve a barrier pending alert in RisingWave Cloud.

This alert indicates that no barrier has been committed in your project for longer than the configured threshold. Data freshness can be affected while barriers remain pending.

## Common triggers

* Streaming graph bottlenecks. Typical causes include join amplification, insufficient resources, and suboptimal streaming queries such as over-window queries and joins.
* Compaction write stalls that result in longer barrier synchronization times.

## Diagnosis

* Check CPU and memory utilization for all nodes. If the nodes are fully utilized, the project might have insufficient resources.
* Run `SHOW JOBS` and check for jobs that are being created. Backfilling a newly created job can increase pressure on the project.

## Resolution

If node resources are fully utilized or a backfill is running, scale out the project to alleviate the pressure. For more information, see [Scale a project manually](/cloud/scale-a-project-manually).

## Related topics

* [Monitor messages and alerts](/cloud/monitor-messages-and-alerts)