# Troubleshoot clusters

Guides for diagnosing common cluster problems.




> For the complete documentation index, see [llms.txt](https://preview.materialize.com/materialize/40269/llms.txt).


If you're seeing unexpected cluster behavior, these guides can help you find
the cause:

- [Memory spikes](https://preview.materialize.com/materialize/40269/markdown-docs/clusters/troubleshoot-clusters/memory-spike/index.md)
- [CPU spikes](https://preview.materialize.com/materialize/40269/markdown-docs/clusters/troubleshoot-clusters/cpu-troubleshooting/index.md)
- [Hydration failures](https://preview.materialize.com/materialize/40269/markdown-docs/clusters/troubleshoot-clusters/hydration-failures/index.md)


## Pages in this section

- [Troubleshoot anomalies in CPU usage](https://preview.materialize.com/materialize/40269/markdown-docs/clusters/troubleshoot-clusters/cpu-troubleshooting/index.md): How to diagnose and resolve anomalies in cluster CPU utilization.
- [Troubleshoot anomalies in memory usage](https://preview.materialize.com/materialize/40269/markdown-docs/clusters/troubleshoot-clusters/memory-spike/index.md): Find what caused a cluster's memory to spike, and how to prevent it recurring.
- [Troubleshoot hydration failures](https://preview.materialize.com/materialize/40269/markdown-docs/clusters/troubleshoot-clusters/hydration-failures/index.md): Diagnose a cluster that never finishes hydrating, and the conditions that make hydration cost more than it used to.