# Performance Tuning

- [Flow Control in Galera Cluster](https://mariadb.com/docs/galera-cluster/galera-management/performance-tuning/flow-control-in-galera-cluster.md): Flow Control in MariaDB Galera Cluster pauses replication when a slow node's receive queue grows past gcs.fc\_limit, preventing memory overflow and keeping all nodes synchronized.
- [Using Streaming Replication for Large Transactions](https://mariadb.com/docs/galera-cluster/galera-management/performance-tuning/using-streaming-replication-for-large-transactions.md): Streaming Replication splits long transactions into certified fragments in MariaDB Galera Cluster, reducing replication lag, easing Flow Control pressure, and avoiding aborts.


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