# Buffers, Caches and Threads

- [Query Cache](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/query-cache.md): Complete MariaDB performance optimization guide. Complete reference for query tuning, indexing strategies, and configuration improvements for production use.
- [Thread Command Values](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-command-values.md)
- [Thread Pool](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-pool.md): Optimize MariaDB Server with the thread pool. This section explains how to manage connections and improve performance by efficiently handling concurrent client requests, reducing resource overhead.
- [Thread Pool in MariaDB](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-pool/thread-pool-in-mariadb.md)
- [Thread Groups in the Unix Implementation of the Thread Pool](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-pool/thread-groups-in-the-unix-implementation-of-the-thread-pool.md)
- [Thread Pool System and Status Variables](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-pool/thread-pool-system-status-variables.md)
- [Thread Pool in MariaDB 5.1 - 5.3](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-pool/thread-pool-in-mariadb-51-53.md)
- [Thread States](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-states.md): Understand MariaDB Server thread states. This section explains the different states a thread can be in, helping you monitor and troubleshoot query execution and server performance.
- [Delayed Insert Connection Thread States](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-states/delayed-insert-connection-thread-states.md)
- [Delayed Insert Handler Thread States](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-states/delayed-insert-handler-thread-states.md)
- [Event Scheduler Thread States](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-states/event-scheduler-thread-states.md)
- [Galera Cluster Thread States](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-states/galera-cluster-thread-states.md)
- [General Thread States](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-states/general-thread-states.md)
- [Master Thread States](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-states/master-thread-states.md)
- [Query Cache Thread States](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-states/query-cache-thread-states.md)
- [Replica I/O Thread States](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-states/replica-io-thread-states.md)
- [Replica Connection Thread States](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-states/slave-connection-thread-states.md)
- [Replica SQL Thread States](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/buffers-caches-and-threads/thread-states/slave-sql-thread-states.md)


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