Linux automatically uses available RAM for disk caching to improve performance. However, during troubleshooting, benchmarking, or memory-related issues, you may need to manually clear cache in Linux without rebooting. This guide explains how to safely clear: Using the vm.drop_caches kernel parameter via the sysctl command. Understanding Linux Cache Memory Linux uses three primary types of cache: Cache Type Description Page Cache Stores file data to speed up disk reads Dentries Directory entry cache Inodes Metadata about files This caching improves performance. Clearing it unnecessarily can temporarily reduce system efficiency. When Should You Clear Cache in Linux? Clearing cache is useful when: Note: On production systems, clearing cache may temporarily degrade performance. How to Clear Cache in Linux Without Rebooting Step …
