🚀 Optimizing Linux Swappiness

By default, Linux has a "swappiness" value of 60. Lowering this to 10 tells the kernel to avoid using the slow disk swap and prioritize the fast physical RAM, which is critical for Wazuh Indexer performance. 
 
 
 
 1 
 
 
 
 
 Check Current Swappiness 
 Run this command to see your current value. It will likely return 60 . 
 sudo cat /proc/sys/vm/swappiness 
 
 
 
 
 
 
 2 
 
 
 
 
 Apply Immediate Change 
 Use the sysctl command to lower the value to 10 instantly without a reboot. 
 sudo sysctl vm.swappiness=10 
 
 
 
 
 
 
 3 
 
 
 
 
 Make Change Permanent 
 Add the configuration to /etc/sysctl.conf so the setting persists after the VM reboots. 
 sudo echo 'vm.swappiness=10' | sudo tee -a /etc/sysctl.conf 
 
 
 
 
 
 
 
 
 ✅ Verification 
 You have successfully reduced disk I/O wait times for the Wazuh Indexer. This helps prevent the VM from hanging when memory usage spikes during large data ingestions.