We have an issues with big amounts of IO waits alerts on Splunk indexers. After investigation I found there is no swap space used during all the time. Do you know how can I enable swap or swap file to be used by splunk indexer?   Service] Type=simple Restart=always ExecStart=/splunk/bin/splunk _internal_launch_under_systemd KillMode=mixed KillSignal=SIGINT TimeoutStopSec=360 LimitNOFILE=65536 SuccessExitStatus=51 52 RestartPreventExitStatus=51 RestartForceExitStatus=52 User=splunk Group=splunk Delegate=true CPUShares=1024 MemoryLimit=32654905344 PermissionsStartOnly=true ExecStartPost=/bin/bash -c "chown -R splunk:splunk /sys/fs/cgroup/cpu/system.slice/%n" ExecStartPost=/bin/bash -c "chown -R splunk:splunk /sys/fs/cgroup/memory/system.slice/%n" [Install] WantedBy=multi-user.target [root@splunk]# cat /proc/meminfo MemTotal: 31889556 kB MemFree: 1715036 kB   root@splunk ~]# free -m total used free shared buff/cache available Mem: 31142 5835 13411 1584 11895 23308 Swap: 0 0 0 ... View more