(Optional) Enabling Memory Overcommitment

If multiple cloud phone instances use the same image for containerized deployment on a server, there will be many identical memory pages, wasting memory resources. If you use the openEuler 5.10.0-182.0.0 or 5.10.0-216.0.0 kernel, you can enable the Kernel Samepage Merging (KSM) feature for container data deduplication. This feature merges identical anonymous pages to release memory space.

1. Enable the KSM daemon on the server.

   echo 1 > /sys/kernel/mm/ksm/run

   Adjusting the KSM parameters pages_to_scan and sleep_millisecs can reduce the optimization time, but the CPU usage will increase.

   • pages_to_scan indicates the number of pages to be scanned before the KSM daemon sleeps.
   • sleep_millisecs indicates the sleep time (in milliseconds) of the kernel thread of the daemon after completing a scan.

   You can run echo xx > /sys/kernel/mm/ksm/$param to change the parameter value. In the command, xx indicates the new parameter value, and $param indicates the parameter to be adjusted.

2. Enable automatic full KSM deduplication for a container.

   echo 1 > /sys/fs/cgroup/memory/docker/CONTAINER_ID/memory.ksm

   CONTAINER_ID indicates the ID of the cloud phone container. Check whether the feature is enabled successfully.

   cat /sys/fs/cgroup/memory/docker/CONTAINER_ID/memory.ksm

   If the value of merge any tasks is not 0, the feature is enabled successfully.

3. Disable KSM deduplication.

   echo 0 > /sys/fs/cgroup/memory/docker/CONTAINER_ID/memory.ksm