[SOLVED] KSM Sharing testing

[mspencerl87]

Hello, all. I started reading about KSM Sharing. I noticed that this should start working when 80% or so.
The majority of my CTs, and VMs are Ubuntu Based. So should all be sharing same base image.

Proxmox01 I (Not in screenshot) I spun up another VM on Ubuntu and got the memory utilization up to 90% and noticed KSM doesn't appear to do anything.
Proxmox02 I spun up 3 identical machines, with 18GB each, and loaded up the memory to use about 58GB total. KSM also did not appear to work.

Any Ideas?
Does Ballooning memory need to be used for this feature in the Linux Kernel to work?
Or am I missing something obvious.

Lol, do I just need to uncomment these lines for this to work?
KSM_THRES_COEF=20
KSM_THRES_CONST=2048

ksmtuned.conf
# Configuration file for ksmtuned.

# How long ksmtuned should sleep between tuning adjustments
# KSM_MONITOR_INTERVAL=60

# Millisecond sleep between ksm scans for 16Gb server.
# Smaller servers sleep more, bigger sleep less.
# KSM_SLEEP_MSEC=100

# KSM_NPAGES_BOOST=300
# KSM_NPAGES_DECAY=-50
# KSM_NPAGES_MIN=64
# KSM_NPAGES_MAX=1250

# KSM_THRES_COEF=20
# KSM_THRES_CONST=2048

# uncomment the following if you want ksmtuned debug info

# LOGFILE=/var/log/ksmtuned
# DEBUG=1

 

[aaron]

KSM will start working if the memory if full enough. 80% with the default COEFF=20. You can uncomment and set it higher in the config file. For example, set the COEFF to 50, as it will then start at 50% memory usage. A restart of the ksmtuned.service is necessary to apply the changes.

systemctl restart ksmtuned.service

 

[mspencerl87]

I Uncommented
KSM_MONITOR_INTERVAL=60
KSM_THRES_COEF=50 and restarted ksmtuned

already seeing
KSM sharing
2.39 MiB

Been using this install since 7.4, first time I've got this to work! Thanks

Should any other variables be edited?
# Configuration file for ksmtuned.

# How long ksmtuned should sleep between tuning adjustments
KSM_MONITOR_INTERVAL=60

# Millisecond sleep between ksm scans for 16Gb server.
# Smaller servers sleep more, bigger sleep less.
# KSM_SLEEP_MSEC=100

# KSM_NPAGES_BOOST=300
# KSM_NPAGES_DECAY=-50
# KSM_NPAGES_MIN=64
# KSM_NPAGES_MAX=1250

KSM_THRES_COEF=50
# KSM_THRES_CONST=2048

# uncomment the following if you want ksmtuned debug info

# LOGFILE=/var/log/ksmtuned
# DEBUG=1

Thanks!

 

[Dunuin]

You usually don't have to uncomment anything, unless you want something else than the default values.