Thread: Openvz container help re memory allocation?

Hi I hope someone can help me please..

I recently made a vps using openvz. All went well and I thought I had got it all set up but I am just failing at increasing the memory allocated to it

This is what I have tried:-

root@server:/var/lib/vz/template/cache# vzctl set 102 --physpages 1024 --save
UB limits were set successfully
Saved parameters for CT 102
root@server:/var/lib/vz/template/cache# vzctl restart 102
Restarting container
Stopping container ...
Container was stopped
Container is unmounted
Starting container ...
Container is mounted
Adding IP address(es): 184.82.xxx.xx
Setting CPU units: 1000
Set hostname: seed.mytest.org
File resolv.conf was modified
Container start in progress...
root@server:/var/lib/vz/template/cache# vzctl exec 102 free -m
total used free shared buffers cached
Mem: 256 81 174 0 0 0
-/+ buffers/cache: 81 174
Swap: 0 0 0
root@server:/var/lib/vz/template/cache#

As you can see the memory is still allocated as 256mb but I think there are other parameters I need to set regarding system resources?

I think if anyone who is reading this has a working knowledge of OpenVZ they will know what to do? Or maye even have a config file I can adapt?



Just so you know I installed a new user and ftpd on the container and assigned an ip no problem and I have tested this so its just the resources bit I am struggling with!

I have checked all the OpenVZ wiki but I find it very difficult to understand, I hope someone can help me

Not my area of expertise, but you should be able to allocate openVZ memory like so..
E.g. say you want to configure the first VE instance with 512 MB available for applications:

# RAM is 4k pages, so 131072*4k = 512M
vzctl set 1 --save --vmguarpages 131072
vzctl set 1 --save --oomguarpages 131072
vzctl set 1 --save --privvmpages 131072:196608


Or some releases, you may be able to use M or G (for MB or GB, respectively)

#to set privvmpages/oomguarpages/vmguarpages.
vzctl set $veid
--vmguarpages 512M:768M

This represents 512 MB available to apps (barrier) and 768 MB as a hard limit. Remember to not allocate 100% of your physical memory as available to VE resources or you will run into file paging, which isn't fun for anyone.

Wow thanks a lot Copper!

I don't know know you did it! Managing to understand all that lol! I really don't get why the developers of OpenVZ have to make it so complicated!

Well I did this:-

root@server:/var/lib/vz/template/cache# vzctl set 102 --save --vmguarpages 26214 4
UB limits were set successfully
Saved parameters for CT 102
root@server:/var/lib/vz/template/cache# vzctl set 102 --save --oomguarpages 2621 44
UB limits were set successfully
Saved parameters for CT 102
root@server:/var/lib/vz/template/cache# vzctl set 102 --save --privvmpages 26214 4:327680
UB limits were set successfully
Saved parameters for CT 102
root@server:/var/lib/vz/template/cache# vzctl restart 102 Restarting container
Stopping container ...
Container was stopped
Container is unmounted
Starting container ...
Container is mounted
Adding IP address(es): 184.82.xxx.xx
Setting CPU units: 1000
Set hostname: seed.mytest.org
File resolv.conf was modified
Container start in progress...
root@server:/var/lib/vz/template/cache# vzctl exec 102 free -m
total used free shared buffers cached
Mem: 1024 82 941 0 0 0
-/+ buffers/cache: 82 941
Swap: 0 0 0

I did this ^ ! And as you can see has done me proud! It truly is bizzarre that they wish you to allocate the memory is multiples of 4k's lol! But this seems to have worked perfectly, hehe :)

There looks like there is no paging file set but hopefully I won't run into it..