OpenVZ Forum


Home » Mailing lists » Users » Ballpark resource requirement for debian apt-get
Ballpark resource requirement for debian apt-get [message #24425] Wed, 05 December 2007 06:20 Go to next message
jarcher is currently offline  jarcher
Messages: 91
Registered: August 2006
Location: Smithfield, Rhode Island
Member
From: openvz.org
Hi All...

I have reviewed the docs concerning user_beancounters and resource 
allocation.  It was my plan to have a bunch of very light VPSs doing 
certain things.  I have noticed that Debian Etch runs nicely under OpenVZ 
and I have a bunch of VPSs running it, but apt-get seems to need an awful 
lot of kernel memory.

Has anyone else noticed this?  What settings do you use when you need to 
run apt-get?

Thanks...
Re: Ballpark resource requirement for debian apt-get [message #24458 is a reply to message #24425] Wed, 05 December 2007 10:15 Go to previous messageGo to next message
vaverin is currently offline  vaverin
Messages: 682
Registered: September 2005
Senior Member
From: *sw.ru
Hi Jim,

/proc/ub/<VEID>/kmem_debug shows more detailed statistic about objected charged to kmemsize. I hope it will help You to understand why have resources shortage when it starts apt-get.

However anyway you will need to increase kmemsize limits -- at least I do not see any ways to exclude it.

Thank you,
Vasily Averin
Re: Re: Ballpark resource requirement for debian apt-get [message #24525 is a reply to message #24458] Wed, 05 December 2007 21:36 Go to previous messageGo to next message
jarcher is currently offline  jarcher
Messages: 91
Registered: August 2006
Location: Smithfield, Rhode Island
Member
From: openvz.org
Thanks Vasily...

I have increased the kmemsize limit, as that was the only way to resolve 
the issue.  It surprises me that apt-get needs more resources than many of 
the other apps I run.  How much of a negative impactdoes increasing 
kmemsize have on the rest of the system?  I run AMD64 Etch, but it kmemsize 
still a limited resource?



--On Wednesday, December 05, 2007 1:15 PM +0300 vaverin <vvs@sw.ru> wrote:

>
>
> Hi Jim,
>
> /proc/ub/<VEID>/kmem_debug shows more detailed statistic about objected
> charged to kmemsize. I hope it will help You to understand why have
> resources shortage when it starts apt-get.
>
> However anyway you will need to increase kmemsize limits -- at least I do
> not see any ways to exclude it.
>
> Thank you,
> Vasily Averin
Re: Re: Ballpark resource requirement for debian apt-get [message #24542 is a reply to message #24525] Thu, 06 December 2007 06:51 Go to previous message
vaverin is currently offline  vaverin
Messages: 682
Registered: September 2005
Senior Member
From: *sw.ru
Hi Jim,

kmem_debug output can clarify this situation.
I expect it happens because apt-get open many files. Each open files and directories eats kmemsize for disk-related structures.

For x86_64 kernels sum of all VE's kmemsize and allsoketbufs limits should not be greather than 40% RAM on your node.
You can find some more details about UBC configuration in our Wiki:
http://wiki.openvz.org/UBC_systemwide_configuration.

thank you,
Vasily Averin
Previous Topic: Unable to talk to outside networks.
Next Topic: vzdump to restore to a specific location
Goto Forum:
  


Current Time: Tue Dec 11 20:22:53 GMT 2018