Subject: Resource Throttling
From: "--[ UxBoD ]--" <uxbod@splatnix.net>
Date: Thu, 20 May 2010 14:01:04 +0100 (BST)

Hello all,

Slowly getting to grips with VServer though have a question over resource sharing. 
We have a server with 8 CPUs and 32GB RAM; and 20 contexts running.  The nature of each
context is a virtual desktop and recently have experienced a problem where one context
has consumed a high amount of CPU and memory.

I have read the documentation on context rlimits though am a little confused on how
best to set the fill and interval rates.  My aim is not to impede our desktops, and
allow bursting when required, but I wish to stop runaway processes from bringing down
the other contexts.

The initial thoughts are that we should set each context to sched_prio and for the limits
use:

fill-rate  : 3
interval   : 10
max-tokens : 5000
min-tokens : 1000

How do you these values sound ?

I see how the values are updated in /proc/virtual/<CTX>/sched though is there any easy
way to keep a running track of how many tokens are being consumed by each context ?

Looking forward to any responses.
-- 
Thanks, Phil