Messages in this thread | | | Date | Tue, 21 Mar 2000 14:41:05 -0600 (CST) | From | Jesse Pollard <> | Subject | Re: Overcommitable memory?? |
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Horst von Brand <vonbrand@pincoya.inf.utfsm.cl>: > David Whysong <dwhysong@physics.ucsb.edu> said: > > [...] > > > Preventing system OOM using resource limits is equivalent to disabling > > overcommit. You have to restrict each of N users to 1/N of the total > > system memory. > > So you have 500 accounts, each one gets to use 1/500th of the (be very > generous!) 2Gb VM. What if a batch of 50 new accounts shows up? Everybody > gets the quota cut down 10%?
I believe the "N" referrs to N concurrent users.
> There are usually 10 active accounts, each one gets 200Mb. What if the 11th > logs in? Start killing off processes of the people that were using exactly > their share of the memory ATM?
The 11th gets an "insufficient resourcess currently available for login" message.
> Resource limits per user are orthogonal to overcommit. You could very well > limit Jane Random User to 300Mb, as long as the system is able to provide > it. You can overcommit or not, but in no case can Jane use more than her > limit.
------------------------------------------------------------------------- Jesse I Pollard, II Email: pollard@navo.hpc.mil
Any opinions expressed are solely my own.
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