[NCLUG] Testing memory pressure

[grant at amadensor.com]

Actually, that would work great.   I just want to use a lot of RAM without
having to write something complex, and without worrying that it will keep
spinning until the system dies. I could build a 7.5G ramfs on a machine
with only 8GB of RAM and the pressure will remain static.

Brilliant!  (and not in the paulaBean kind of way.)



> It's probably not quite what you're looking for, but you could mount a
> ramfs that eats up most of your memory.
>
> -Myles
>
> <insert fancy signature here>
>
> On Thu, Jan 13, 2011 at 8:23 AM,  <grant at amadensor.com> wrote:
>> I want to test how an application reacts to being starved for resources.
>>
>> I have some pretty good ideas about how to create an artificial I/O load
>> and a CPU load.   Does anyone have a good idea for how to (from
>> something
>> quick like shell or PERL) use a lot of memory so that things start to
>> swap
>> out?
>>
>>
>> I am trying to get real numbers about how different database plans
>> (hash,
>> loops, scans) react to different resource limitations.  I have seen it
>> over the years on different hardware, but I want real numbers for he
>> same
>> hardware when you have to share.
>>
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