Groups > alt.comp.os.windows-11 > #18465

Re: memory usage vs fan usage

From	Andy Burns <usenet@andyburns.uk>
Newsgroups	alt.comp.os.windows-11
Subject	Re: memory usage vs fan usage
Date	2025-04-17 19:57 +0100
Message-ID	<m6d183Fcl4lU3@mid.individual.net> (permalink)
References	<m6cgr0Fa4thU1@mid.individual.net> <vtr93h$10brs$1@dont-email.me>

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Paul wrote:

> Andy Burns wrote:
>>> I've always been a bit suspicious of the MemoryCompression
>> service, so I'm experimenting with it turned off for a bit. 
>> (powershell disable-mmagent -mc)
> 
> Makes sense, but the first question you have to ask, is why
> the Memory Compressor is sucking cycles, on machines which
> are not down to their last byte of memory.
> 
> On W10, between 250MB in use all the way up to 1GB in use,
> the compressor goes from "railed" at the how end, to barely
> doing anything at all on a machine equipped with 1GB of RAM.
> I did some tests in a VM, to see how it behaves. This was
> back when the Memory Compressor was visible in Task Manager.
> 
> You have 16GB or 32GB, and the Memory Compressor should be
> taking a snooze in such a case. 

Is that its defined behaviour, or just what a normal person would hope 
it does?

> Only when the memory use is
> at 90-95%, should the compressor be picking up again.
> 
> On Linux, something called "swappiness" defines some of
> the memory management behavior. Linux distros, some of
> them start to swap at half full, others allow the OS
> to get within 50MB of exhaustion, before doing
> something about it. Does Windows perhaps have a similar
> policy ?

Yes, I'm aware of that "dial"

> I used Process Explorer to watch the Memory Compressor, then
> ran my malloc64.exe test program (home-brew code), and the
> Memory Compressor only started to consume cycles near the
> very end of the run. There was no sign of any changed
> behavior that would account for your memory compressor
> to be running. When you're down to 250MB of memory left,
> you should start to see a response.

I know it doesn't fully hide from taskmgr or procexp, but why does it 
have to hide what it's doing from them?  I mean it must have a .exe or 
.dll somewhere, how much CPU usage does it do behind a curtain?

Thread

memory usage vs fan usage Andy Burns <usenet@andyburns.uk> - 2025-04-17 15:16 +0100
  Re: memory usage vs fan usage Paul <nospam@needed.invalid> - 2025-04-17 12:09 -0400
    Re: memory usage vs fan usage Andy Burns <usenet@andyburns.uk> - 2025-04-17 19:57 +0100
      Re: memory usage vs fan usage Paul <nospam@needed.invalid> - 2025-04-18 03:15 -0400
  Re: memory usage vs fan usage VanguardLH <V@nguard.LH> - 2025-04-17 11:59 -0500
    Re: memory usage vs fan usage Andy Burns <usenet@andyburns.uk> - 2025-04-17 19:40 +0100
      Re: memory usage vs fan usage Frank Slootweg <this@ddress.is.invalid> - 2025-04-19 12:04 +0000
        Re: memory usage vs fan usage Andy Burns <usenet@andyburns.uk> - 2025-04-19 13:36 +0100
          Re: memory usage vs fan usage Paul <nospam@needed.invalid> - 2025-04-19 09:25 -0400
          Re: memory usage vs fan usage Frank Slootweg <this@ddress.is.invalid> - 2025-04-19 14:54 +0000
            Re: memory usage vs fan usage Andy Burns <usenet@andyburns.uk> - 2025-04-19 16:16 +0100
            Re: memory usage vs fan usage Andy Burns <usenet@andyburns.uk> - 2025-04-24 08:17 +0100
              Re: memory usage vs fan usage VanguardLH <V@nguard.LH> - 2025-04-24 05:14 -0500
                Re: memory usage vs fan usage Andy Burns <usenet@andyburns.uk> - 2025-04-24 11:30 +0100
                Re: memory usage vs fan usage Paul <nospam@needed.invalid> - 2025-04-24 09:08 -0400
                Re: memory usage vs fan usage VanguardLH <V@nguard.LH> - 2025-04-24 20:59 -0500
                Re: memory usage vs fan usage Andy Burns <usenet@andyburns.uk> - 2025-04-25 07:40 +0100
                Re: memory usage vs fan usage Andy Burns <usenet@andyburns.uk> - 2025-04-25 19:13 +0100
                Re: memory usage vs fan usage VanguardLH <V@nguard.LH> - 2025-04-25 22:29 -0500
                Re: memory usage vs fan usage Andy Burns <usenet@andyburns.uk> - 2025-04-26 10:31 +0100
                Re: memory usage vs fan usage VanguardLH <V@nguard.LH> - 2025-04-26 15:05 -0500
        Re: memory usage vs fan usage "Carlos E.R." <robin_listas@es.invalid> - 2025-04-19 14:36 +0200
          Re: memory usage vs fan usage Andy Burns <usenet@andyburns.uk> - 2025-04-19 13:56 +0100
          Re: memory usage vs fan usage Paul <nospam@needed.invalid> - 2025-04-19 09:28 -0400
  Re: memory usage vs fan usage VanguardLH <V@nguard.LH> - 2025-04-17 15:07 -0500
    Re: memory usage vs fan usage "Carlos E.R." <robin_listas@es.invalid> - 2025-04-17 22:25 +0200
      Re: memory usage vs fan usage VanguardLH <V@nguard.LH> - 2025-04-17 19:30 -0500
        Re: memory usage vs fan usage "Carlos E.R." <robin_listas@es.invalid> - 2025-04-18 14:09 +0200
          Re: memory usage vs fan usage VanguardLH <V@nguard.LH> - 2025-04-18 11:13 -0500
            Re: memory usage vs fan usage "Carlos E.R." <robin_listas@es.invalid> - 2025-04-18 21:33 +0200
    Re: memory usage vs fan usage Andy Burns <usenet@andyburns.uk> - 2025-04-17 22:12 +0100
      Re: memory usage vs fan usage VanguardLH <V@nguard.LH> - 2025-04-17 20:07 -0500
      Re: memory usage vs fan usage Paul <nospam@needed.invalid> - 2025-04-18 05:24 -0400
        Re: memory usage vs fan usage Andy Burns <usenet@andyburns.uk> - 2025-04-18 12:08 +0100
          Re: memory usage vs fan usage Frank Slootweg <this@ddress.is.invalid> - 2025-04-18 18:09 +0000
            Re: memory usage vs fan usage Andy Burns <usenet@andyburns.uk> - 2025-04-18 19:36 +0100
  Re: memory usage vs fan usage "Carlos E.R." <robin_listas@es.invalid> - 2025-04-17 22:29 +0200
    Re: memory usage vs fan usage Andy Burns <usenet@andyburns.uk> - 2025-04-17 22:17 +0100
      Re: memory usage vs fan usage "Carlos E.R." <robin_listas@es.invalid> - 2025-04-18 02:19 +0200
      Re: memory usage vs fan usage Paul <nospam@needed.invalid> - 2025-04-18 05:52 -0400

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