Memory flush not working IOS 13.1.2 iPad Air 10.5

supadom

Sorry about opening a new thread just for this but trying to get as many opinions/experiences as possible.

So I’ve tried to do the usual long press on start until ‘slide to off’ and then the long press on home button but instead of getting flashed back to home screen it took me to password required page like the one we get when restarting (no Touch ID etc). So I’ve tried it several times with the same result.

Because of this I’ve run the system monitoring app that gave me ram hovering around 47%. So I’ve done a full restart and (surprise!) ram below 30%! Which (unless my science is wrong) will mean that the old trick no longer works in the latest IOS. Not great.

Having said that, I’ve never performed this test on iOS 12 so I don’t actually know for certain that that trick wasn’t just an old wive’s tale

supadom

Mmmm, interesting.

I’ve just done the same test on my iPad Pro 10.5 iOS 12.3.1 and had no change in ram after the so called ‘memory reset’. I’ve just restarted it and bang, memory down to 30%!!

Gravitas

I'm on iOS 13 myself.

Using Lithium Lite to access the memory capacity
it showed more memory after a memory flush and before a reset.

I reset my iPad and the memory on restart was down to half.
Also each time I accessed the app, leaving it in the background,
the memory went down by a few percent without doing anything else
other than placing the app in the background so either the app itself
once it accesses the memory functions leaves traces much similar
to the zombie IAA apps and/or iOS has memory problems in
the way it addresses memory allocation.

Considering that they've now changed the way memory is accessed
for Auv3 and parts of iOS are being deprecated or removed
I would say it's more of the latter.

iPad Pro 9.7' 1st gen here

zeropoint

Interesting. I’m using Lirum Lite. Flush works here but reboot clears more ram.

How much free ram should one be seeing on a 3GB device ? I’m a little surprised to see less than 1gb free straight after reboot.....

Gravitas

@zeropoint

Since I've been on iOS I have not been able to find a clear
description of what goes on with memory management.
It doesn't have system information to hand inbuilt
which normally gives the most reliable information as
seen on desktops.

My machine has 2Gb yet it only ever has 30% at max.
So what is happening to the rest of the memory?

zeropoint

@Gravitas thanks. do you mean 30% used or free ?

At boot, mine has approx 40% active, 20 % wired, 10% inactive and 30% free.

Gravitas

@zeropoint

30% free.

Gravitas

@zeropoint

Active 27.07 %
Wired 14.04 %
Inactive 19.64%
Free 39.26%

Closing the app and then running
the app again and free dropped to 27%.

Gravitas

A question?

When they say that iOS has xyz gigabytes of memory
is that the physical memory as in RAM or is that everything
combined such as onboard memory, page file etc, etc
because if so then memory at 30% would make a lot more sense.

supadom

I don’t know what reliable permissions it has but the System Status app gives me consistent readings of ram and cpu usage. The cpu isn’t my concern at all but even with 4gb ram on pro 10.5 it is still by far the most likely reason for things going wrong while playing music.

The more free ram the better of course, especially considering that the system itself will suck up over 1gb of what’s available. That means that just under 1gb is available on an air 2 for music apps which doesn’t seem much. On the up side I remember running similar set ups on my pro 10.5 (@128 frames) and air 2 (@256 frames)when I still had one and there wasn’t much between them in terms of performance so maybe there’s other factors that I’m not considering like screen size and number of pixels per inch.

Gravitas

There are four main deciding factors to performance when it comes to computers.

ROM and RAM System Memory
CPU
GPU
Storage and how that is accessed.

Some companies fudge their figures by having the System RAM and the GPU Ram
share memory and during usage it is upped using Virtual memory or page size.

Then comes coding.

Reaper on both MAC and PC clearly showed how much programming is phaf.

Then in comes the iOS programmers who have access to
limited memory space and app size and getting professional results.

I digress.

Clearing memory by software rather than
a reboot seems to leave more memory.
A total reboot gets rid of zombie apps
but will show less memory as
it does it's spring cleaning as it were.

What would be interesting is if we can actually
switch of functions that take up memory that we don't need
but then that's heading back into desktop territory.