Large system size on Note 5

[Markismus]

I ran out of space, cleaned all caches and found to my surprise that the System still used 18Gb. (See screenshot.)
Is this normal for Android 11 and should I start pruning the library or is this rather large? If large, how can I reduce it?

[Renate]

Originally Posted by Markismus

If large, how can I reduce it?

Lies, damned lies and statistics.
They don't make it easy to see what's going on.
My Poke3 has 7.1 GB "System", my Poke5 11 GB, my phone 16 GB.

Let's do some math.
My Poke5 has 31,331,450,880 bytes flash.
The userdata partition has 48,037,599 blocks.
That's 24,595,250,688 bytes where you can store books.
So, all the places you can't store books is 6,736,200,192 bytes.
My Poke5 has 76 non-userdata partitions that make up this 6.7 GB.
So how do we get from 6.7 GB to 11 GB?
Apparently they are counting 4.3 GB of system-related things stored in the userdata partition.
What? I dunno. Stuff like vendor, apex, odex, vdex...

[Markismus]

Hey, Renate.

Yes, I saw while wiping caches that the userdata-partition>android>data directory is used. It apparently. has data from apps, both from system and user installed apps.

However, it still has to add up to 64GB, doesn't it. Your Poke5 has 31,3 GB. So it does add up. Even though some data is placed on the userdata-partition.

After upgrading to 3.5.3 it has even grown to 17GB!

Aside: It has gotten quite ugly with the new icons. Is there a way to switch back?

BOOX:/ $ df
Filesystem       1K-blocks     Used Available Use% Mounted on
tmpfs              1857692     1240   1856452   1% /dev
tmpfs              1857692        0   1857692   0% /mnt
/dev/block/dm-13   2059384  2053212         0 100% /
/dev/block/dm-14    293860   292980         0 100% /system_ext
/dev/block/dm-15    493908   492408         0 100% /vendor
/dev/block/dm-16    567208   565488         0 100% /product
tmpfs              1857692        0   1857692   0% /apex
/dev/block/sda12     18928      464     17732   3% /onyxconfig
/dev/block/dm-17  52113212 45476540   6534992  88% /data
/data/media       52062012 45578220   6483792  88% /storage/emulated

Doesn't seem to count up to 64GB

BOOX:/ $ ls /dev/block
bootdevice  dm-9    loop3     ram1   ram5   sda13  sdb1  sde1   sde19  sde28  sde37  sde46  sde55  sdf2
by-name     loop0   loop4     ram10  ram6   sda2   sdb2  sde10  sde2   sde29  sde38  sde47  sde56  sdf3
dm-12       loop1   loop5     ram11  ram7   sda3   sdc   sde11  sde20  sde3   sde39  sde48  sde57  sdf4
dm-13       loop10  loop6     ram12  ram8   sda4   sdc1  sde12  sde21  sde30  sde4   sde49  sde58  sdf5
dm-14       loop11  loop7     ram13  ram9   sda5   sdc2  sde13  sde22  sde31  sde40  sde5   sde6   vold
dm-15       loop12  loop8     ram14  sda    sda6   sdd   sde14  sde23  sde32  sde41  sde50  sde7   zram0
dm-16       loop13  loop9     ram15  sda1   sda7   sdd1  sde15  sde24  sde33  sde42  sde51  sde8
dm-17       loop14  mapper    ram2   sda10  sda8   sdd2  sde16  sde25  sde34  sde43  sde52  sde9
dm-3        loop15  platform  ram3   sda11  sda9   sdd3  sde17  sde26  sde35  sde44  sde53  sdf
dm-6        loop2   ram0      ram4   sda12  sdb    sde   sde18  sde27  sde36  sde45  sde54  sdf1

But not all the dm-partitions are reported with df

[Renate]

That looks like ~10.6 GB in system partitions and 6.4 GB in userdata for 17 GB.
With A/B you've got a lot of inactive partitions that goes into that 10.6 GB.