Maximum value for "Disk queue size"?

[Obegg]

I would like to know the maximum value I can set Disk queue size, I've tried to use 3000000 (3GB) and it resets it 1 KiB.

[luzpaz]

Can you please always remember to add you full about info ? TIA

[Obegg]

Sorry about it, my bad.
Using: Windows x64 (lt20 qt6) 4.5.5
Qt: 6.4.3
Libtorrent: 2.0.9.0
Boost: 1.83.0
OpenSSL: 1.1.1v
zlib: 1.2.13

[thalieht]

I would like to know the maximum value I can set Disk queue size

qBittorrent/src/gui/advancedsettings.cpp

Line 549 in 30badbf

m_spinBoxDiskQueueSize.setMaximum(std::numeric_limits<int>::max() / 1024);

2147483647 / 1024 = 2097151 KiB = ~2 GiB

[Obegg]

Thank you!
I can't say I understand why, but I just wanted to say that I have enough RAM (more than 2GB) than I would like to use, is it not possible?

[thalieht]

max_queued_disk_bytes is of type int in libtorrent and this counter is measured in bytes there. The maximum value of a 32 bit integer is2147483647 so this is the biggest possible value libtorrent accepts for this setting before it overflows. Data type is the only limitation.
In the end you may be overthinking it... the default is 1 MiB so 2 GiB may be exorbitantly high and unnecessary. If that size or higher was beneficial, libtorrent would use a different data type. Maybe it is beneficial... but someone would have to prove it first.

[Obegg]

Well, the reason I was asking about the maximum value of "disk queue size" is because one (one out of 5) of my hard drive is slow (I've yet to figure out why, but seems to be caused by qbit), and I rather "waste" (you may call it that way) 5 or 10 or 20GB that it will download to RAM and then will write to disk, so I guess that's the proof you wanted?
I have enough RAM installed, so from my point of view - If have 256GB (example) I want to use 256GB.