Segmented, Paged and Virtual Memory

[@Liam-bp2rm]

He speaks so passionately and eloquently. He was born to be an educator.

[@sergioloo_]

He speaks like Mr Bean.

[@lukaassaf3894]

no

[@anirudhsrinivasaraghavan9561]

ya bro i aslo agree tis guy good explaning

[@Nibbles.]

the meat riding is crazy bro but yeah clear and concise.

[@danielmcleod6535]

Lifesaver. Was trying to understand this from my lecturer for far too long, this saved me hours. Great concise explanation.

[@ComputerScienceLessons]

Thank you. I'm glad to be of service :)KD

[@lukaassaf3894]

@@ComputerScienceLessons cap

[@lukaassaf3894]

@@ComputerScienceLessons liked the video tho :(

[@MyStockz]

Last time I saw this video was 3 years ago. Whenever I want to refresh my paged/segmented/virtual memory knowledge, I skip all other videos on it and come straight to this. 0% bullshit 100% to the point/visualized explanation

[@ComputerScienceLessons]

Thank you. Welcome back :)KD

[@MyStockz]

@@ComputerScienceLessons Thank you for the warm welcome ^_^

[@daveamiana778]

Saved me 2 hours of rewatching my lecture on this. Thank you for such great content.

[@ComputerScienceLessons]

Glad to help :)KD

[@alizein5107]

my teacher just said: paging is dividing the memory into equal spaces.. and then i had to figure out what happens from this amazing vid... it's really fun when you understand how it works not just telling me stuff to memorize like a memory card

[@ComputerScienceLessons]

I agree - you need to known WHY in order to appreciate something. :)KD

[@chris7056]

your videos are a gem! thank you for this. i am going to be going through them over break - UCSD student here.

[@ComputerScienceLessons]

Thanks for the lovely comment.

[@hepbitkin9854]

That is the best video I have ever seen on the internet about segmentation, paging and swapping operations. Explaining all the concepts on the same video allows us to understand the whole concept of memory management. Thank you so much for your help.

[@yorha.a2]

Thank you for this! I've read and watched several articles and videos but none of them were as detailed and easy to understand as this

[@ComputerScienceLessons]

Thank you :)KD

[@v380riMz]

I swear you're helping me to pass my exam this friday.. First the negative binary addition and now paging. Thanks alot

[@ComputerScienceLessons]

You are most welcome. Keep up the good work, and the best of luck to you :)KD

[@celsiusfahrenheit1176]

you should be the only one teaching this, most eveyone else in billions of google searches could not clearly explain the difference between logical, physicla and virtual memory, i was very confused betweeen logical and virtual, now with one image I totally get it.

[@ComputerScienceLessons]

It's actually a really simple idea isn't it? Thanks for the comment, it's much appreciated. :)KD

[@taubenangriff]

exam in 2 days, crunching learning hard. what a great video to get into the basics fast.

[@ComputerScienceLessons]

Delighted to help. Good luck. :)KD

[@anthonyvaccaro2681]

You have such an amazing ability to simplify complex topics. Thank you

[@hongkyulee9724]

Very clear and concise! Thank you for the good explanation!

[@NeaRaRiver]

1. You sound like Daniel from the game Amnesia : The dark descent. 2. Awesome. Hours of reading in 7 minutes... Why I just cant understand why cant people explain something easily with examples like this, we would have conquered all planets by now with educators like you. I start to think that we make things sound difficult on purpose... Thank you!

[@intuitiveclass6401]

I wish my professor spoke about these topics as concise as you do, thank you

[@ComputerScienceLessons]

You're very welcome :)KD

[@vephovandenberg3181]

Currently, I am learning how do operating systems work. This video is super helpful. Thank you so much.

[@ComputerScienceLessons]

You're very welcome. :)KD

[@thop7964]

I needed a refresher on segmented vs paged memory, and this was fantastic and concise. Wish this video was around when I learned about it the first time lol

[@ComputerScienceLessons]

Thank you. Glad to help. :)KD

[@raz0229]

Couldn't wrap my head around with fragmentation and paging by MMU from the book, watched this video and went through the chapter again. Excellent explanation mate 👍

[@ComputerScienceLessons]

Delighted to help :)KD

[@akhileshbhalerao6908]

It's been a long time i wasn't clear with the concept and after watching this video and many more videos of yours in this playlist.. All became crystal clear.. Thanks a lot.. 👍🏻

[@ComputerScienceLessons]

You are welcome :)KD

[@williamjayaraj2244]

Thank you for this lesson on memory allocation in computers. Easy to understand.

[@ComputerScienceLessons]

You're welcome :)KD

[@oliverbeck6839]

such a great voice, tone with a clear explanation, awesome...

[@enchhuang3273]

Thank you for this amazing video, I've spent the whole day today trying to understand my lectures, this helped clear things up so much!

[@ComputerScienceLessons]

You are most welcome :)KD

[@HuynhCongToaiK18HCM]

Thank you!!! Cannot understand this without you

[@teetanrobotics5363]

Best video on KZbin.

[@heinzotto1194]

Clear and concise! This is great, thank you.

[@solutions-ai]

The 10 dislikes must be from my uni lecturers :)

[@ComputerScienceLessons]

No doubt! :)KD

[@kosmasraptis8374]

Personally I'm trying to make an operating system as a hobby and I randomly came across this so I watched it. Great explanation, I subbed

[@ComputerScienceLessons]

Thank you. If you're the next Bill Gates or Steve Jobs, remember me :)KD

[@kosmasraptis8374]

@@ComputerScienceLessons I sure will, my friend

[@emperor8716]

Have an exam tmr and still haven't learnt this. I'm not stressing though because I know you won't disappoint :)

[@ComputerScienceLessons]

Good luck :)KD

[@andrewgreen1970]

Stellar video. Clear and concise. Thank you.

[@ComputerScienceLessons]

Thank you :)KD

[@fatihersoy7559]

another subtle, concise and golden one.

[@sylvestertweetyhunter1733]

Helped me a lot with my exam. Thank you so much👍

[@ComputerScienceLessons]

You are most welcome. Delighted to help :)KD

[@fluorescent_axolotl]

Beautifully done! I wish you were my professor.

[@ComputerScienceLessons]

Thank you so much :)KD

[@estherwahnon3638]

WOW. Incredible video , this helped me understood the material in such a small amount of time !!!! Highly recommended

[@estherwahnon3638]

This helped topple to understand ***

[@ComputerScienceLessons]

You are very welcome :)KD

[@ComputerScienceLessons]

:)KD

[@unity3dconcepts434]

love your videos... :-D . your voice + tempo makes it more interesting

[@ComputerScienceLessons]

Thanks for the lovely comment :)KD

[@Liam-bp2rm]

I am about to finish my second-to-last semester in my CS BA degree and just today found out there is a channel called computer science

[@timgorman807]

This makes a lot more sense, brilliant.

[@ComputerScienceLessons]

Glad to help :)KD

[@Alex-fo7jc]

Your explanation is the best! Thanks!

[@ComputerScienceLessons]

Thanks for saying so :)KD

[@zerubabeljember9387]

Thank you so much for making such amazing and clear lesson

[@ComputerScienceLessons]

You are most welcome. Thanks for the lovely comment:)KD

[@mwtiktok7552]

this was the best explanation! thank you so much!!!

[@saudgl]

What a perfect explanation really good job

[@linyidai9076]

thank you my friend, you helped my midterm :)

[@lamalamalamalamapapa]

what an excellent explanation!! thanks a lot!!

[@ComputerScienceLessons]

Thank you. You are most welcome :)KD

[@mohammadahmedragab837]

amazing concise information on memory management 💙💙💙

[@ComputerScienceLessons]

Thank you :)KD

[@kanashimi6209]

Thank you for all the great content you put out! Keep up the good work

[@ComputerScienceLessons]

You are most welcome. More on the way :)KD

[@mr.t877]

This was one of the best videos on this topic I found. THANK YOU SO MUCH. btw I like British English. :-)

[@ComputerScienceLessons]

Delighted to help. Thanks for the lovely comment :)KD

[@friction5001]

This is mouth watery content

[@ComputerScienceLessons]

I've never heard it called that. Thank you :)KD

[@Got-it747]

My God, give this guy 1k more likes 🙏

[@fddon4166]

flawless explanation!

[@jirihorak2924]

Not exactly. The segmented memory can be also virtualized. The video shows it in a way segments must follow each other, even though it is usually the same as with pages, the only difference is external fragmentation and internal fragmentation (=unused space in a segment) problem at once with segments (tries to balance both types out) or internal fragmentation only with pages.

[@PhenChua]

Beautiful presentation

[@ComputerScienceLessons]

Thank you very much :)KD

[@大盗江南]

the voice in IT is so unique

[@wonderbuddy3204]

thank you so much for this, you have no idea how much you have helped me through!

[@ComputerScienceLessons]

My pleasure :)KD

[@jebalimazen1809]

I got nothing to say, you nailed it

[@ComputerScienceLessons]

Thank you :)KD

[@searchforwardlimited8657]

This is exactly what I need.

[@diogomeneses48]

Very good articulation, please keep up!

[@yeadatwunyt8004]

wonderful presentation

[@ComputerScienceLessons]

Thank you :)KD

[@mk9834]

very clear and helpful presentation! thanks

[@bextract0]

Fantastic resource.

[@ComputerScienceLessons]

Thank you :)KD

[@moarz__1888]

This is insanely helpful

[@ComputerScienceLessons]

Glas to help :)KD

[@vamosabv]

Thanks for a very nice explanation with helpful diagrams!

[@satyaprakash5503]

Please make a video on "Virtual segmented systems" . Thank you

[@binhtong570]

Thank you! Your video is very informative.

[@com0oan]

Amazing presentation!

[@giorgosK936]

why is your voice so perfect?

[@oviya.n1317]

This got me with a good revision ❤️

[@ComputerScienceLessons]

Delighted to help :)KD

[@charlesc2064]

Thank you!! Super easy to understand, loved it

[@ComputerScienceLessons]

You are welcome. Thanks for the comment :) KD

[@aislinnlimbird8114]

Watching before my masters exam tomorrow :)

[@ComputerScienceLessons]

The very best of luck to you :)KD

[@omarghoche1828]

thank you for the explanation!

[@ComputerScienceLessons]

You're most welcome :)KD

[@indigod3323]

You are the best!

[@ComputerScienceLessons]

You're too kind. Thank you :)KD

[@hughe29]

Brilliant work. Thank you.

[@swedishguyonyoutube4684]

YES! I LOVE these vids!

[@ComputerScienceLessons]

:) :) :) KD TY

[@saudaljaloud5953]

best video ever 👍👍👍

[@jojorose375]

Thank you, it was an understandable lecture. .

[@אביעדבגנו]

Very clear, thank you!

[@ComputerScienceLessons]

Thank you :)KD

[@chenchang-zr5rb]

great video❤

[@ComputerScienceLessons]

Thank you :)KD

[@someone3706]

Your video is great, thank you. But I do not understand what does logical memory store? I mean, the logical memory part is not so clear. Sorry for the criticism.

[@ComputerScienceLessons]

logical memory is not real!!! The operating system (E.G. Windows) fools each program into thinking it is the only thing running on the computer. It fools each program into thinking it has all of the memory to itself. Logical memory is one program's view of the memory - it is how an individual program sees the memory. Physical memory on the other hand is what is really going on - that is, lots of different programs sharing the memory (oblivious of each other). :)KD

[@someone3706]

@@ComputerScienceLessons :))) Thank you it is now clear. Keep doing such kinds of videos.

[@lucarauchenberger628]

wow just wow! soooo helpful! thank you

[@ComputerScienceLessons]

Glad it was helpful. :)KD

[@subodhvashistha676]

Crisp and clear

[@ed1849x]

Thank you!

[@ComputerScienceLessons]

You're welcome :)KD

[@ggeuk__5244]

This helped alotttt thankyou

[@ComputerScienceLessons]

Delighted to help :)KD

[@yousefmousa9796]

Gold thanks !

[@adamrizk6735]

Awesome video, only thing I don’t understand is how can a single page store memory for two processes? Does the page table keep track of which addresses within each page belongs to which process?

[@avirajpatil630]

Thank you Sir

[@ComputerScienceLessons]

You're welcome :)KD

[@filipsiroky4439]

thank you! really well explained

[@tomasfojt3381]

FI MUNI statnice? :D

[@benyaminyakobi3652]

Thank you very much, clear explanation :)))

[@ComputerScienceLessons]

You are welcome :)KD

[@nates9778]

Would there be a disadvantage for having a higher page size, 1gb for instance.

[@ComputerScienceLessons]

It takes longer to swap large amounts of data in an out. You might also swap out some smaller programs and data unnecessarily, then need them again immediately. There's definitely a balancing act to be performed here. For windows based computers, someone decided 4KB was optimal :)KD

[@simatbirch]

Excellent - subbed!

[@ComputerScienceLessons]

Welcome aboard! :)KD

[@Jay_0605]

Nice

[@ComputerScienceLessons]

Thanks

[@calvin_713]

THanks!

[@ComputerScienceLessons]

You're welcome :)KD

[@sto2779]

Where is the "page table" itself actually located, in memory or hard disk?

[@vojtamaximus5291]

During the execution time of a process, it is in main memory, for sure. It is part of a Process Control Block data structure, also called program descriptor, which contains all the info about a process.

[@juancamilogomezrave6097]

This is a good information, and what about all Linux based systems?

[@ComputerScienceLessons]

One day, I hope to cover Linux.

[@gtb7878]

thanks :) very good to understand

[@ComputerScienceLessons]

You are welcome :)KD

[@yahyarechaki9908]

Thanks Here , 6:04 youre talking about the logical adress (logical memory) ? The logical memory is not necessary contiguous ?

[@ComputerScienceLessons]

Logical memory is smoke and mirrors! It is simply the way one program sees the memory. Each program is made to believe that it is the only thing running on the computer, and that it has all of the memory to itself. (thanks to the operating system). :)KD

[@ShivaSpaceStation]

Wow, lifesaver

[@swaminathbera6407]

Segmentation is another non-contiguous memory allocation scheme like paging

[@Crazygon1998]

Thank you very much!

[@caseyspaulding]

thanks

[@ComputerScienceLessons]

You're welcome :)KD

[@TakundaKondongwe]

💯💯

[@ComputerScienceLessons]

Thank you :)KD

[@paurushgargtube]

Lifesaver.

[@KabelkowyJoe]

BUT in order to work CPU must have access must be provided to page list where each currently running process is loaded to translate adresses, 368 support this, 286 only segmented, 88/86 none only real mode, page size, segment size is defined in hardware

[@manuelavendano3891]

Didn't know National Geographic´s speaker liked computers

[@ComputerScienceLessons]

Perhaps they'll offer me a job one day :)KD