Understanding JVM Memory, Heap, Garbage Collection and Monitoring the JVM | Tech Primers

This video covers Understanding JVM Memory, Heap, Garbage Collection and Monitoring the JVM using JVisual VM.

Video Editing: iMovie

Background Music: Fredji
Joakim Karud

[rameshlanka]

Wow informative is so clear I understood a lot. Thank you

[santosh]

Did not know about the JVisual VM. Learnt it today. Informative. Thanks.

[techvideos]

My understanding might be wrong here. At 7.25 you say the object reference is stored in the heap. But does the object reference gets stored in the heap or is it the object(instance) that gets stored in the heap? Because as far as I know object reference indicates the reference variable and that is stored in stack (again I might be wrong here).
Would like to get your view here

[davie-ongh]

I love all your tech videos.. short and full of great info

[anupjuly]

Can you share video where you are debugging a memory leak issue on prod. we are facing mem leak issue on API running on server, No idea how to start debug it go get the reason.

[GodOfGizmos]

Hi Ajaykumar, This video was very helpful. Thank you.
I have 2 suggestions for this video.
1. Divide this video by adding chapters
2. When you were trying to explain Heap & Stack, I could not follow. I would request you to have cursor movement around it while explaining the flows/diagrams.

[sbnighut]

At 8:32, "Age" was called not primitive, whereas it is a primitive type variable and hence placed in the stack.

[balkrishnatalke]

Very Great video, Nicely explained the JAVA Memory Model, Thanks for this video ...

[pallavikashyap]

Can you please help me in knowing which will be the best command to get to know about the heap space covered by a process in server

[dineshchandgr]

hi i have a doubt with Tomcat Thread Pool vs Executor thread pool. If tomcat server thread pool is 200 and we set executor thread pool to 10, do we have 210 threads in total?

[basavaraj]

where is STACK memory in the components diagram ?

[thuglakcho]

Thanks man..very informative and concise..i wish it had closed captions turned on

[mihir]

Hey great video could you demonstrate memory leak and fix it onna basic level?!!? Thanks in advance

[vinayh.m.]

Hi, this i my first comment and have been following your videos for some time. All videos are quite useful and I like the fact that you keep posting videos on latest trending technologies in the market. I highly appreciate your efforts behind these videos in collecting and well presenting in a compact and nice way. Keep up the good work. Btw, you may want to upload some video related to how class loading works in detail and errors that most programmers run into wrt class loading, conflicts, versioning issues, etc

[anupsingh-guph]

can you upload a video having how to manage the memory with a real life example. let suppose you are facing some memory issue, or how to manage performance issue. -thanks

[nagavadlapudi]

Surprisingly confusion started when you showed an example at 7:03
No one gave this sort of example, but it's very confusing as you are not pointing anything while explaining, I found it very hard to follow and lost interest to move further.

[firozpasha]

Where are jre and application classes loaded, metspace and permgen respectively ??

[alexeystaroverov]

hmm, isn't The Java memory model describes "how threads in the Java programming language interact through memory" rather then "Understanding JVM Memory, Heap, Garbage Collection and Monitoring the JVM" ???
I'm surprised...

[xh]

Hi could you do a video on low lantency java programming with microservice design pattern? Would be good if you could show a simple example!

[AshishAshish-fppo]

Wrong ... About Heap ... Heap will never contains static data as you said,

This is true.
Method area section was used to store static variables of the class, metadata of the class, etc. Whereas, non-static methods and variables were stored in the heap memory.