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2.  JVM Memory is split into 3 components
 Why 2 survivor spaces?
 Garbage Collection Algorithms

4.  Java may be a general purpose object-oriented platform-
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5.  JVM Memory is split into 3 components
 Young generation
 Old generation
 Metaspace (Perm Gen)
 the name suggests, young generation is that the space wherever
fresh created objects square measure allotted.
 When young generation fills up, it cause minor garbage pickup
aka Minor GHz.

6.  When minor Gcs happens, dead objects are going to be faraway
from young generation.
 If you've got heap of dead objects in young generation, Minor
GHz are going to be perfomed quicker.
 All minor GCs square measure “stop the world” events,
therefore once minor GCs happens, application threads also will
stop.

7.  Let’s perceive a lot of regarding however objects square measure
allotted in Young generation.
 Young generation is split into three components.
 Eden house
 Survivor house S0
 Survivor house S1
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8.  All fresh created objects square measure allotted in eden
house.
 When Eden house is totally crammed with objects then
minor GHz can occur. All the objects that don't seem to be
dead or unreferenced are going to be rapt to at least one
of the survivors areas. In our case, let’s say all the objects
square measure rapt to S0.
 Old generation
 It is employed to carry previous long living objects
 It is mostly larger than the young generation.
 When irremovable house is totally filled(or predefined
threshold) with objects then Major GHz can occur. it'll
reclaim the memory and liberate house.

9.  Often, Major GHzs square measure slower and fewer
frequent than minor GC.
 How are you able to use this data to optimize memory?
 It depends on nature of application.
 If you've got temporary objects then there'll be lot of
minor GHz. you'll be able to offer arguments
XX:NewRatio=1 to distribute five hundredth to young
generation and five hundredth to previous.

10.  By default, NewRatio=2 thence young Generation is 1/3 of total
heap.
 Similarly, If you've got too several lasting objects, then you would
possibly have to be compelled to increase size of tenure house by
golf shot high price of NewRatio.

11.  Why 2 survivor spaces?
 You must be questioning why will we have a pair of survivor house.
we've got a pair of survivor areas to avoid memory fragmentation.
whenever you copy objects from eden to survivor and you get empty
eden house and one empty survivor house.
 Garbage Collection Algorithms
 JVM comes with many algorithms for young and previous generation.
There square measure three kinds of algorithms

12.  serial collector
 It uses single thread to perform all the rubbish assortment and is
appropriate for basic application with single processor machines.
 Last updated : July sixteenth, 2019
 Garbage Collection in java
 In this post, we'll see regarding garbage pickup in java.

13.  I will try and make a case for with the assistance of
diagrams and examples instead of theory.
 JVM Memory is split into 3 components
 Young generation
 Old generation
 Metaspace (Perm Gen)

14.  When Eden house is totally crammed with objects then minor GHz
can occur. All the objects that don't seem to be dead or
unreferenced are going to be rapt to at least one of the survivors
areas. In our case, let’s say all the objects square measure rapt to
S0.
 When Eden house is crammed once more, then all the live
objects in Eden house andSurvivor house S0 are going to be rapt to
Survivor house S1.