What does -Xmn jvm option stands for

Question

I tried searching the internet about -Xmn option  without success   Can someone please explain what this stands for and how can I use it to tune JVM

User · Answer

From GC Performance Tuning training documents of Oracle:

-Xmn[size]: Size of young generation heap space.

Applications with emphasis on performance tend to use -Xmn to size the young generation, because it combines the use of -XX:MaxNewSize and -XX:NewSize and almost always explicitly sets -XX:PermSize and -XX:MaxPermSize to the same value.

In short, it sets the NewSize and MaxNewSize values of New generation to the same value.

User · Answer

From here   -Xmn   the size of the heap for the young generation Young generation represents all the objects which have a short life of time  Young generation objects are in a specific location into the heap  where the garbage collector will pass often  All new objects are created into the young generation region  called  quot eden quot    When an object survive is still  quot alive quot  after more than 2-3 gc cleaning  then it will be swap has an  quot old generation quot    they are  quot survivor quot    And a more  quot official quot  source from IBM   -Xmn Sets the initial and maximum size of the new  nursery  heap to the specified value when using -Xgcpolicy gencon  Equivalent to setting both -Xmns and -Xmnx  If you set either -Xmns or -Xmnx  you cannot set -Xmn  If you attempt to set -Xmn with either -Xmns or -Xmnx  the VM will not start  returning an error  By default  -Xmn is selected internally according to your system s capability  You can use the -verbose sizes option to find out the values that the VM is currently using

User · Answer

-Xmn   the size of the heap for the young generation   Young generation represents all the objects which have a short life of time  Young generation objects are in a specific location into the heap  where the garbage collector will pass often  All new objects are created into the young generation region  called  eden    When an object survive is still  alive  after more than 2-3 gc cleaning  then it will be swap has an  old generation    they are  survivor         Good size is 33    Source

[java] What does -Xmn jvm option stands for

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