If anyone could help me with this problem.
I was running the application on Windows 64 bits e it was working fine, but I changed the computer and now it's running on 32 bits.
This error could be about this or it is some configuration?
EDIT: Could not reserve enough space for object heap
Thanks
It is possible that your IntelliJ's available memory space is not large enough to allocate 1024 to your process. Try reducing the JVM size for your process or increase the IntelliJ JVM memory size
EDIT:
I just learned that the process will not run inside the memory space of the IntelliJ JVM, albeit its own. Also a quick search on the www lead me to understand that the max size of the heap that can be allocated is limited to around 4 GB on a 32bit machine subject to the availability of enough contiguous memory... generally gets limited to 1.2 GB. That might be the problem in your case
It could be that your -Xmx setting on 64bit is larger the one supported by 32bit. You could provide more details about the problem too.
When I try to set -Xms and -Xmx values more than 1gb, I am getting an error:
Error occurred during initialization of VM
My pc has 8GB of RAM.
I need to hold and manipulate a huge amount of data in memory.
A 32-bit JVM can have a maximum heap size of at most 4GB - in some systems it's less due to various technical reasons (such as the need for contiguous memory). Try using a 64-bit version, assuming you're on a 64-bit machine.
The reason for this is that the maximum number of addresses that you can point to with 32 bits is 2^32, which is 4GB. This theoretical maximum can never really be accessed by the user as it is needed by the JVM for Klass files (the internal representation of your code) and other stuff.
Also see this question.
If you are using 64 bit os than the real solution is adding -d64 to force it to run in 64 bits and therefore allocate the 4GBs.
i would definitely suggest you to go thru article
http://javarevisited.blogspot.in/2013/04/what-is-maximum-heap-size-for-32-bit-64-JVM-Java-memory.html
Apart from Ram, xmx paramters also depends on parameters like os,jvm bit etc.
Also would suggest you to ahve statistics to determine how much free memory is there. See http://viralpatel.net/blogs/getting-jvm-heap-size-used-memory-total-memory-using-java-runtime/ to determine how much meory is in use and free memory.
To have best utilization it should be both i.e 64 bit os and 64 bit bit vm
On 32-bit editions of Windows, applications have 4 gigabyte (GB) of virtual address space available. The virtual address space is divided so that 2-GB is available to the application and the other 2-GB is available only to the system.See http://msdn.microsoft.com/en-us/library/Aa366521
so make sure you have enough memory(whatever you are mentioning against params xms and xmx) with the program i mentioned above
IMHO it's about the same problem with slight difference in question..
Eclipse memory allocation problem
As you can see Java Runtime Environment are set in Java Control Panel. Try to add Runtime parameter e.g -Xmx3072m in Runtime Parameter's column.
Or perhaps you could check this article out..
How to Increase Java Memory in Windows 7
Hope it's help solving the problem...
Regards,
Ivan
I've always been able to allocate 1400 megabytes for Java SE running on 32-bit Windows XP (Java 1.4, 1.5 and 1.6).
java -Xmx1400m ...
Today I tried the same option on a new Windows XP machine using Java 1.5_16 and 1.6.0_07 and got the error:
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.
Through trial and error it seems 1200 megabytes is the most I can allocate on this machine.
Any ideas why one machine would allow 1400 and another only 1200?
Edit: The machine has 4GB of RAM with about 3.5GB that Windows can recognize.
Keep in mind that Windows has virtual memory management and the JVM only needs memory that is contiguous in its address space. So, other programs running on the system shouldn't necessarily impact your heap size. What will get in your way are DLL's that get loaded in to your address space. Unfortunately optimizations in Windows that minimize the relocation of DLL's during linking make it more likely you'll have a fragmented address space. Things that are likely to cut in to your address space aside from the usual stuff include security software, CBT software, spyware and other forms of malware. Likely causes of the variances are different security patches, C runtime versions, etc. Device drivers and other kernel bits have their own address space (the other 2GB of the 4GB 32-bit space).
You could try going through your DLL bindings in your JVM process and look at trying to rebase your DLL's in to a more compact address space. Not fun, but if you are desperate...
Alternatively, you can just switch to 64-bit Windows and a 64-bit JVM. Despite what others have suggested, while it will chew up more RAM, you will have much more contiguous virtual address space, and allocating 2GB contiguously would be trivial.
This has to do with contiguous memory.
Here's some info I found online for somebody asking that before, supposedly from a "VM god":
The reason we need a contiguous memory
region for the heap is that we have a
bunch of side data structures that are
indexed by (scaled) offsets from the
start of the heap. For example, we
track object reference updates with a
"card mark array" that has one byte
for each 512 bytes of heap. When we
store a reference in the heap we have
to mark the corresponding byte in the
card mark array. We right shift the
destination address of the store and
use that to index the card mark array.
Fun addressing arithmetic games you
can't do in Java that you get to (have
to :-) play in C++.
Usually we don't have trouble getting
modest contiguous regions (up to about
1.5GB on Windohs, up to about 3.8GB on Solaris. YMMV.). On Windohs, the
problem is mostly that there are some
libraries that get loaded before the
JVM starts up that break up the
address space. Using the /3GB switch
won't rebase those libraries, so they
are still a problem for us.
We know how to make chunked heaps, but
there would be some overhead to using
them. We have more requests for faster
storage management than we do for
larger heaps in the 32-bit JVM. If you
really want large heaps, switch to the
64-bit JVM. We still need contiguous
memory, but it's much easier to get in
a 64-bit address space.
The Java heap size limits for Windows are:
maximum possible heap size on 32-bit Java: 1.8 GB
recommended heap size limit on 32-bit Java: 1.5 GB (or 1.8 GB with /3GB option)
This doesn't help you getting a bigger Java heap, but now you know you can't go beyond these values.
Oracle JRockit, which can handle a non-contiguous heap, can have a Java heap size of 2.85 GB on Windows 2003/XP with the /3GB switch. It seems that fragmentation can have quite an impact on how large a Java heap can be.
The JVM needs contiguous memory and depending on what else is running, what was running before, and how windows has managed memory you may be able to get up to 1.4GB of contiguous memory. I think 64bit Windows will allow larger heaps.
Sun's JVM needs contiguous memory. So the maximal amount of available memory is dictated by memory fragmentation. Especially driver's dlls tend to fragment the memory, when loading into some predefined base address. So your hardware and its drivers determine how much memory you can get.
Two sources for this with statements from Sun engineers: forum blog
Maybe another JVM? Have you tried Harmony? I think they planned to allow non-continuous memory.
I think it has more to do with how Windows is configured as hinted by this response:
Java -Xmx Option
Some more testing: I was able to allocate 1300MB on an old Windows XP machine with only 768MB physical RAM (plus virtual memory). On my 2GB RAM machine I can only get 1220MB. On various other corporate machines (with older Windows XP) I was able to get 1400MB. The machine with a 1220MB limit is pretty new (just purchased from Dell), so maybe it has newer (and more bloated) Windows and DLLs (it's running Window XP Pro Version 2002 SP2).
I got this error message when running a java program from a (limited memory) virtuozzo VPS. I had not specified any memory arguments, and found I had to explicitly set a small amount as the default must have been too high. E.g. -Xmx32m (obviously needs to be tuned depending on the program you run).
Just putting this here in case anyone else gets the above error message without specifying a large amount of memory like the questioner did.
sun's JDK/JRE needs a contiguous amount of memory if you allocate a huge block.
The OS and initial apps tend to allocate bits and pieces during loading which fragments the available RAM. If a contiguous block is NOT available, the SUN JDK cannot use it. JRockit from Bea(acquired by Oracle) can allocate memory from pieces.
Everyone seems to be answering about contiguous memory, but have neglected to acknowledge a more pressing issue.
Even with 100% contiguous memory allocation, you can't have a 2 GiB heap size on a 32-bit Windows OS (*by default). This is because 32-bit Windows processes cannot address more than 2 GiB of space.
The Java process will contain perm gen (pre Java 8), stack size per thread, JVM / library overhead (which pretty much increases with each build) all in addition to the heap.
Furthermore, JVM flags and their default values change between versions. Just run the following and you'll get some idea:
java -XX:+PrintFlagsFinal
Lots of the options affect memory division in and out of the heap. Leaving you with more or less of that 2 GiB to play with...
To reuse portions of this answer of mine (about Tomcat, but applies to any Java process):
The Windows OS
limits the memory allocation of a 32-bit process to 2 GiB in total (by
default).
[You will only be able] to allocate around 1.5 GiB heap
space because there is also other memory allocated to the process
(the JVM / library overhead, perm gen space etc.).
Why does 32-bit Windows impose a 2 GB process address space limit, but
64-bit Windows impose a 4GB limit?
Other modern operating systems [cough Linux] allow 32-bit processes to
use all (or most) of the 4 GiB addressable space.
That said, 64-bit Windows OS's can be configured to increase the limit
of 32-bit processes to 4 GiB (3 GiB on 32-bit):
http://msdn.microsoft.com/en-us/library/windows/desktop/aa366778(v=vs.85).aspx
Here is how to increase the Paging size
right click on mycomputer--->properties--->Advanced
in the performance section click settings
click Advanced tab
in Virtual memory section, click change. It will show ur current paging
size.
Select Drive where HDD space is available.
Provide initial size and max size ...e.g. initial size 0 MB and max size
4000 MB. (As much as you will require)
**There are numerous ways to change heap size like,
file->setting->build, exceution, deployment->compiler here you will find heap size
file->setting->build, exceution, deployment->compiler->andriod here also you will find heap size. You can refer this for andriod project if you facing same issue.
What worked for me was
Set proper appropriate JAVA_HOME path incase you java got updated.
create new system variable computer->properties->advanced setting->create new system variable
name: _JAVA_OPTION value: -Xmx750m
FYI:
you can find default VMoption in Intellij
help->edit custom VM option , In this file you see min and max size of heap.**
First, using a page-file when you have 4 GB of RAM is useless. Windows can't access more than 4GB (actually, less because of memory holes) so the page file is not used.
Second, the address space is split in 2, half for kernel, half for user mode. If you need more RAM for your applications use the /3GB option in boot.ini (make sure java.exe is marked as "large address aware" (google for more info).
Third, I think you can't allocate the full 2 GB of address space because java wastes some memory internally (for threads, JIT compiler, VM initialization, etc). Use the /3GB switch for more.
I have a program that needs a lot of memory and want to set the maximum heap space at 6024MB.
Java gives me the error:
Invalid maximum heap size: -Xmx6024m
The specified size exceeds the maximum representable size.
Is there a workaround?
There are big differences between how many heap one can allocate between the different Java VMs. E.g. Sun's VM needs to allocate the memory as a single block from the OS. This limitation does not exist for Oracle's JRockit VM. It is also OS dependent -- e.g. I was able to allocate more heap with Sun's VM using Linux than was possible with Windows XP. Also note that I read somewhere that the problem goes away for 64bit OSes...
Edit:
Here's a blog entry about Sun's JVM and Java heap space issues on 32bit Windows OSes.
Is this a 64 bit VM? If so, you should be able to use the switch as you did.
IBM JRE 5.0 on Windows, when given -Xmx1536m on a laptop with 2GB memory, refuses to start up: error message below. With -Xmx1000m it does start.
Also, it starts fine with -Xmx1536m on other servers and even laptops, so I think that there is something more than just inadequate memory.
Also, when started from within Eclipse (albeit, using the JRE in the IBM 5 JDK in this case) with the same memory parameter, it runs fine.
Any idea what is going on here?
JVMJ9VM015W Initialization error for library j9gc23(2): Failed to instantiate heap. 1536M requested
Could not create the Java virtual machine
Edit:
Does anyone know about the "3GB switch" and if it is relevant here (beyond the obvious fact that approximately that this is a memory limitations problem). How can I tell if it is enabled and what is the most straightforward way to turnit on?
According to IBM DeveloperWorks:
Cause
The system does not have the necessary resources to satisfy the
maximum default heap value required to
run the JVM.
To resolve, here is what it says
Resolving the problem
If you receive
this error message when starting the
JVM, free
memory by stopping other applications
that might be consuming system
resources.
Your JVM doesn't have enough memory resources to create maximum amount of heap space of 1536 MB. Just make sure that you have enough memory to accommodate it.
Also, I believe that in Windows, the maximum heap space is 1000MB? I'm not sure if that's solid, but in Linux/AIX, any Xmx more than 1GB works fine.
The JVM requires that it be able to allocate its memory as a single contiguous block. If you are on a 32-bit system, the maximum available is about 1280M more or less. To get more you must run a 64-bit JVM on a 64-bit OS.
You may be able to get a little more by starting the JVM immediately after rebooting.
As to starting OK on other systems, are those 32 or 64-bit?
Pretty much the maximum you are guaranteed to get on a Windows platform is 1450 MB. Sometimes Windows/Java.exe maps DLLS to addresses in the 1.5-2.0GB range. This doesn't change even if you use the /3GB trick (or you have an OS that supports it). You have to manually rebase the DLLs to get them higher towards the 2GB (or 3GB boundary). It's a real pain in the ass, and I've done it before, but the best I've ever been able to get with and without a combination of /3GB is 1.8G on 32bit Windows.
Best to be done with it and migrate to a 64-bit OS. They're prevalent now-a-days.
I have the same issue in IBM Engineering lifecycle installation:-
Problem:- JVMJ9VM015W Initialization error for library j9gc26(2): Failed to instantiate heap; Could not create the Java virtual machine.
Solution:- I just did it and solve my issue. If you don't have 16GB ram then please don't change the jazz server startup file. If you have 8GB ram then Only do not increase memory size in the server.:
**set JAVA_OPTS=%JAVA_OPTS% -Xmx4G**
**set JAVA_OPTS=%JAVA_OPTS% -Xms4G**
**set JAVA_OPTS=%JAVA_OPTS% -Xmn1G**