Native Memory Area

JVM Memory = Heap + Non-Heap
I have configured JVM Memory as 1.5 GB. (OS is Windows) Perm Gen as 74 MB. In between i get "unable to create native threads" issue. I understand that a process in Windows can use a maximum memory of 2 GB.
1. Is the NATIVE MEMORY space part of Non-Heap? Or is it the remaining of (2GB - (HEAP+NON_HEAP)) ?
2. Is there a way to get the NATIVE MEMORY SPACE used by the java instance?

I doubt the answers to any of those matter to your problem.
If you have the heap maxed out and you are getting that error then you are probably just creating too many threads.
If you are doing that on purpose then you need to redesign.
If you are doing it accidently then you need to find the bug that keeps the threads active and fix it.

Similar Messages

Out of HEAP vs. out of NATIVE memory

I'm working on a document to help our support team classify our customers' out-of-memory errors and know whether it is due to HEAP or NATIVE MEMORY. I've pulled some errors we've seen in domain logs from customers and tried to classify them. Can someone tell me if I got these right?
These are the ones I think are out of heap errors:
1) Allocation of … bytes failed for heap
TLA bailout requested
TLA unwind thread links
2) java.lang.OutOfMemoryError
3) Throwing OutOfMemory: nativeGetNewTLA
Throwing OutOfMemory: allocLargeObjectOrArray
These are the ones I think are out of native memory:
4) Throwing OutOfMemory
Unable to equeue element
JRockit aborted: Out of memory (68)
5) JRockit aborted: Out of memory (68)
Failed to acquire native memory. Try reducing Java heap size
I'm not sure if we've seen this one yet after upgrading to WebLogic 10 from WebLogic 8
Thanks,
-Bill

Hi,
I have some similar problem.
I have have the Maximum heap size set to 4GB, but the total java process takes up to 40GB or 64GB memory. I had this problem in September last year, and it came back yesterday.
I would like to know what in the code of my application can make JRockit behave this way; I get no OutOfMemorError which means that my application does not use too much memory, so what does ??
Any ideas are really welcome :)

JRockit out of native memory errors - what effects native memory usage

I've seen postings which suggest a way to combat out of native memory errors is to reduce the heap size. That is fine but if you have some parts of your application which run fine and others that run the system out of native memory almost immediately then you may have a code problem. So the question is what, if anything, in the java code affects the JVM's usage of native memory?

There are lots of things that affect the native memory usage. For example: the number of classes, the size of the classes, the complexity of the type hieararchy, the number of threads, the amount of code generated, the complexity of the methods and so on.
It may also be an error in the JVM that either leaks memory or temporarily uses too much memory (for example while generating code for a java method).
Not sure this was very helpful...
/Staffan

How to find native memory usage for a domain

Hi All,
We want to know how to find out current native momory utilization for a perticular weblogic domain. Basically we want to increase our current JVM heap size from 2 GB to 3.5GB because of 32 bit JDK restriction we are not having confident to increase at the memont. If we can get the current native memory utization then we will have a idea how to pregess and change in production env.
OS - Solaris 10
Weblogic - 9.2
Java - 1.5
Thanks and Regards
Dinabandhu

920767 wrote:
Basically we want to increase our current JVM heap size from 2 GB to 3.5GB because of 32 bit JDK restriction we are not having confident to increase at the memontSurprisingly enough to me that will not work. The maximum on solaris is 2G presuming you are running on a 32 OS.
http://www.oracle.com/technetwork/java/hotspotfaq-138619.html#gc_heap_32bit
We want to know how to find out current native momory utilization for a perticular weblogic domainMemory is per process. Weblogic, the server, is one process (one VM.) Thus you can't increase the application memory for only part of it. I doubt weblogic has a way to limit it by app.

Unaccounted for Memory is too big and lead to Native Memory Issuse.

In our server, after running 1 month, Unaccounted memory will increase up to 500m or higher. And the native memory will be big. So it lead to OOM. Below are one sample:
j2eeapp:jhf1wl101:root > jrcmd 27398 print_memusage
27398:
[JRockit] memtrace is collecting data...
[JRockit] *** 19th memory utilization report
(all numbers are in kbytes)
Total mapped ;;;;;;;5100644
; Total in-use ;;;;;;4038952
;; executable ;;;;; 75968
;;; java code ;;;; 23680; 31.2%
;;;; used ;;; 21833; 92.2%
;; shared modules (exec+ro+rw) ;;;;; 4858
;; guards ;;;;; 5928
;; readonly ;;;;; 0
;; rw-memory ;;;;;3986664
;;; Java-heap ;;;;3145728; 78.9%
;;; Stacks ;;;; 126050; 3.2%
;;; Native-memory ;;;; 714885; 17.9%
;;;; java-heap-overhead ;;; 99596
;;;; codegen memory ;;; 1088
;;;; classes ;;; 166656; 23.3%
;;;;; method bytecode ;; 13743
;;;;; method structs ;; 21987 (#281446)
;;;;; constantpool ;; 72105
;;;;; classblock ;; 7711
;;;;; class ;; 11900 (#21166)
;;;;; other classdata ;; 22950
;;;;; overhead ;; 114
;;;; threads ;;; 960; 0.1%
;;;; malloc:ed memory ;;; 81024; 11.3%
;;;;; codeinfo ;; 4815
;;;;; codeinfotrees ;; 2614
;;;;; exceptiontables ;; 1790
;;;;; metainfo/livemaptable ;; 24519
;;;;; codeblock structs ;; 20
;;;;; constants ;; 33
;;;;; livemap global tables ;; 8684
;;;;; callprof cache ;; 0
;;;;; paraminfo ;; 255 (#2929)
;;;;; strings ;; 24040 (#345745)
;;;;; strings(jstring) ;; 0
;;;;; typegraph ;; 10132
;;;;; interface implementor list ;; 260
;;;;; thread contexts ;; 598
;;;;; jar/zip memory ;; 12204
;;;;; native handle memory ;; 486
;;;; unaccounted for memory ;;; 366520; 51.3%;4.52
---------------------!!!

>
"No one is perfect - not even Mac OS X. If a program manages to lock up central processes, a restart will be needed."
That first part of what you said there is indeed true.
But a modern OS is designed to keep processes separated. An application crash
SHOULD NOT
require a complete shut-down and reboot of your system. Yes, the Log-Out/Log back in process might take awhile if you have a particularly bad application crunch, because the OS has detected that something went screwy and is checking to see that the user account is healthy enough to run, and may be fixing some things in the process.
I've run all kinds of not-quite-polished software over the years since my adoption of OS X, and no matter how badly some of it performed nothing ever required me to reboot my system to restore operating health. Now, that's not to say I don't run system maintenance utilities which, after performing their routines, suggest or require a shutdown restart. I usually only do this if I've decided to delete the offending application from my system. (Sidebar: How diligent are you about maintaining the general health of your system through the regular practice of running preventative maintenance routines? Ramon may be along shortly to lay the boiler-plate on you about this :))
Does Photoshop dig its hooks so deeply into the root level of the OS that it could cause the kind of problems you've had? I don't know for sure, but I'd guess that it's possible. And I'd suggest that, if wonky Photoshop behavior can be so bad that it
requires
the user to restart in order to regain operational health, then something is VERY wrong. And I'd go even further out on a limb to guess that this is a fault in Adobe's Photoshop coding, and not in Apple's OS coding.

How is the native memory limit (malloc) computed?

On Windows (32 bits), with the SUN JVM, the memory space that can be allocated in native code (e.g. with malloc in C) is limited and depends on the maximum heap size, specified with the -mx JVM argument. The larger the heap size, the smaller the native code memory limit.
With JRockit, this limit is higher: it is possible to allocate more memory in native code than with the Sun JVM.
However, on some machines the memory limit is not higher. The problem is that I see no difference in the configuration of these machines. They also have 2GB of RAM, with the same amount of free memory (virtual and physical), the same OS and the same OS version. On both machines, the same application is used, with the same JVM arguments.
On some machines, we can use a -mx600m and allocate a given amount of memory in native code, and on other machines, for the same amount of native memory, we can only use a -x300m.
Do you have an idea, what the difference can be? Is it possible on these other machines to use a higher -mx value?
Thanks,
Laurent
We are using jrockit-R27.2.0-jre1.5.0_10 on windows XP.

It's possible that some DLL is eating up process address space. Start JRockit with -Xverbose:memdbg to get an ascii graphic over the address space. Or use something like Process Explorer to see what is loaded into memory and where.
-- Henrik

How much memory are actually being used? db_32k_cache_size

Hi everyone,
Using Oracle 10g on RHEL 5.3.
I've been asked to check how much memory are actually being used by our db cache's. Currently we are using the parameters db_32k_cache_size (user-defined) and db_8k_cache_size (default) both allocated with 12gb. Now I want to know if there is any way to find out how much of the 12gb are actually being used by the cache.
Is this possible?
Thanks

Thanks Guys,
Okay, so it is using the whole 12gb. I guess the next question would be, is 12gb really needed? You see, we are trying to increase memory where possible as this database has performance issues. Now we are thinking of taking some of the 12gb that is allocated to the 32k cache and assign it to the sga for instance.
Does this make any sense?
Regards

In memory area is enough ,but table can't POPULATED in memory ,cause query in memory slower

hI
any expert can take a look this issue, thanks
SQL> select *　FROM　gv$inmemory_area order by 1;
   INST_ID POOL ALLOC_BYTES USED_BYTES POPULATE_STATUS CON_ID
1 64KB POOL 4278190080   17301504 DONE 0
1 1MB POOL 17177772032 9377415168 DONE 0
2 1MB POOL 17177772032 9380560896 DONE 0
2 64KB POOL 4278190080   17301504 DONE 0
3 64KB POOL 4278190080   17301504 DONE 0
3 1MB POOL 17177772032 9385803776 DONE 0
4 1MB POOL 17177772032 9546235904 DONE 0
4 64KB POOL 4278190080   17301504 DONE                                0
8 rows selected
(IN MEMORY AREA SIZE IS BIG enough)
SQL> SELECT v.owner, v.segment_name name,v.populate_status status, v.bytes_not_populated FROM v$im_segments v;
OWNER                                                                            NAME                                                                             STATUS    BYTES_NOT_POPULATED
BI                                                                               PERFTABLE5                                                                       COMPLETED                   0
BI                                                                               PERFTABLE3                                                                       COMPLETED                   0
BI                                                                               PERFTABLE4                                                                       COMPLETED                   0
BI                                                                               PERFTABLE2                                                                       COMPLETED                   0
BI                                                                               PERFTABLE3                                                                       COMPLETED                   0
BI                                                                               PERFTABLE1                                                                       COMPLETED           165855232
BI                                                                               PERFTABLE4                                                                       COMPLETED                   0
BI                                                                               PERFTABLE3                                                                       COMPLETED                   0
BI                                                                               PERFTABLE1                                                                       COMPLETED                   0
BI                                                                               PERFTABLE4                                                                       COMPLETED                   0
BI                                                                               PERFTABLE5                                                                       COMPLETED                   0
BI                                                                               PERFTABLE3                                                                       COMPLETED                   0
BI                                                                               PERFTABLE2                                                                       COMPLETED                   0
BI                                                                               PERFTABLE1                                                                       COMPLETED           165855232
(table PERFTABLE1   have NOT_POPULATED data) .
cause :IO Requests
select count(*) from perftable1 a, perftable1 b where a.int32_f1 = b.int32_f1.
SQL Plan Monitoring Details (Plan Hash Value=1965173750)
Id
Operation
Name
Estimated
Rows
Cost
Active Period
(100s)
Execs
Rows
Memory
Temp
IO Requests
CPU Activity
Wait Activity
Progress
SELECT STATEMENT
1
. SORT AGGREGATE
1
1
.. PX COORDINATOR
49
... PX SEND QC (RANDOM)
:TQ10000
1
48
.... SORT AGGREGATE
1
48
..... PX PARTITION HASH ALL
202M
81245
48
->
...... HASH JOIN
202M
81245
48
0
689.9MB
1.0GB
3031 (10%)
32%
8.2%
->
....... TABLE ACCESS INMEMORY FULL
PERFTABLE1
200M
36854
48
77M
29926 (105%)
67%
91%
473s
....... TABLE ACCESS INMEMORY FULL
PERFTABLE1
200M
36854

This is the wrong forum for this question. This forum is for the TimesTen In-Memory Database while your question is about the Oracle Database 12c In-Memory Option. Best post this in the main Oracle Database forum.
Chris

REG : in which memory area BackGround process will execute??

hi everyone,
in which memory area , background process will be executed ?
Thanks and Regards,
Nikhil K

Hi,
i want to know if both SAP memory and ABAP memory are not present then in which area Background processes will be executed.
erm, they are always present. Processes do not execute "in" these 2 memories. I advise you to read some reference documentation: [SAP library: Functions of the SAP Memory Management System|http://help.sap.com/saphelp_nw70/helpdata/en/02/96279d538111d1891b0000e8322f96/frameset.htm]
The only difference I know between dialog and background is the sequence in which the roll, extended and heap memories are allocated.
Sandra

How to remove an entry from a memory area?

Hi Experts,
We are facing an issue where a user has exported some wrong data to ABAP memory through an export statement.
The export statement that exported the values is:
EXPORT range_tab_epown
range_tab_dpown
popnot TO DATABASE indx(oh) ID indxkey.
Due to the restrictions in the design of the program, EXPORT statement cannot be executed again for this user.
All we want is to erase this data somehow from the memory area OH.
->We do not want to create a Z report which will erase/replace the data through ABAP statements FREE/DELETE.
->Also ,we cannot alter the data through export statement in debugging mode.
->Resetting the buffer of this user through SU53 Or Log-in/ Log-off does not erase the data.
*Please suggest if we can remove the data from ABAP memory (area OH) for a particular user without creating a Z report.
*Is there any utility program or function module that exists which can help us erase this data?
*Also, please throw some light on the memory where the data is getting stored through the above EXPORT statement.
Regards,
Sid

>EXPORT range_tab_epown
>range_tab_dpown
>popnot TO DATABASE indx(oh) ID indxkey.
This export doesn't write to any memory area. As the key words suggest - it writes TO DATABASE. specifically to cluster table indx, with relid oh.
As far as I am aware, there are no utility programs - you will have to have some ABAP developed.
matt

Shared Memory Areas not accessible in background processing

Hi there
We're using Shared Memory Areas to share data between an on-line transaction and a background program. The on-line transaction collects the data, creates the Shared Memory Area and submits a background job to process it. So, after the detach_commit, it performs submit program via job_name xxxx number nnnn.
It works OK in our dev and quality systems, but does not work in our production system. The memory area is created OK, but the job cannot access it. In the background program, we get the message:
"The read lock on the instance 'ZNNNNNNN' in the client '100' of the shared objects memory area 'ZCL_XXX' cannot be set, since there is no active version of this area instance. However, the area constructor for the automatic construction of the area instance was started."
On the SMA side, we've tried seemingly every combination, even "propagate_instance".
The job seems to be running on the same application server as the SMA.
Any ideas about what we're doing wrong, anyone?
Thanks
Ged

Hello Ged,
Please remember that SHM is accessible across one App Server(AS) only.
If your SAP landscape has multiple AS's then it might pose a problem. When you're scheduling the background job, i guess that the Bgd work process is started in a different AS(load balancing ) and hence SHM is no accessible.
If this is the case, then you've no other option but to store the data persistently in DB clusters viz., INDX-type tables (EXPORT TO/IMPORT FROM DATABASE).
BR,
Suhas
Message was edited by: Suhas Saha

Shared memory area & triggering "client" actions

Hi all,
I'm playing around with shared objects, and I would like to accomplish one thing:
I have a shared memory and a "client" class which uses it.
When one of the instances of this client class calls a specific method of the shared memory root class, another instance of the client class should receive a message from the root class. This other instance would be running under a different user.
Since no events are allowed for shared memory area root classes, event handling on the side of the client class is not possible. I even tried to store references to instances of the client class in the shared memory but this would not work either (surprise! surprise! - CX_SHM_EXTERNAL_REFERENCE
So apart from periodically querying the root class from the client, is there really no way how to initialize the SHMA->client communication from the shared memory area side ?
thanks,
Stanislav Mikulas

If your clients keep the read connection to the shared memory, is there a way to follow this connection back to the clients?
But even if so, how could you trigger an event at the client?
Actually, I think there is no solution besides polling the shared memory objects for changes periodically.

About HIDE memory area

Hi friends,
         I need some information about HIDE area.
         1) Is there any specific memory size for HIDE memory area.
         2) what are the values will be saved into HIDE memeoy area, like only the    values that are followed by HIDE area or the total output list will be saved.
Sathish Reddy.

Hi
HIDE
The HIDE statement is one of the fundamental statements for interactive reporting.
You use the HIDE technique when creating a basic list.
It defines the information that can be passed to subsequent detail lists.
The example below presents some of the essential features of interactive reporting. The basic list contains summarized information. With the HIDE technique, it is possible to branch to more detailed information on subsequent lists.
The following program is connected to the logical database F1S.
REPORT demo_list_hide NO STANDARD PAGE HEADING.
TABLES: spfli, sbook.
DATA: num TYPE i,
      dat TYPE d.
START-OF-SELECTION.
num = 0.
SET PF-STATUS 'FLIGHT'.
GET spfli.
num = num + 1.
WRITE: / spfli-carrid, spfli-connid,
           spfli-cityfrom, spfli-cityto.
HIDE:    spfli-carrid, spfli-connid, num.
END-OF-SELECTION.
CLEAR num.
TOP-OF-PAGE.
WRITE 'List of Flights'.
ULINE.
WRITE 'CA CONN FROM                 TO'.
ULINE.
TOP-OF-PAGE DURING LINE-SELECTION.
CASE sy-pfkey.
    WHEN 'BOOKING'.
      WRITE sy-lisel.
      ULINE.
    WHEN 'WIND'.
      WRITE: 'Booking', sbook-bookid,
           / 'Date   ', sbook-fldate.
      ULINE.
ENDCASE.
AT USER-COMMAND.
CASE sy-ucomm.
    WHEN 'SELE'.
      IF num NE 0.
        SET PF-STATUS 'BOOKING'.
        CLEAR dat.
        SELECT * FROM sbook WHERE carrid = spfli-carrid
                            AND   connid = spfli-connid.
          IF sbook-fldate NE dat.
            dat = sbook-fldate.
            SKIP.
            WRITE / sbook-fldate.
            POSITION 16.
          ELSE.
            NEW-LINE.
            POSITION 16.
          ENDIF.
          WRITE sbook-bookid.
          HIDE: sbook-bookid, sbook-fldate, sbook-custtype,
                sbook-smoker, sbook-luggweight, sbook-class.
        ENDSELECT.
        IF sy-subrc NE 0.
          WRITE / 'No bookings for this flight'.
        ENDIF.
        num = 0.
        CLEAR sbook-bookid.
      ENDIF.
    WHEN 'INFO'.
      IF NOT sbook-bookid IS INITIAL.
        SET PF-STATUS 'WIND'.
        SET TITLEBAR 'BKI'.
        WINDOW STARTING AT 30 5 ENDING AT 60 10.
        WRITE: 'Customer type   :', sbook-custtype,
             / 'Smoker          :', sbook-smoker,
             / 'Luggage weigtht :', sbook-luggweight UNIT 'KG',
             / 'Class           :', sbook-class.
      ENDIF.
ENDCASE.
Regards
Swathi

Tecra 8000: No memory area available to communicate with PC Card

I have a Tecra 8000 running Win98 SE and use a 3Com PCMCIA Card for my Internet Connection. I was troubleshooting my computer on another issue and in the process disabled the PCMCIA Toshiba ToPIC Cardbus Controllers. After enabling these again I am no longer able to communicate with the PC Card and therfore cannot connect to the Internet.
PC Card Troubleshooting Agent states: 'Windows is not able to identify or use the inserted PC Card Device because there is no memory area available to communicate with this device. You must make a memory area available before this device can be used. Check your computer's CONFIG.SYS file for a memory manager that is excluding upper memory regions between A000 and FFFF'.
My Cardbus Controllers are set as follows:
1.Memory Range - 0C000000 - 0C000FFF
2.Memory Range - 0C001000 - 0C001FFF
My PC Card (PCMCIA) Properties are as follows:
Card Services Shared Memory:
Start 000C0000
End 00FFFFFF
Length 00001000
Whilst the PC Card Modem is being recognised in the Port it cannot be communicated with and the error message is shown as follows:
'Error 666: The modem is not plugged in or is out of service. Connect a modem to your computer and try again'.
When I run Modem Diagnostics there is no response except for the following:
'Open Comm: Couldn't open port'
Any help or advice will be much appreciated.

Hi Evan, I have had 2 PC cards damaged during bad thunderstorms in the past. Recently i helped someone to set up her Tecra8000 during another thunderstorm her new extension cable blew up silently! At first i didn't suspect it as the cable was brand new (cannot open port etc). Anyway, i tested the cable with a phone n it was dead and then i got a new extension cable for her from Argos the next day n it worked perfectly!
If ur card is broken then i suggest u get a Phonic PC card V.92 from PC World. It's only 14.99 n the connection speed is surprisingly fast 112.5k ! (I used to pay for 50 !) faster than my new fancy laptop, the internal modem can only connect at 44k !
Hope this helps. Let us know.
PS I have since upgraded her laptop from Win98 to XP, it works rather well on the Tecra8000 (so far so good, she even managed to get her new printer working under XP without asking for my help!). if ur laptop meets the requirements, it MIGHT be worth considering upgrading it to XP.
Lisa

Memory areas used in SAP

Hi Experts,
I have a big confusion in memory areas used in SAP, can anyone help me to define it.
I will list out the memory areas used,
1. Virtual Memory
2. Local Memory
3. Shared Memory
4. Extended Memory
5. Heap Memory
6. Roll Memory
Thanks
KT

> Everybody have their own interpretation so they posted what they knew.
It's more about which terminology you follow. Memory models are not identical implemented across different operating system so all answers here are somewhat correct depending on which OS glasses you wear.
> If i find any authentic material i will post here. SAP Never gave clear memory model diagram how sap maps its memory model to OS memory but they tells about different memories they named and how they will be used during execution.
Because it's OS dependent. You e. g. have on Windows a "view" memory model that uses segmented divisions or a "flat" memory model. On Linux you can use an mmap()'ed or a standard shmget() based model etc. etc.
> all applications will get memory allocation only from virtual memory. Even ST02 buffers also get memory allocation from OS virtual memory. It is not clearly mentioned any where that ST02 buffers will reside only in RAM.
http://help.sap.com/saphelp_nw70/helpdata/EN/34/d9c8b3c23c11d188b40000e83539c3/frameset.htm
<...>
Virtual memory
All operating systems (supported by SAP) support virtual memory technology. A process allocates virtual memory using logical (virtual) addresses. Each process has its own virtual address space.
<...>
> SAP Local memory: SAP tells that this is the memory reside with workprocess at os level and remains with it until shutdown.
http://help.sap.com/saphelp_nw70/helpdata/EN/22/5d980297cb48129e663b0d4a3e844d/content.htm
<...>
Local process memory
The operating system differentiates between local process memory and shared memory. For local process memory the operating system keeps both allocation steps transparent. Using an API virtual memory only is requested; the operating system does the other tasks, such as reserving physical memory, loading and unloading virtual memory into and out of the main memory.
<...>
Check
http://help.sap.com/saphelp_nw70/helpdata/EN/d1/80b716dc8111d2ac8f0000e83539c3/frameset.htm
which describes how this is implemented on the different operating system. So if you want to know how to match the SAP-View to the OS view you need to specify the OS.
Markus

Native Memory Area

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