Oracle 11g AMM (automatic memory management)

Hi all

I have a very powerful server 24 processors 6 hearts of each and 74 GB of RAM for my production database. The server will host what a single database of production. I wanted to use the AMM for this database and maximum memory allocation to Oracle by defining memory_target. By default, / dev/SHM has 37 GB but I wanted to increase it less 55GO. I know I can get it changed by my system administrator, but I wanted to know how much memory should leave BONES?

Please help me on this design.

Thank you

Arun Singh

The POSIX or/dev/SHM shared memory is 50% of physical RAM by default. If you want to change the default, you need to specify your OS version, because it depends on.

However, thanks to WMA or/dev/shm in a system with more than 16 GB of RAM you are going to lose a lot of performance and memory, which, according to Oracle Linux engineering is the reason number 1 for poor Oracle database performance. Memory POSIX shared in your configuration will result in the loss of performance due to TLB misses and waste memory only to manage the memory of 4 KB pages.

I recommended that configure the system using the kernel hugepages, which use memory 2 MB pages, remove memory_target and memory_max_target of your instance settings file and configure the database to use EAMA.

Tags: Database

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    ======================+

    Resolution in Windows 7 stop errors (blue screen) - has a section for if you can or cannot start Windows.
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    -------------------------------------------------------------

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    ==========================================================

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    -------------------------------------------------------------------------

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    BlueScreens many are caused by old or damaged, in particular the video drivers drivers however
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    -------------------------------------------------------------------------

    Start - type this in the search box-> find COMMAND at the top and RIGHT CLICK – RUN AS ADMIN

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    -------------------------------------------------------------------------

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    -------------------------------------------------------------------------

    How to fix BlueScreen (STOP) errors that cause Windows Vista to shut down or restart
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    Understanding and decoding BSOD (blue screen of death) Messages
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    -------------------------------------------------------------------------

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    Startup Options recovery or Windows 7 disk repair

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    How to do a repair installation to repair Windows 7
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    --------------------------------------------------------------------------------------------
    Rob Brown - Microsoft MVP<- profile="" -="" windows="" experience :="" bicycle="" -="" mark="" twain="" said="" it="">

  • Windows 7 allows the application of compaction in the memory manager. If yes where can I find more information.

    Windows 7 allows the application of compaction in the memory manager.  If yes where can I find more information.

    Thank you

    Memory management is controlled automatically by Windows.  Do a search in Help and Support for compaction gives no results, so I think that the answer is no.  It is usually a good idea to reboot at least once a week to clean fragments that might be lingering around.  There is a defragmentation of your hard drive that you can schedule or manually run.

    Good luck.

  • need help:(windows 8 plusieurs bsod se bloque c'est à dire.) memory management, irql not..., kernel mode...

    https://drive.Google.com/file/d/0B0ATyEKasqZmbkpPNG1WSXd0STA/edit?USP=sharing

    theres a link to all my minidumps.

    I don't know what to do, I have many BSODs in a row and then many times where I can use the computer for hours. It seems completely random. That this has something to do with the closures of power?

    Thank you!

    BUGCODE_USB_DRIVER (FE)

    This indicates that an error occurred in a bus universal series (USB) driver.

    3: kd > k
    Call child-SP RetAddr site
    fffff880'014f81e8 fffff880'0464 484 nt c! KeBugCheckEx
    fffff880 '014f81f0 fffff880' 04615ce2 USBPORT! USBPORT_ProcessURB + 0 x 36644
    fffff880 '014f8310 fffff880' 04615afd USBPORT! USBPORT_PdoInternalDeviceControlIrp + 0 x 52
    fffff880 '014f8360 fffff880' 047536f1 USBPORT! USBPORT_Dispatch + 0x17d
    fffff880 '014f83c0 fffff880' 047533ca usbhub! 0x1f1 + UsbhPdoInternalDeviceControl
    fffff880 '014f8430 fffff880' 0104f0a7 usbhub! UsbhGenDispatch + 0x9a
    fffff880 '014f8460 fffff880' 058f63b6 Wdf01000! imp_WdfRequestSend + 0x4b3
    fffff880'014f84f0 fffffa80'05468700 netr28ux + 0x9a3b6
    fffff880 '014f84f8 fffffa80' 0559db30 0xfffffa80'05468700
    fffff880 '014f8500 fffffa80' 055a 1020 0xfffffa80'0559db30
    fffff880 ' 014f8508 00000000 00000000 of ' 0xfffffa80 ' 055a 1020

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    PAGE_FAULT_IN_NONPAGED_AREA (50)

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    Bugcheck 50, {fffff12014494a90, 1, fffff803968f06f5, 2}

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    3: kd > r cr2
    Last set context:
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    3: kd >! fffff12014494a90 pte
    GO fffff12014494a90
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    3: kd > dd fffff12014494a90
    fffff120'14494 has 90? ???????? ???????? ????????
    fffff120'14494aa0? ???????? ???????? ????????
    fffff120'14494ab0? ???????? ???????? ????????
    fffff120'14494ac0? ???????? ???????? ????????
    fffff120'14494ad0? ???????? ???????? ????????
    fffff120'14494ae0? ???????? ???????? ????????
    fffff120'14494af0? ???????? ???????? ????????
    fffff120'14494 b 00? ???????? ???????? ????????

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    Child-SP RetAddr: Args to child: call Site
    fffff880 '09db76f8 fffff803' a 969385, 0: 00000000'00000050 fffff120 '14494a 90 00000000 00000001' fffff880' 09db78e0: nt! KeBugCheckEx
    "fffff880 '09db7700 fffff803' 968b1acb: 00000000 ' 00000001 fffff120" 14494a 90 fffffa80 '07a14b00 fffff803' 968c0db0: nt! : FNODOBFM: 'string' + 0x33e2a
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    fffff880 '09db78e0 fffff803' 968f06f5: fffff803 ' 9684f363 fffffa80 '041ab868 06cafaf0' 06cafaf0 fffffa80 ' 07a 05010: nt! KiPageFault + 0x16e (TrapFrame @ fffff880'09db78e0)
    fffff880 '09db7a78 fffff803' 9684f363: fffffa80 ' 041ab868 06cafaf0 '06cafaf0 fffffa80' 07a 05010 fa80041a ' b89004c2: nt! MiResolveDemandZeroFault + 0x5
    "fffff880 '09db7a80 fffff803' 968b1e1c: 00000000 ' fffffa80 00000000 '07a14b00 fffff880' 09db7b80 fffffa80 ' 0615b 568: nt! MiProtoFault + 0x1a3
    fffff880 '09db7b00 fffff803' 96874eee: 00000000'00000000 00000000' 550280cb 0000006c 'af0ef501 fffff880' 09db7c40: nt! MmAccessFault + 0x8ac
    fffff880 '09db7c40 000007fd' c1ee0a00: 00000000'00000000 00000000'00000000 00000000'00000000 00000000'00000000: nt! KiPageFault + 0x16e (TrapFrame @ fffff880'09db7c40)
    0000006c 'af0ef530 00000000' 00000000: 00000000'00000000 00000000'00000000 00000000'00000000 00000000'00000000: 0x000007fd'c1ee0a00

    3: kd > .trap fffff880'09db78e0
    NOTE: The frame trap does contain not all registers.
    Some registry values can be set to zero or incorrect.
    Rax = 0000000000000002 rbx = 0000000000000000 rcx = 0000000000000000
    RDX = fffff8a00a6dd000 rsi = 0000000000000000 rdi = 0000000000000000
    RIP = fffff803968f06f5 rsp = fffff88009db7a78 rbp = fffffa8007a14b00
    R8 = 0000000000000000 r10 = fffff8a00a6dd000 fffff6fc500536e8 = r9
    R11 = 0000000006cafaf0 r12 = 0000000000000000 r13 = 0000000000000000
    R14 = 0000000000000000 r15 = 0000000000000000
    iopl = 0 nv up ei pl zr po nc
    nt! MiResolveDemandZeroFault + 0 x 5:
    fffff803'968f06f5 4 c 89442418 mov qword ptr [rsp + 18 h], r8 ss:fffff880'09db7a90= fffffa8007a05010

    Address to education, we failed on, fffff803'968f06f5 deferenced RER + 18 h where rsp + 18 h is fffff88009db7a78. This would result in a write from memory at the address fffff880'09db7a90.

    3: kd >! PTE fffff880'09db7a90
    GO fffff88009db7a90
    PXE to the EPP of FFFFF6FB7DBEDF88 at FFFFF6FB7DBF1000 at FFFFF6FB7E200270 at FFFFF6FC4004EDB8 PTE POE
    contains 0000000000624863 contains 0000000000623863 contains 0000000038208863 contains 800000004123C 963
    GetUlongFromAddress: cannot read fffff80396b750e4
    NFP 624 - DA - KWEV NFP 623 - DA - KWEV NFP 38208 - DA - KWEV NPF 4123c - G-DA - KWEV

    3: kd > dd fffff880'09db7a90
    fffff880'09db7a90 fffffa80 b89004c2 fa80041a a 07, 05010
    fffff880' 96b6e700 00000000 00000011 fffff803 09db7aa0
    fffff880'09db7ab0 a927a274 ffff2ad2 c0000016 00000000
    fffff880'09db7ac0 fffff880 afaf0000 0000006c 09db7c40
    fffff880'09db7ad0 fffff880 afaf0000 0000006c 09db7c40
    fffff880'09db7ae0 00000000 00000000 fffff8a0 0a6dd000
    fffff880'09db7af0 00000000 968b1e1c fffff803 c0000016
    fffff880'09db7b00 00000000 00000000 fffffa80 07a14b00

    Right, so code wanted to write to fffff880'09db7a90 which, as we can see above is a valid address. The 1st parameter and cr2 however note that we have not written to the address fffff12014494a90.

    nt! MiResolveDemandZeroFault said the material to write in fffff880'09db7a90 (who once again of incidentally is a completely valid address), and the material came back and said 'I can't write fffff12014494a90.

    However, this seems very material right here - nom_processus: avgrsa.exe is an associated AVG process at the time of the accident.

    MEMORY_MANAGEMENT (1A)

    This indicates that an error occurred serious memory management.

    Error checking 1 a, {5003, fffff70001080000, 620, 62200000 c 50}

    -1 setting of the bug check is 5003 which lists free work is corrupt. It is usually a hardware error, however, a device driver causing corruption is possible as well at times.

    ATTEMPTED_EXECUTE_OF_NOEXECUTE_MEMORY (CF)

    This indicates that an attempt was made to execute non-executable memory.

    KMODE_EXCEPTION_NOT_HANDLED (1e)

    This indicates that a kernel-mode program generated an exception which did not catch the error handler.

    3: kd > k
    Call child-SP RetAddr site
    fffff880 '02af70b8 fffff801' da400c56 nt! KeBugCheckEx
    fffff880 '02af70c0 fffff801' da34c4bd nt! KiFatalExceptionHandler + 0 x 22
    fffff880 '02af7100 fffff801' da3743d4 nt! RtlpExecuteHandlerForException + 0xd
    fffff880 '02af7130 fffff801' da34e216 nt! RtlDispatchException + 0 x 458
    fffff880 '02af7840 fffff801' da2df842 nt! KiDispatchException + 0 x 455
    fffff880 '02af7f00 fffff801' da2dd59f nt! KiExceptionDispatch + 0xc2
    fffff880 '02af80e0 fffff801' da461287 nt! KiInvalidOpcodeFault + 0x11f
    fffff880 '02af8270 fffff801' da31cfe4 nt! : FNODOBFM: 'chain' + 0 x 16175
    fffff880 '02af8360 fffff880' 052d50f4 nt! KeSetEvent + 0x1c3
    fffff880 '02af83d0 00000000 fffffa80' netr7364 + 0x320f4
    fffff880'02af83d8 fffffa80 '0xfffffa80 00000000' 00000000
    fffff880 '02af83e0 fffffa80' 06de3152 0xfffffa80'00000000
    "fffff880'02af83e8 fffffa80 ' 07039808 0xfffffa80 ' 06de3152
    fffff880 '02af83f0 fffffa80' 06de3018 0xfffffa80'07039808
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    -------------------------

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    Patrick

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