Question about 11gR2 Grid, RAC, /dev/shm and Automatic Memory Management

Hello,
i've recently installed grid and rdbms software 11.2.0.2 on a two node Oracle Linux cluster with 128gb ram each node.
I'm using ASM to store data and ocr and I'm testing Automatic Memory Management.
When I finished Grid+RDBMS installation I've seen that /dev/shm size is 64gb (half of my total RAM).
I've created a database with dbca and when I was asked to choose if I wanted to use AMM I've noticed that I could
allocate only about 60gb for Oracle. If I chose more than 90gb I got an error saying:
Using Automatic Memory Management requires 60gb available in my two nodes.
The current available space in the two nodes is only 30gb and 30gb.
If you want to use AMM you should either free up some space in /dev/shm
or reduce the memory allocated to Oracle
I was wondering when (during the installation or the settings of kernel parameters) did I define the space of /dev/shm ?
Since I have 128gb of RAM wouldn't it be better to use more than 64gb of ram for my /dev/shm tmpfs partition ?
Is there a limit or a ratio for best practice for my RAM and the /dev/shm ?
thanks in advance.

user9051299 wrote:
Is the "half of the RAM size" a kernel's default value or Oracle's ? Neither. There are a number of unique factors that determine the best memory size and fit for Oracle - including just how much memory is effectively available (i.e. how much is needed for other services and processes).
And from what I understand i don't "break" any Oracle's best practice by increasing the /dev/shm right ?Correct. (at least none that I'm aware of, and none that I have read in Oracle's RAC Starter Kit documentation).

Similar Messages

  • TS2446 I forgot the security question about what was my first car and what is my favorite car! What is the solution to change that? please help me, thank you in advance Leo

    I forgot the security question about what was my first car and what is my favorite car! What is the solution to change that? please help me, thank you in advance Leo

    If you have a rescue email address set up on your account then you can try going to https://appleid.apple.com/ and click 'Manage your Apple ID' on the right-hand side of that page and log into your account. Then click on 'Password and Security' on the left-hand side of that page and on the right-hand side you might see an option to send security question reset info to your rescue email address.
    If you don't have a rescue email address set up then go to Express Lane  and select 'iTunes' from the list of 'products' in the middle of the screen.
    Then select 'iTunes Store', and on the next screen select 'Account Management'
    Next choose 'iTunes Store Account Questions' or 'iTunes Store account security' (it appears to vary by country) and fill in that you'd like your security questions/answers reset.
    You should get an email reply within about 24 hours (and check your Spam folder as well as your Inbox)

  • Dm4-1060us laptop SD Card Reader 5-in-1 question. Does it work with SDHC and SDXC memory cards?

    dm4-1060us laptop SD Card Reader 5-in-1 question. Does it work with SDHC and SDXC memory cards?

    This cart reader is a kind of multi card reader and you can use different cards with it. In my opinion every multi device should be used very, but very gently. I do not know what happened exactly in your case but maybe you have damaged something inside.
    Try to restart your notebook and use other SD card to check if everything works well. Please do it very gently and if you see something is wrong stop with inserting the card.
    I use 1 GB SD card on my A200 without any problems.
    In my opinion you should check notebook by technician.
    Bye and good luck!

  • Difference between nio-file-manager  and nio-memory-manager

    Hi,
    what's the difference between nio-file-manager and nio-memory-manager? The documentation doesn't really discuss the differences as far as I know. They both use nio to store memory-mapped files don't they? What are the advantages/disadvantages of both?
    When to choose the first one and when the second when storing a large amount of data? Can both be used to query data with the Filter API? Are there size limits on both?
    Best regards
    Jan

    Hi Jan,
    The difference is that one uses a memory mapped file and one uses direct nio memory (as part of the memory allocated by the JVM process) to store the data. Both allow storing cache data off heap making it possible to store more data with a single cache node (JVM) without long GC pauses.
    If you are using a 32 bit JVM, the JVM process will be limited to a total of ~3GB on Windows and 4GB on Linux/Solaris. This includes heap and off heap memory allocation.
    Regarding the size limitations for the nio-file manager Please see the following doc for more information.
    With the release of 3.5 there is now the idea of a Partitioned backing map which helps create larger (up to 8GB of capacity) for nio storage. Please refer to the following doc.
    Both can be used to query data but it should be noted that the indexes will be stored in heap.
    hth,
    -Dave

  • Questions about the future directions of InfoPath and Microsoft Access

    Because I have been confused about the future directions of InfoPath and Access, I wrote a short blog post, which I have pasted below.  My question is, can Microsoft provide some more guidance on Access vs InfoPath?  If Access is indeed the
    the future direction, can you please provide some pointers to resources that can help us transition.
    A Short Review of MS Access,  SharePoint ,InfoPath (2013)
    After the November 2012 SharePoint Conference in Las Vegas (#spc12) there were a number of blog posts and people saying that Access 2013 was great and would be replacing InfoPath.
    Marc Anderson and
    Ruven
    Gotz have short posts summarizing #SPC12 and touch on the subject of InfoPath and Access.  I also spoke with several individuals shortly after #SPC12 and they were excited about Access 2013.
    Since I rely heavily on InfoPath for much of what I do, I wanted to kick the tires and see what everyone was talking about.  First, a few notes about SharePoint 2013 and Office 2013.
    Microsoft should rename Access:  If you have tried to
    bing the word Access, then you know that the search results are overwhelming,  because the word "access" is used for so many other purposes.
    Use the RTM version of Office 2013! I was performing  my investigations by leveraging the Office 365 Beta and the Office Applications that come with it.  Not much was working!  After I uninstalled the Beta
    version of Office 2013 and Installed the RTM version everything seemed to work. 
    Windows 7 and IE 9.0: The drag & drop that is being touted as
    "manna from heaven" seems to work well with Firefox, Safari, Chrome, and IE 10, but it does
    not work with IE 9!
    Non Microsoft browsers are still second class citizens (except for the drag & drop):  Microsoft has finally done away with the Active X's for datasheet view (that is brilliant!)  One can now see the newly
    minted datasheet view in many browsers.  But I still find that one needs to be in IE to do a number of key manual opeartions.  For example pasting numerous rows of data from a spreadsheet into the new sheet view works only in IE.
    Access 2013
    Microsoft Access is touted as a non developer tool.  I know a number of people who are on the business side and love Access.  These people will like the renewed energy that Microsoft has applied to Access.   One should note that conceptually
    this functionality existed  in SharePoint 2010.  Here is what I see that is new:
    +The new version works better:Although I haven't tested it fully, it seems that many more features that work on the Desktop version of Access, now work in the published Web Application which is hosted by SharePoint 2013.
    +The new version has fairly robust browser based forms: End users can now fill in data using forms that are rendered in the browser.
    +The published version that resides in SharePoint now uses its own SQL server tables.  So the engine appears to be SQL Server, not a modified version of Access built for a server.  This stands to be quite robust, but I imagine
    that some quirks will surface due to new model.
    The limitations are:
    - Access is pretty much its own application and does not integrate with SharePoint building blocks.  For example, an Access table is not easy to integrate with a SharePoint workflow.  Further, although  Access forms now are visible
    in a browser, they are not nearly as rich as InfoPath forms.  InfoPath forms cannot easily integrate with the Access tables.  In order to integrate SharePoint features and Access, one needs to tie SharePoint list(s) to Access as data sources. 
    This overcomplicates the model and one may very well run into synchronization issues.
    In short, although I believe there will be some people who will be happy with newly minted Access, I do not think that Access will be able to replace InfoPath and Workflow technologies.  I do agree that Microsoft does not seem to have put much energy into
    InfoPath.  If they leave a vacuum in this space, then others may very well take over, for instance Nintex Forms.

    Although I agree with the comments made by Ruven and Marc after the conference please note that those blog posts are their own personal opinions and that they don't work for Microsoft.  A lot of people have asked Microsoft to clarify the future of InfoPath
    and the response up until now has been a deafening silence.  In my opinion speculations about Access replacing InfoPath are premature.
    I should also point out that most of your comments about Access 2013 above are actually about Access Services in SharePoint Server 2013.  Access Services are NOT Access they are a shared service offering in SharePoint that convert and publish Access
    databases and forms.  As you point out once an Access database is published through Access services it is converted to SQL Server and no longer resides in Access.  Of course I don't work for Microsoft either so these are all just my personal opinion. 
    Having said that I doubt you will get the confirmation/response that you are hoping for from any official Microsoft channel.
    Paul Stork SharePoint Server
    MVP Principal Solutions Architect: BlueChip Consulting Group
    Blog: http://dontpapanic.com/blog
    Twitter: Follow @pstork
    Please remember to mark your question as "answered" if this solves your problem.

  • Questions about free Download Oracle 10g, Database and Developer suite

    Hi everyone, got some questions..
    1) Is it possible to download free Oracle 10g and Developer suite? is a 30 day license trial or something like that?
    2) On windows systems which are the minimun requirements?, for example in a Pentium 4, 512Mb RAM, Windows XP Home edition is OK?
    3) Should I download Standard Edition? Personal?
    4) If I am trying to update my Oracle Developer knowledge (I was developer on 1999 with Oracle 7.3 and Developer 2000) what products do I have to install?? Oracle DB 10g, Developer Suite,Application Server too?, what else?
    Thanks guys!
    J.

    My answer you could find here Questions about free download Oracle 10g, Developer Suite

  • Question About Sharing Apps Between My iPhone and My Wife's iPhone

    Hi, I have a question about downloading apps to my iPhone.
    I ordered two iPhone 3g's - one for my wife and one for me, and I've discovered that when I download an app (even free ones) on my iPhone and then later sync it to iTunes, my wife cannot put it on her phone. However if I download it on iTunes on my computer and later sync it to my phone, then my wife is able to sync it to her phone as well. It's no big deal when they are free because she can just go get it if she wants it. I haven't purchased any apps yet, but is there a way to be able to give my wife apps that I purchase on my iPhone? Or do I need to purchase all of my [pay] apps and songs on iTunes on my computer to ensure we both have access? Or do I have it all wrong completely LOL?? This rights management stuff is confusing.
    Thanks in advance for your help,
    Jimmy

    I had my iTunes account and phone before I got my wife's hers. When I first started, I synced hers from her account on my computer brought in my libraries and authorized her phone as one of the 5 allowed. She had all purchased apps and music. Over time we each bought music or apps on our seperate accouts. Of course, we told each other about cool apps or music we bought and wanted on our phone. When I went to sync iTunes was going to delete all music and apps and sync with the library I was logged into. Didn't want that, only work around I have found is to copy new music or new apps from one library to the other. Updating on the phone is also difficult because you can't switch between accounts so updates have to be done at the computer for apps bought under different accounts. I am sure there is a better way to do this and ask for an insight anyone would have. I hope it works out.
    Message was edited by: AfoUare for typos

  • Question about how a RAC database connects to ASM

    I have recently installed Grid Clusterware 11.2.0.1 on an IBM PSeries server running AIX. Today, I installed the Oracle database software, version 11.2.0.1, but when I try to start the database, I get an error message: ORA-01031: insufficient privileges.
    I can log in to the ASM instance using "sys as sysdba" but when I try to log in to ASM as "sys as sysasm" then I get the same error message.
    Obviously I have configured something incorrectly. I would appreciate any help locating the proper documentation so I can correct my errors. All advice is greatly appreciated. Thank you.

    Hi,
    Regarding the AIX group "asmdba", we do not have separate administrators to handle the administration of ASM in 11g. I read in the documentation (Grid Infrastructure Installation Guide) that if separate administrators are not wanted for ASM and the database(s), then "asmdba" group is optional. Would you recommend creating this group anyway?I agree to create OS group asmdba it's mandatory only if you are using different user to GUI Install.
    But it's a question of organization of the environment. Each group will designate different kinds of permissions and different roles.
    So, Although the ASM come built into Oracle Database (actually 11.2 and higher Oracle has created a new layer called Grid Infrastructure), Clusterware, ASM and Database products are completely different for different purposes. With the evolution of these products believe that the tendency is they have their own installation and administration. Yet all will work together.
    Create a group asmdba will not impact the current environment, only will help keep the environment more organized to the future. Look on the bright side, if one day you need of group asmdba, you does not need to re-configure the environment.
    Correcting my previous post the group that has permission to access as SYSASM privilege is asmadmin instead of asmdba.
    Cheers,
    Levi Pereira

  • A Question about Windows games with boot camp and system requirements

    I don't plan to play many games on my Mac, but after seeing what can be done with it, I've been entertaining the idea of picking up a Windows game or 2 to play in Boot Camp (considering picking up a XP PRO with SP2 for this).
    My question is about the listed systed system requirements and how they might apply to my Mac Pro. I have a dual 2.26.
    As a specific example, I was looking at the game Fallout 3. The box lists a 2.4ghz processor required but I've read on this forum about people running it great with less on their Mac.
    So I was wondering what I would need to consider when looking at those requirements or if games in that range do indeed run well...

    Thanks Kap, you're always helpful.
    That's exactly what I was wondering. How the requirement on the box applied to having an 8 core at a lower clock speed.
    I was looking at XP home at amazon and newegg, but haven't been able to tell if they are 64 or 32 (unless that means just install that version from the disc).
    It's nothing pressing, just something I was entertaining for now.

  • Data Backup 2.1 and Mac Memory Management?

    I'm trialing a backup program called Data Backup 2.1. It keeps versions of my programs, which I need, as often I've had corruptions and have not notice this till a few days after the fact. I've been using Retrospect but read a review that praised Data Backup. The thing I've noticed with it is that although it is very fast, like SuperDuper, it seems to affect my free memory dramatically. I've noticed that it will finish and instead of having say 250 megs of Active memory in use I'll have 700 megs of active memory. Inactive will be low whereas normally its high. Free memory during its backup can drop to 20 megs (I have 1.5 gigs). The free memory, once you start to use your computer seems to recover to around 500 - 700 megs. The one thing I have noticed of concern is that while its running I get pageouts, which I never get and my reading about Mac memory management is you want to avoid pageouts and if you get them you need more memory (for what I'm doing 1.5 gigs should be plenty). I've asked the Data Backup people what's going on and they don't think its something to be concerned about but they said it is probably something to do with the way they are caching.
    I'm just wondering - do you think this is something to be concerned about. I'd like to switch from Retrospect as although I know it I'm not sure how committed they are to the Mac market any longer and it is way slower in terms of activities but it does manage memory well. However I don't want to get Data Backup if it is affecting RAM inappropriately.
    Kerry

    Synchronize! Pro X will maintain versioned archives, perform full, incremental, and bootable backups both to local and to network devices. I have found that SPX is just about as full-featured as Retrospect with certain limitations. It cannot backup across multiple media (CDs, DVDs, tape), no extensive browser windows like Retrospect, no backups without scanning (as SuperDuper does for its "fast" updating backup.
    SPX supports schedules, multiple-item backups (can select individual files and/or folders), extensive backup/synchronize customizations, can run as "root", can auto-mount devices (including network drives), and it's a universal binary.
    It's also nearly as expensive as Retrospect but in my opinion it's worth it.
    If you want a less costly backup solution without all the features of SPX, but with all the features of SuperDuper (and in my opinion better than SD) then try Deja Vu. Also a universal binary, it supports incremental archives, full, incremental, and bootable backups to local or network drives, supports scheduling and runs as a preference pane.
    Finally, for the the truly cheap there are PsyncX and RsyncX - both freeware. They are GUI wrappers around the basic backup and synchronizing tools that are part of Unix (ditto, rsync, and psync.)
    Download mentioned software from www.versiontracker.com or www.macupdate.com.
    Why reward points?(Quoted from Discussions Terms of Use.)
    The reward system helps to increase community participation. When a community member gives you (or another member) a reward for providing helpful advice or a solution to their question, your accumulated points will increase your status level within the community.
    Members may reward you with 5 points if they deem that your reply is helpful and 10 points if you post a solution to their issue. Likewise, when you mark a reply as Helpful or Solved in your own created topic, you will be awarding the respondent with the same point values.

  • Questions about Using APIs to import Bills and Routings - AND COSTS

    Hi Forum - the following is a back-and-forth with a customer about use of APIs - Inventory developer suggested I post the question here. Note the 2nd question - and thanks for any assistance.
    SR# 7332152.994 ALCOA
    Instructions given to ct:
    Q1 - Can I load the bill header and components at the same time?
    You should be able to load the bill header and components at the same time. Customer loads bill and component data inserting enough "other" data for each so that the bill sequence id will be derived. For the component record, the assembly item, org and alternate_bom_designator values will be used by BMCOIN to derive the bill_sequence_id.
    Example:
    INSERT INTO BOM_BILL_OF_MTLS_INTERFACE
    ORGANIZATION_CODE,
    ITEM_NUMBER,
    ALTERNATE_BOM_DESIGNATOR,
    PROCESS_FLAG,
    TRANSACTION_TYPE
    VALUES
    'M1',
    '&PARENT_ITEM',
    NULL,
    '1',
    'CREATE'
    INSERT INTO BOM_INVENTORY_COMPS_INTERFACE b
    ORGANIZATION_CODE,
    ASSEMBLY_ITEM_NUMBER,
    ALTERNATE_BOM_DESIGNATOR,
    COMPONENT_ITEM_NUMBER,
    OPERATION_SEQ_NUM,
    COMPONENT_QUANTITY,
    EFFECTIVITY_DATE,
    PROCESS_FLAG,
    TRANSACTION_TYPE
    VALUES
    'M1',
    '&PARENT_ITEM',
    NULL,
    '&COMPONENT_ITEM',
    1,
    1,
    trunc(SYSDATE),
    1,
    'CREATE'
    Hi Aruna, some additional information that may be useful:
    We can load/create the bill header and components at the same time using the scripts given (as above)
    Required Data for Creating a Routing : assembly_item_id,
    organization_id, routing_type, transaction_type, process_flag
    And following scripts can be used to load routing header and operations equences.
    INSERT INTO BOM_OP_ROUTINGS_INTERFACE
    (assembly_item_id,
    organization_id,
    routing_type,
    transaction_type,
    process_flag)
    VALUES (2255800,207,1,'Create',1);
    INSERT INTO BOM_OP_SEQUENCES_INTERFACE
    (assembly_item_id,
    organization_id,
    operation_seq_num,
    Department_code,
    effectivity_date,
    transaction_type,
    process_flag,
    operation_description)
    VALUES
    (2255800,207,100,'ASSEMBLY',
    to_date('24-FEB-2009'),'Create',1,
    'Paint Wagon');
    Q2: One more question, can an expense item can be added to the bill and can contribute the cost.
    As there is a confusion of what I asked, below I am rephrasing my question
    By an Expense Inventory Item, I mean an item that is just tracked for quantity only i.e.,Checking the attributes - Inventory Item, Stockable, Transactable under Inventory Tab and not checking the attribute - 'Inventory Asset Value'.
    My question here is, For these Expense Inventory Items, What is the difference between having the 'Costing enabled' attribute turned ON as opposed to having it UNCHECKED
    *Q3 I have tried to load the items and I could only load 1st level of components but could not load second level of bom at the same time.
    While inserting I have inserted plan level too.
    Please let me know if I have to do anything different to load second level.*
    Thanks
    James

    You may want to look at using the more4apps bill of materials wizard, an excel based solution for uploading assemblies and their components.

  • Question about drawLIne(x1,y1,x2,y2) and repaint()

    i am doing this project, which i suppose to use drawLine and repaint() to generate graphs. my problem is, every time i hit a new button it will call the repaint() then my old graph is gone, only the new graph is left.
    for example
    i have 4 buttons. movesouth() movenorth() moveeast() movewest()
    when i hit movesouth two times there should be a staight line, when i hit movewest() my old graph is gone() it only left me with 1 unit to west cuz i have repaint() inside my actionPerformed function, my question is: is there a way that i can redraw these line without calling repaint () ? cuz repaint is kinda like redraw the new stuff and forget about the old ones, however i would like to keep the old one while adding the new graph to it.
    your suggestions would be great appreciated.

    well of course, your Graphics-Object is of the type Graphics2D, you just need a cast so that the compiler is happy ;-)
    Its the same Graphics2D object/instance as withought the cast...
    lg Clemens

  • Question about interface for recording electric guitar and vocals

    Ok, I've been messing around with Garageband all day, totally stoked and I'm ready to get into it. Right now I'm using a First Act quarter inch plug to USB cord to hook up my guitar and start recording and after some messing around I got it to work.
    Here's my question... to really make quality recordings, what's the best way to hook up the guitar? Is the way I'm doing it now fine with the USB cord or is some sort of interface better? Can someone recommend one that's on the cheap side? Also, I haven't tried yet, but what's the best way to record vocals? Should I invest in a USB mic? Can anyone recommend one? I have a Shure SM58 already, what's the best way to hook that up?
    Really excited about this, can't wait to start cranking out some songs!
    PS: When I use the USB cord, I don't see any way to control the recording level, and sometimes I get a Feedback control warning. How can I lower the level so I don't get that? Thanks!
    Message was edited by: xSlamx

    I have a total now of 4 interfaces - I recently purchased a FOCUSRITE SAPPHIRE 6 USB - it's amazing quality and I only paid $149 for it at my local Guitar Center. I use it with my Guitar and everything sounds fantastic - they say the preamps are really high-quality for Mics too... I recommend it. I have a firewire interface too but the Sapphire is my man baby now - don't let the USB 1.1 fool you - it works flawlessly with my Mac and my Windows 7 machine too. It also comes with a selection of software including Ableton Live Lite and 4 really nice Focusrite plug-ins too.

  • Some questions about 11gR2

    All,
    I just upgraded to 11gR2. But now voting disk and ocr are all in ASM. How do i do voting disk backup?
    We used to use dd to backup voting disk, now i got
    [oracle@np-testrac1 ~]$ crsctl query css votedisk
    ## STATE File Universal Id File Name Disk group
    1. ONLINE 3c7b31b208de4f2cbfa98ea010216a1a (ORCL:ORC) [CLUSTER_OCR]
    Located 1 voting disk(s).
    It is inside the ASM.
    And i only see one file, i am expect to see two files, one for OCR, one for voting disk
    Did i do something wrong?
    Thanks

    In Oracle Clusterware 11g release 2 (11.2), you no longer have to back up the voting disk. The voting disk data is automatically backed up in OCR as part of any configuration change and is automatically restored to any voting disk added.
    please refer :
    http://download.oracle.com/docs/cd/E11882_01/rac.112/e10717/votocr.htm#BABDJDHI
    Regards
    Rajesh

  • Question about HP 2311xi - auto-switch source and delay wakeup from sleep

    I recently purchased this monitor and noticed that when it wakes from sleep it will take about 5-10 seconds for it to wake whereas other monitors I've owned they have gone on immediately.  I was just wondering if this is how this monitor is or if I have an issue with it.  
    Secondly, how is the auto-switch source suppose to work?  I have my PC set to DVI and I have the default source set to my 360 through the HDMI connection.  I would assume that when the 360 goes on it would go to the default source and switch over to the hdmi connection.  However, my monitor does nothing.  What does the auto-switch source actually do or is mine just defective?  
    Thanks in advance for any help on this monitor.  
    This question was solved.
    View Solution.

    Auto-switch source only works if there is no signal as it detects the port with a signal and auto switches to that port.  However, the monitor has no way of knowing exactly which port the user wants when two signals are present.
    Default port setting is what the monitor will look for first when being turned on and doesn't necessarily give that port override capabilities. 
    Taking 5-10 seconds can be normal.  My third-party monitor at home generally takes about 5 seconds before displaying a signal, but this may have more to do with the HDMI connection (I haven't tested this with the VGA port).  I don't believe this is a cause for concern. 
    Let me know if I answered your questions. 
    ↙-----------How do I give Kudos?| How do I mark a post as Solved? ----------------↓

Maybe you are looking for