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  • How can I see if my server uses DDRII or DDRIII RAM?

    - by Temnovit
    I have a very newbie question. My server is running out of RAM and it is time to add some. The is located far away, and I need to buy some RAM and drive to install it. How can I determine, whether I need to buy DDRII or DDRIII, having only command line access via SSH? Is there some command that will print witch kind of RAM is supported by the server or I need to go and check the server physically? UPDATE Sorry, forgot to mention: I am using Ubuntu Server 9.04

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  • How do you interpret `strace` on an apache process returning `restart_syscall`?

    - by indiehacker
    We restart an apache server every day because RAM usage reaches its limit. Though of value See this serverfault answer, I dont think lowering the MaxClients in the apache configuration is a solution to the unknown root problem. Can you make sense out of the below data? Below is an extract of what $top with M returns: 20839 www-data 20 0 1008m 359m 22m S 4 4.8 1:52.61 apache2 20844 www-data 20 0 1008m 358m 22m S 1 4.8 1:51.85 apache2 20842 www-data 20 0 1008m 356m 22m S 1 4.8 1:54.60 apache2 20845 www-data 20 0 944m 353m 22m S 0 4.7 1:51.80 apache2 and then investigating a single process with $sudo strace -p 20839 returns only this one line, which is cryptic, for me: restart_syscall(<... resuming interrupted call ...> <unfinished ...> Any insights? Thanks.

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  • Assembling a number-crunching computer [closed]

    - by tugrul büyükisik
    What is needed to make a GPU fully fed by CPU? Comparing their flops/s is enough? For example, if i could manage to make a very old(pentium-3) CPU with one of Nvidia-Fermi GPU, it would not be able to fed the gpu with data per sec. What is the criteria to fit CPU to GPU exactly when OpenCL or some similar work needed? Of course RAM and BUS will be chosen in a similar way but how exactly? Assume each GPU-core will calculate a sqrt and a division and an adding for 100 times for every itearation. Thanks.

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  • Does the Dell Inspiron 1501 handle more than 4 Gb of RAM?

    - by zillion
    After the following comment on my last question, I'm thinking about upgrading my RAM: I got a 160 GB Scorpio Blue a couple months ago for my 1501. It's nice. That + 2 GB Crucial RAM have rather revived my notebook (meaning a very nice speed and storage boost). I was outgrowing it... – Nathaniel What would be the best choice to add more RAM? I've already got 2 GB, but I'm not sure what their speed is. What are the size, type and speed limitations for RAM on my particular laptop?

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  • BIOS says 8GB RAM installed but only 6GB is available

    - by Hiroshi
    my machine is a Dell Studio XPS 9100 with 8GB of RAM installed. When I open the BIOS setup and enter the System Info, it shows that my machine got 8GB of RAM installed but only 6GB is available (yes this is from the BIOS only). In Windows 7 (64bit Pro) it shows only 6GB of RAM are available. But if I run CPU-Z then it can detect all 8GB RAM. The machine came pre-configured and I have never opened the case before.

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  • If I double my ram on a x86 processor, does that double the ram I can use for each individual process?

    - by Derek Reitz
    I don't understand how 32-Bit OS's use RAM on a per process basis. I've read the max RAM my x86 processor running a 32-bit OS can use is 2^32 = 4gb; but that's just for one process, right? 3DS Max keeps crashing, but it typically can never use more than 2GB of RAM before it crashes, if I increase my RAM from 4-8GB, would that double how much RAM I can use for each individual process or actually cause no change in my performance? Also would increasing my VRAM and getting a better graphics card increase the extent to which individual programs can preform? Lastly, is there any way to upgrade a 86-bit processor to be able to run a 64-bit OS? I feel like it would be ridiculous to sell modern processors that are capped at 4GB of RAM? Thanks. Quad-Core Intel i7 Q 720 @ 1.6GHz

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  • memtest86+ crashing on server

    - by user148723
    we have a few DELL 1950 servers. 1 of this servers has CentOS6.3 and its randomly rebooting so I suspected it was hardware. (no log generated) the other 4 servers do not randomly reboot. We passed memtest86+ on the 5 servers, and on 3 of them memtest86+ crashes (displaying an odd and colorful screen, like if a video card failed) Although I tested old memtest86 (not +), and all servers did not crash. I also tested other RAM testers utilities, no tool failing. have any of you guys experience this? thanks

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  • Should I buy more RAM for my computer or a better CPU?

    - by Reijer The Coder
    I have recently bought a new laptop, an ASUS N56VJ-S4149H. I bought it to use it in all possible ways I could want, so that would be gaming downloading and streaming movies browsing the web and programming software. So far it has been running great but one thing annoys me a little bit. I frequently play Mount&Blade: Warband, it's a great game and you should check it out. Everything runs smoothly but only when I turn down the 'Texture Detail'. Otherwise it will lag a lot and I can't really play. Now my question is: Is this a problem of not enough RAM? At first I was really sure it was but after thinking about for a while I'm not anymore. My computer only has 4 Gigabytes of RAM and there is still a slot open. So will it improve when I buy another 8 Gigabytes? EDIT: It has an Nvidia GeForce GT 635M inside. and an Intel Core i5 3230M CPU with 2,6 GHz. Help and answers are really appreciated. Thanks to all.

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  • What does CPU Time consist of?

    - by Sid
    What does CPU time exactly consist of? For instance, is the time taken to access a page from the RAM (at which point, the CPU is most likely idling) part of the CPU time? I'm not talking about fetching the page from the disk here, just fetching it from the RAM. Thanks

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  • Building a workstation computer for Image processing? [closed]

    - by echolab
    I am taking a gigapixel image my goal is 50gigapixel and shooting is almost done , i am doing some research to build a workstation so i can stitch images together , my questions is ! Could u suggest some dual cpu mainboard that works fine with xeon 5500+ , with 64GB+ ram support ? My other question is which hardware is most important in image processing , all i see in story of gigapixel panoramas is they have dual xeon and 32gb+ ram ? i wonder if i am doing this right , i mean they don't post information on graphic card , mainboard and stuff ! I did asked several websites , but nothing best answer was get some high-end workstation and plenty of hours , i don't want to purchase ready to use workstations, i wanna build it up Thanks in advance

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  • Ram not working in dual dynamic paging mode

    - by Robin Agrahari
    My motherboard is Intel D865GVHZ I m using 512 mb ram and recently i purchased a 512 mb ram of same company same speed(333) and same manufacturer. but my pc is not booting in dual dynamic paging mode . It is not at all booting and the screen freezes on windows logo screen at start up. i checked installing individual rams one by one and the pc is working with either of the ram installed individually. But wen i install both the pc is not working. One more point i found is my one ram has 8 chips on both sides while the other ram has 4 chips on both sides. Is that the root of the problem ?? plz help sir. in hope robin

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  • Recommendations for SSD for server and database use?

    - by Tony_Henrich
    SSDs are a new technology and they are constantly improving. A lot of the posts here were posted in 2009 when SSDs where less mature and not as fast. What was recommend back then is probably out of date today because of better options. The SSD is used to hold SQL Server databases. Size is probably 128G. The database is used with a CMS and web server so web pages need to get their data and render as fast as possible. Which modern SSD is recommended for such a use? Is there an SSD better than Intel X-25 E/M in terms of performance/cost? (I am also evaluating cost between : RAM + UPS (semi persistent) vs SSD for same amount of gigabytes. No RAID is involved)

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  • What is shrink_slab, and why is it showing up in /var/log/messages?

    - by Steve Kehlet
    I'm investigating some application issues on a Linux system and noticed this around the time of the most recent problem, but not close enough to be definitively related: Jun 7 17:51:49 localhost kernel: shrink_slab: nr=-155456000 Jun 7 17:51:49 localhost kernel: shrink_slab: nr=-157859400 Jun 7 17:51:49 localhost kernel: shrink_slab: nr=-157833400 Jun 8 06:20:23 localhost kernel: shrink_slab: nr=-284172800 What is this? Googling isn't helping, I get that it's something with VM, but why is it suddenly showing up in /var/log/messages? Edit: I take it it's showing this because the number of pages it could free ("nr") is negative. Which is presumably a bad thing. I found patches for newer kernels that display a more useful message to this effect. Still not sure what this means though, or what I need to do about it.

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  • RAM upgrade, what options are suitable?

    - by user55150
    I have a Dell GX520 optiplex model (mini tower), and I want to upgrade its RAM. I currently have 1GB RAM and I want to upgrade to 2GB. All I know about RAM is its capacity, and I've heard about speeds lately like 400mhz, 533mhz, 800mhz, 1333mhz. I want to know what are the differences among them and can my PC support all those types of speeds or not? And what is the most suitable one for my Dell PC, to avoid any problems or limitations.

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  • Sharing RAM resources between 2 or more computers

    - by davee44
    I know there was a somewhat similar question before: How to share CPU or RAM? But, let me just specify it a little more... When Microsoft Windows requires more RAM capacity than available it uses a swap-file to temporarily store the data there, this is actually something like a hard-drive-based RAM. This technology is used for many years. Theoretically, it shouldn't be too hard to implement a similar technology that uses the RAM of different computer(s) in the network for temporary data storage. This just requires a software that runs on computers in the network that accepts and returns data from/to the main computer and keep that data in the RAM; plus the operation system of the main computer must have the ability to use computers in the network instead of (or in addition to) the swap-file. I wonder, are there any implementations of this idea? This would allow users to build RAM clusters using all of their home or office computers, that will boost the performance of a single computer for some development/gaming/video tasks, etc.

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  • What is lightweight lock in distributed shared memory systems?

    - by Kutluhan Metin
    I started reading Tanenbaum's Distributed Systems book a while ago. I read about two phase locking and timestamp reordering in transactions chapter. While having a deeper look from google I heard of lightweight transactions/lightweight transactional memory. But I couldn't find any good explanation and implementation. So what is lightweight memory? What are the benefits of lightweight locks? And how can I implement them?

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  • Minecraft server hosting hardware specifications [on hold]

    - by Andrew Wright
    I am planning on purchasing a server to rent off Minecraft game servers, largely to friends. I am planning on purchasing a 128GB RAM server to save on colocation costs (as I am likely to need more than 32GB and would have to rent 2U of space...) I am hoping for some advice about the processing power needed to deal with this level of RAM. The servers will be run in a shared environment on linux in a VM to make backups easier. The server I have in mind is dual CPU. I have been considering at the low end dual Xeon E5-2609V2 Quad-Core 2.5Ghz, and at the high end dual Xeon E5-2650V2 Eight-Core 2.6Ghz. The difference between these is 6.4 GT/s and 8 GT/s and £3000 for the lower spec server, £4300 for the higher spec. I was hoping I could get advice about whether it is worth paying for the extra/higher speed processor or if I would be wasting my money? Thank you for any help - I appreciate that this is not directly related to professional system administration.

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  • I have 4 GB RAM, but the system only reports 3 GB? [closed]

    - by RawR Crew
    Possible Duplicate: Windows 7 64-bit is only using 3 GB out of 4 GB My HP HDX 16 laptop has 4GB of ram and runs a 64-bit system. I always go into Dxdiag for some reason and i always see it says 4096 MB of RAM. But today I felt the PC was misbehaving, so i opened it and it said 3128 MB of RAM. Where did that 1 GB go?? When I check the computer properties, it says I'm using a 64-bit system with 4.00GB of RAM, but why does everything else say it has 3?

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  • How to monitor RAM usage for Hyper-V VMs ?

    - by Mac
    A bit of context first : on Windows 2008 Standard x64 with 8Gb RAM, I have 5 VMs running which should take up 1664Mb RAM (3*256Mb+384Mb+512Mb). There is nothing else running on this server except the basic OS components (this not a Core installation). I know that each VM will use more RAM on the host than what has been configured in Hyper-V. But when I run the task manager, it says 6.7Gb used ! If I sum up the RAM used by each process in the task manager (showing all users processes), I get to something around 1Gb... So : how can I check how much RAM each VM is really using on the host (it does not seem to be available via task manager) ? Note that I am aware of the fact that my problem could be unrelated to VM RAM usage, but I would still very much like to know how to do this.

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  • Microsoft sort SQL Server 2014 CTP 2 et vante ses nouvelles capacités In-Memory permettant d'accélérer 30 fois les performances

    Microsoft sort SQL Server 2014 CTP 2 et vante ses nouvelles capacités In-Memory permettant d'accélérer 30 fois les performancesMicrosoft a profité de son salon Pass Summit 2013 dédié à SQL Server pour dévoiler la CTP 2 de sa plateforme de gestion de données moderne SQL Server 2014.SQL Server 2014 est conçu autour de trois objectifs majeurs : offrir un système de base de données « In-Memory », de nouvelles capacités Cloud pour simplifier l'adoption du Cloud Computing pour les bases de données SQL...

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  • Mystery process crashing machine by using all of the RAM - how to identify?

    - by wd40
    I have a Linux machine which runs ~10 in house written processes. Every other day(!) the machine completely runs out of RAM, goes into swap and becomes unresponsive. This happens quickly over a period of a couple of seconds, so it's not feasible to sit watching the machine until it dies. It's a sudden leak, not a gradual one, so top(1) doesn't give any indications something bad may about to happen. What is the best way of identifying which process(es) are causing the trouble?

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  • Could 1 GB of RAM work better than 1.25?

    - by user67082
    This is for a server running Ubuntu Server 10.10. The server is an old desktop PC. It had 2 sticks of 256 MB of 182-pin DDR 400 MHz RAM in it (total 512 MB of RAM). I just ordered a 1 GB stick of compatible RAM for the machine (now would have a total of 1.25 GB of RAM). A friend told me that it might run better if I removed both sticks of 256 MB RAM and used just the 1 GB stick I will be receiving. This seems counterintuitive since then there would only be 1 GB of RAM instead of 1.25; is it possible that it would be better to run with 1 GB or is he totally wrong? Thanks for the help.

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