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  • Oracle Exadata X3 announcement at Oracle Openworld

    - by Javier Puerta
    Oracle Announces Oracle Exadata X3 Database In-Memory MachineOracle Press ReleaseFourth Generation Exadata X3 Systems are Ideal for High-End OLTP, Large Data Warehouses, and Database Clouds; Eighth-Rack Configuration Offers New Low-Cost Entry Point During his opening keynote address at Oracle OpenWorld, Oracle CEO, Larry Ellison announced the Oracle Exadata X3 Database In-Memory Machine - the latest generation of its Oracle Exadata Database Machines. The Oracle Exadata X3 Database In-Memory Machine is a key component of the Oracle Cloud. Oracle Exadata X3-2 Database In-Memory Machine and Oracle Exadata X3-8 Database In-Memory Machine can store up to hundreds of Terabytes of compressed user data in Flash and RAM memory, virtually eliminating the performance overhead of reads and writes to slow disk drives, making Exadata X3 systems the ideal database platforms for the varied and unpredictable workloads of cloud computing. In order to realize the highest performance at the lowest cost, the Oracle Exadata X3 Database In-Memory Machine implements a mass memory hierarchy that automatically moves all active data into Flash and RAM memory, while keeping less active data on low-cost disks. With a new Eighth-Rack configuration, the Oracle Exadata X3-2 Database In-Memory Machine delivers a cost-effective entry point for smaller workloads, testing, development and disaster recovery systems, and is a fully redundant system that can be used with mission critical applications. Detailed info at Oracle Exadata Database Machine

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  • Home server - HP Proliant Microserver - Software and setup - OS on USB stick?

    - by Lloyd Watkin
    I've just purchased a HP ProLiant Microserver for home use. I want to set up with web server, samba shares, the usual stuff. My question is really about system setup. It has an internal USB socket so I've attempted to install a copy of Fedora 14 onto it. I turned off X/Gnome, but it still ran like a pig. I've now put the OS on one of the internal disks (250Gb, 7200rpm), but I was wondering if there was a way to utilise the internal USB to give me better power-saving allowing the hard drives to be shut down when not in use. How would you set this server up? I'd rather not go to the extra cost of an SSD right now, but if that's the best way then so be it.

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  • 4 GB DDR2 vs 2 GB DDR 3...........

    - by metal gear solid
    I 'm going to purchase new PC. due to my budget limit either i can purchase 2 x 2GB = 4GB DDR 2 or 2 GB Single stick DDR 3. Will 2 GB DDR 3 will give almost same performane compare to 4 GB DDR 2? In future I will upgrade RAM upto 8 GB Which option would be better for me for now and why?

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  • Is bigger capacity ram faster then smaller capacity ram for same clock and CL? [migrated]

    - by didibus
    I know that bigger capacity hard-drives with the same RPM are faster then smaller capacity hard-drives. I was wondering if the same is true for ram. Given two ram clocked at 1600mhz and with identical CLs: 9-9-9-24. Is a 2x8 going to perform better then a 2x4 ? Note that I am not asking if having more ram will improve the performance of my PC, I'm asking if the bigger capacity ram performs better. Thank You.

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  • Tomcat - Persistent Object

    - by David
    I am running a servlet that recommends items based on a data model. The data model has to be loaded into an object from a database each time user makes a request to the sever and since the data is the same for all the users I would like this object to be loaded once only. I am very new to Tomcat and don't know where to look so any advice will be appreciated. Thanks!

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  • Is there a rule of thumb for RAM upgrades?

    - by Retrosaur
    I'm having a hard time figuring out whether or not a certain laptop/computer's RAM can be upgraded or not. Is there a rule of thumb that determines how much max RAM one could add to a system without looking it up via external websites? A little bit of a background information: I work in computer sales at a computer electronics store, so it is virtually impossible for me to install any sort of software that would detect computer specs, and I get a lot of customers who wonder what laptop/desktop RAM upgrades usually are. Is there a certain rule that adding more RAM entails? Does it make a difference if it's a 32-bit or 64-bit machine? OS?

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  • Motherboard booting without RAM in Dimm1

    - by Jesus Ramos
    Is it possible to have a motherboard boot without placing RAM in the DIMM1 slot? Our new cooling solutions for motherboards are causing us issues where some boards that have RAM with raised heatsinks will not actually fit because the DIMM1 slot is partially blocked. Currently we mount the RAM in DIMM1 and DIMM3 because it's dual channel, are there any settings that can be changed on the BIOS to allow motherboard to boot without RAM in DIMM1 such as placing the RAM in DIMM2 and DIMM4?

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  • Using ddr2 and ddr3 together

    - by Noam
    I have a Gigabyte board called GA-EP45C-DS3. It has four DDR2 slots, and 2 DDR3 slots. I would like to use them in parallel, and achieve the result of 12gb RAM. Will it work? see: http://www.gigabyte.com.tw/Products/Motherboard/Products_Overview.aspx?ProductID=2870

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  • Using ddr2 and ddr3 together

    - by Noam
    I have a Gigabyte board called GA-EP45C-DS3. It has four DDR2 slots, and 2 DDR3 slots. I would like to use them in parallel, and achieve the result of 12gb RAM. Will it work? see: http://www.gigabyte.com.tw/Products/Motherboard/Products_Overview.aspx?ProductID=2870

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  • Strange Inode/Ram cache drops happening in CentOS

    - by FunkyChicken
    I run a CentOS 5.7 machine (64bit) with 24GB ram and 4x SAS drives in RAID10 setup. This machine runs nginx/1.0.10, php-fpm & xcache. About a month back the RAM usage of this machine has changed. About every few hours the 'CACHE' is flushed from the RAM, this happens exactly when the 'Inode table usage' drops. I'm pretty sure these drops are related. (see the 2 attached images). This server hosts quite a lot of small files (20M all a few KB big). Not many files are deleted (maybe 100 per hour (total size a few MB max)), not enough to account for the huge Inode table drops. I also have no crons running which could cause these drops. Sar -r output: http://pastebin.com/C4D0B79i My question: Why are these huge RAM/Inode usage drops happening? How can I get Nginx/PHP to use all of my servers RAM?

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  • System hangs after IncreaseUserVa change on Windows 7 64-bit

    - by imriss
    By mistake, I applied the IncreaseUserVa 3072 on a Windows 7 64-bit: BCDEDIT /set IncreaseUserva 3072 After that, the system is getting hanged when I start an intensive Matlab code. I tried to revert the change using both: BCDEDIT /set increaseUserva 2048 or BCDEDIT /deletevalue increaseUserva But, I get to the same problem when I run the Matlab code. When I check bcdedit/enum all, it does not contain increaseUserva, after /deletevalue command. Any idea?

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  • PHP memory_limit local value does not match php.ini value

    - by Buttle Butkus
    CentOS system. Summary: changed memory_limit in master and local php.ini and yet no change in the local value for a particular virtual host. Trying to improve performance, I set the memory_limit to 1024M in /etc/php.ini phpinfo() shows Master and Local values for other virtual hosts on the server as 1024M. Changing the value in /etc/php.ini changes all values, except one. One site is stuck with a local value of 256M. I thought I found the problem: there is a php.ini file (which I didn't know about) in that site's root, and it had memory_limit = 256M I changed it to 1024M. Problem solved? No. And now I don't know where to look. Obviously, I've restarted apache (/etc/init.d/httpd restart), and that usually does the trick. I also turned off APC cache, though I don't think it would cache ini files. And finally, I tried adding this to the virtual host in httpd.conf: php_value memory_limit 536870912 (yes, that would be 5 GB) And that had no effect whatsoever. What else could be the problem? Thanks.

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  • Why can't I boot in to Windows Recovery Environment to fix my HDD or salvage my data?

    - by Kevin
    I've been trying to get in to WindowsRE to salvage the files on my Sony Vaio laptop after it failed to load Vista (it finally, consistently displays "Error loading operating system" after months of such intermittent failures, usually rectified via restarts or utilizing Startup Repair or CHKDSK from WindowsRE) . The problem is, after successfully accessing it once after this failure (and many times before over the course of the laptop's life), I can no longer get it to load. During the last successful access (right after the failure), I ran startup repair, which itself failed and notified me that the boot sector was corrupt. I attempted to head in to Sony's proprietary recovery tools menu, which is accessible from WindowsRE when it is loaded from the recovery partition or recovery disk, however it hung. I have since been unable to access the recovery environment after restarting, using any of these methods: Access via the recovery partition (pressing F10 on boot) Access via recovery DVD (created using the same computer when it was healthy) Access via a Windows Vista installation DVD All three methods produce the same results: The computer acknowledges the boot attempt The computer successfully gets passed the "Windows is loading files" screen The computer successfully gets passed the Windows loading screen The computer then stalls at a black screen, while showing HDD activity (via indicator light). After a few minutes, the HDD activity ceases, and after a few more minutes, the over sized cursor that is utilized in WindowsRE appears on the black screen. The actual recovery environment, however, never appears, even after leaving the computer in such a state overnight. What is fustrating is that other bootable utilities, such as SeaTools for DOS and MemTest, boot up and run fine. In running perfectly normally, MemTest was able to produce a plethora of errors utilizing my RAM. I'm inclined to believe the RAM's faultiness may causing the WindowsRE booting to fail. Would this be a valid assumption? If I'm not mistaken, booting from external media utilizes the RAM, so such a reason is plausible, assuming my knowledge of bootloading is correct. Other than that, I can't figure out any reason why all the bootable utilities except WindowsRE run fine. Does anyone know what the problem is, or could be? Any solutions?

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  • Adding more RAM at different speeds? Will it impact performance as much as to make it worse than without adding it?

    - by user1676874
    I got a new laptop with 4GBs of ram, expandable to 8GBs. It has 1 4GB stick DDR3 PC3-12800 at 1600Mhz. I can't seem to find another one exactly the same locally, the closest I've found is 1 4GB stick DDR3 PC3-10600 at 1333Mhz. So my question is, I know they will both run at the slowest speed, so even if I have more available RAM it will become slower. Is the performance loss big enough to make the upgrade not worth the hassle?

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  • I bought a motherboard that supports DDR3 RAM

    - by CVertex
    I bought this ASUS Sabertooth X58 motherboard from http://msy.com.au/product.jsp?productId=7301 But I'm not sure what DDR3 RAM to buy. I haven't built a PC from scratch in about 3 years, and I'm wondering the following Do DDR3 ram chips need to be installed in three at a time? Or can I just install one or two now and install more later without any particular pattern? If I buy 2000MHz RAM from Corsair, will that work at 1866 MHz? (which is the highest frequency the motherboard supports) Is it just me or is 1866 RAM not around? Any help is greatly appreciated.

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  • What's the Minimum System Spec Recommended For Developer Laptop

    - by DaveDev
    I'll be regularly running Visual Studio 2010 Professional, SQLServer Express, Office and at least 1 virtual environment running a Linux Distro. I want the machine to be snappy and responsive even when doing a reasonable amount of Development work. I want to spend what it takes for this, but I don't want to go overboard spending more than I need to. I won't be playing many games or graphics processing so i won't need a monster of a machine. Any recommendations?

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  • In plesk 9.3.0, which php.ini is in use?

    - by Gaia
    I have 3 (actually 4, but the 4th one is for installatron) php.ini files in my Virtuozzo Container running RHEL 5.x /vz/root/1003/usr/local/psa/admin/conf/php.ini /vz/root/1003/etc/php.ini /vz/root/1003/etc/etc/php.ini which one do I use to change the MEMORY_LIMIT for a wordpress app running in the container 1003? Thanks!

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  • Practically expected transfer rates for sdhc class 6

    - by bobobobo
    I went and bought an expensive SanDisk Extreme III SDHC 8GB class 6 chip. However when I dump data from the card to the machine via USB 2.0 cable, its only getting 5.0 MB/second maximum according to Windows 7 disk explorer. It still can take up to 20 minutes to dump the card when its near full. This is so far below the rated 20MB/s transfer speed I can't believe it. Is this normal or might I have a defective chip?

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  • Rail's FileStore with Linux Disk Caching or RAMdisk?

    - by Yo Ludke
    I have a Ruby on Rails application that stores it's catched files on the filesystem (Rails file-system cache). I was thinking about changing to memcached Store, but a short test shows it isn't a big difference in speed. From linuxatemyram.com I learned a bit about file caching. On the current machine there would be around 40..45GB RAM left which isn't needed for the application and which can be used to linux-disk-cache this rails file cache store. The disk is a RAID10 system with almost 120MB disk perfomance. How can I tell Linux to use free RAM more deliberately and not to be shy about using it? Do think it's necessary to adjust a sysyctl/.. value here, or would I have performance advantages to put the File Store root diretory on a ramdisk? (Loosing the cache during a reboot wouldn't be a problem)

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  • SAPPHIRE NOW : SAP ouvre un site pour tester HANA, sa solution de In-Memory Computing au coeur de sa "stratégie d'innovation"

    SAPPHIRE NOW : SAP ouvre un site pour tester HANA Sa solution de In-Memory Computing au coeur de sa « stratégie d'innovation » Autre jour, autre ambiance au SAPPHIRE NOW de SAP qui se tient actuellement à Madrid. Si la présentation de Jim Hagemann Snabe, hier, était placée sous le signe de la sciences fiction, celle de Vishal Sikka, membre exécutive du Board de SAP, était aujourd'hui placé sous celui de la mythologie et de la Grèce antique. Le message, en revanche, confirmait celui introduit par le le co-PDG de la société : Cloud, Mobilité et In-Memory so...

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  • Only half of RAM is recognized by BIOS

    - by Rick Crawford
    I got a Gigabyte GA-P35-DS3 mainboard. Some time ago I noticed that Windows only showed 2GB instead of 4GB. I don't know exactly what caused it anyway. I tried putting in each of the 4 x 1GB RAM modules one by one, and tried every slot one by one, until every stick and slot worked. However, then I tried adding one more at a time, and it kept showing 1GB, until I put in all 4, where it only showed 2 GB instead of 4 (in BIOS and windows 7 64bit). I tried replacing the BIOS battery since I've read that low battery could cause it. It didn't help though. I also bought 4GB new RAM (yes, it's supported, I checked it), and it's still the same, it only shows 2GB (or 3GB, when I put in 4 of the new and 2 of the old). I also did the latest BIOS update, and used default BIOS settings, but nothing of that helped. When my PC boots it shows "RAM modules used 2 and 3", when 4 sticks are in - or "0 and 1", when only 2 are in.

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  • A brief note for customers running SOA Suite on AIX platforms

    - by christian
    When running Oracle SOA Suite with IBM JVMs on the AIX platform, we have seen performance slowdowns and/or memory leaks. On occasion, we have even encountered some OutOfMemoryError conditions and the concomittant Java coredump. If you are experiencing this issue, the resolution may be to configure -Dsun.reflect.inflationThreshold=0 in your JVM startup parameters. https://www.ibm.com/developerworks/java/library/j-nativememory-aix/ contains a detailed discussion of the IBM AIX JVM memory model, but I will summarize my interpretation and understanding of it in the context of SOA Suite, below. Java ClassLoaders on IBM JVMs are allocated a native memory area into which they are anticipated to map such things as jars loaded from the filesystem. This is an excellent memory optimization, as the file can be loaded into memory once and then shared amongst many JVMs on the same host, allowing for excellent horizontal scalability on AIX hosts. However, Java ClassLoaders are not used exclusively for loading files from disk. A performance optimization by the Oracle Java language developers enables reflectively accessed data to optimize from a JNI call into Java bytecodes which are then amenable to hotspot optimizations, amongst other things. This performance optimization is called inflation, and it is executed by generating a sun.reflect.DelegatingClassLoader instance dynamically to inject the Java bytecode into the virtual machine. It is generally considered an excellent optimization. However, it interacts very negatively with the native memory area allocated by the IBM JVM, effectively locking out memory that could otherwise be used by the Java process. SOA Suite and WebLogic are both very large users of reflection code. They reflectively use many code paths in their operation, generating lots of DelegatingClassLoaders in normal operation. The IBM JVM slowdown and subsequent OutOfMemoryError are as a direct result of the Java memory consumed by the DelegatingClassLoader instances generated by SOA Suite and WebLogic. Java garbage collection runs more frequently to try and keep memory available, until it can no longer do so and throws OutOfMemoryError. The setting sun.reflect.inflationThreshold=0 disables this optimization entirely, never allowing the JVM to generate the optimized reflection code. IBM JVMs are susceptible to this issue primarily because all Java ClassLoaders have this native memory allocation, which is shared with the regular Java heap. Oracle JVMs don't automatically give all ClassLoaders a native memory area, and my understanding is that jar files are never mapped completely from shared memory in the same way as IBM does it. This results in different behaviour characteristics on IBM vs Oracle JVMs.

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