General :: Can A Ramdrive Be Used To Speed Up Performance
Feb 1, 2011
I have recently upgraded to a M4A77TD motherboard and 8Gig of memory.I have a AMD Athlon(tm) II X4 645 Processor, and I cant say that I see much improvement over the one that died. I have noticed that the HDD light is constantly flashing so I wondered if I couldnt use some of the Ram to create a ramdrive to speed things up . So ..my question ... what should I put on my ramdrive? My own thoughts were the var and usr directories. I would load the ramdrive at startup (which would slow down my startup) And Rsync back again on shutdown.Has anyone done this? Ive had a look through the forum but cant see anything ..but my search terms may not be all that good.
suse linux 11.1 64 bit
var=0.3G usr=5M lib=0.2G opt=0.6G sys=0.6G
As far as I can see swop is never used
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Jul 31, 2010
I just wanted to know if having my laptop set to ondemand, will this affect performance in any way? I realize it increases the clock speed to performance when the CPU is under load, but does the time it take to go from ondemand to performance affect speed? Will there be any noticeable difference between the two setups? I have a dual core intel at 2.2GHz when in performance. When ondemand is set with no load it downclocks to 800Mhz.
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Jun 30, 2011
I'm new to openSUSE and my computer is quite slow although my computer isn't that bad. I opened up ksysguard and it appears that my CPU is the bottleneck. My CPU usage is usually 100%, then after a few seconds, it goes down to 20-60% and then it goes back up to 100% after another few seconds. It says I have 141 processes running (I don't know if that's normal or not).
My Specs are:
CPU: AMD Duron (tm) processor 1.8GHz
Graphics Card: NVIDIA GeForce 6200
Memory: 2GB RAM
I'm using KDE.
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Nov 24, 2010
I have A dell vostro v13. I am have installed LMMS which runs ok if I put minimal demands on it but if I start putting to many demands on it like running More then three Zynaddsubfx plugins or multiple sample players the cpu moniter goes into the red and it starts to sound bad and slow down a great deal. I know a small laptop is probably not the best choice to run a DAW on unless it has a good processor but this is the only computer I currently have and I really like LMMS. Is there any way I can get more performance out of my computer? I looked a little into overclocking but dell Bios Does not allow for this. Is there any tricks that I can do to get LMMS to perform better given the limitations of my system?
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Mar 6, 2011
I have an older PC running Ubuntu 10.04, and the system is slow, especially with Firefox running. I recently upgraded to 2 gig memory, but it didn't help. I have plenty of space on my hard-drive, using only 30 gig of 80 gig. My CPU is Intel Celeron 2.40GHz. I have broadband, and the speed seems good. What are the system requirements for Ubuntu 10.04? Any tips for speeding performance, esp on Firefox? I used to do a defrag when I had Windows; is there any need to do that on Ubuntu also?
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Nov 2, 2010
My desktop tower is pretty old and runs horribly slow nowadays. I only use it for a little internet browsing and to upload photographs etc. It runs on 1Gb RAM and has the celeron(R) 2.4GHz processor. What is the best way to boost overall performance speed/response times? would a better processor be viable?
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Jan 5, 2011
I have recently migrated my file server over to a HP Microserver. The server has two 1TB disks, in a software RAID-1 array, using MDADM. When I migrated simply moved the mirrored disks over, from the old server Ubuntu 9.10 (server) to the new one 10.04.1 (server).I Have recently noticed that write speed to the RAID array is *VERY* slow. In the order of 1-2MB/s order of magnitude (more info below). Now obviously this is not optimal performance to say the least. I have checked a few things, CPU utilisation is not abnormal (<5%) nor is memory / swap. When I took a disk out and rebuilt the array, with only one disk (tried both) performance was as to be expected (write speed >~70MB/s) The read speed seems to be unaffected however!
I'm tempted to think that there is something funny going on with the storage subsystem, as copying from the single disk to the array is slower than creating a file from /dev/zero to the array using DD..Either way I can't try the array in another computer right now, so I though I was ask to see if people have seen anything like this!At the moment I'm not sure if it is something strange to do with having simply chucked the mirrored array into the new server, perhaps a different version of MDADM? I'm wondering if it's worth backing up and starting from scratch! Anyhow this has really got me scratching my head, and its a bit of a pain! Any help here would be awesome, e-cookies at the ready! Cheers
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Mar 17, 2011
I just got myself a OCZ vertex 2 SSD and have been moving cache directories to a ram drive to try to help extend the life of my SSD and improve system performance. I have created a ram drive /tmp directory in fstab like soCode: tmpfs /tmp tmpfsnodev,nosuid,noexec,mode=1777 0 0 And have since moved my Firefox temporary files to the /tmp directory and it have gotten me thinking, what else can I move here. I am going to upgrade my computer to have 8gb�s of ram which is way more than I�ll ever need.I would like to move the transmission cache dir there but I don�t know how to. Anyone have any tips on that? I was thinking of maybe a script that will run when I login to create a symbolic link?
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Oct 17, 2010
I've just installed Slackware 13.1 in two different laptops for first time. I have some strange internet browsing behaviour in one of the laptops. I've installed 2 internet browsers(firefox,opera) using the directions from Slackbuilds.org and there is also konqueror pre-installed. Moreover I installed Wicd network manager.
I can browse some pages e.g. ..... with firefox very slowly but NEVER facebook. I can browse almost any page, even facebook, with OPERA but very very slowly. The same goes with konqueror... Wicd shows that i am always connected with my WPA wireless network
Laptop details:
Quote:
Toshiba sattellite a100-209
//-----------------------------------------------
Processor Intel Celeron M 370 / 1.5 GHz
Databus-Speed 400 MHz
//-----------------------------------------------
Installed RAM 512 MB
Technology DDR2 SDRAM - 533 MHz
[code]....
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Jul 23, 2011
Ubuntu 64bit. The sound system works and plays noises correctly when I test the speakers in sound preferances. The internet BBCi player(Radio) plays sound correctly. Banshee & Rhythmbox try to play music files at double, or more, speed with no sound output. Spotify Linux version also tries to playback at double speed with no sound output. Media Player attempts to play music files at high speed. Media player plays the Video and audio tracks at high speed. VLC Will play the video at normal speed but with no audio.
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Dec 20, 2010
i both have the same problem, i'm trying to burn my images at 4 or 8 speed, but ubuntu 10.04 says that the hardware does not support that kind of speed and switch up to 16 speed and more. i know it can burn at low speeds, at least in windows, it is a bit strange that fast burning is okee, and slow not, what can i do to prevent this? i don't wanna burn to much errors on my discs
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Jun 25, 2010
I'm running 32 bit Ubuntu 10.04 with 2GB RAM. Is my processor (AMD Athlon 64 X2) running sub-optimally?Given that a larger addressing space will make no difference to me (right now) would there be a performance gain or any other advantage to switching to 64 bit Ubuntu.
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Jul 9, 2010
I'm looking for a tool for Debian Linux that can measure the synchronisation performance between two desktops.
I'm using RADClock instead of the NTP client to synchronise my desktops.
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Apr 24, 2011
Modern systems seem to be EFI based, and while there's a specific version of lilo that works with it, i can't seem to find any mention of a efi varient of grub (edit - on modern debian derivative systems there's grub-efi. Most references to it seem to be about various bugs in/for it tho) . In general, how well is EFI supported on linux?In addition, apparently windows 7 uses EFI to enable faster boot - 12 seconds or so with some systems. While a properly tweaked linux system could probably come close, are there any enhancements to the linux booting procedure that take advantage of EFI?
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Aug 26, 2011
I have a machine that I want to install Nessus on it.
Nessus supports many Operating Systems:
Microsoft Windows
Mac OS X
Linux
FreeBSD
The full list is here: [URL]... What would the best OS to install Nessus on for performance be?
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May 8, 2011
Does anyone here has any experience with the proprietary compilers? OpenWatcom, Intel and Pathscale? Does the performance gain is noticeable regarding the gcc...?In number crunching applications, i may say that ifort/ icc/ mkl yeld faster binaries than gcc.has anyone here already tinkered with OpenWatcom/PathScale...?
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Jun 8, 2011
what is High Performance computing and its uses.
what is active active and passive passive cluster ?
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Feb 15, 2011
I have written a script as follows which is taking lot of time in executing/searching only 3500 records taken as input from one file in log file of 12 GB Approximately. Working of script is read the csv file as an input having 2 arguments which are transaction_id,mobile_number and search the log file having these two strings with one more static string that is "CustomCDRInterceptor",then format the searched data in prescribed format.
Code of script written is as follows:
Code:
Sample data of input file will be like :
Code:
Sample Data in log file is as follows:
Code:
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Feb 20, 2011
My Firefox configuration is tricky:
Firefox runs at separate restricted user account which cannot connect to main X server.
Firefox uses Xvfb (virtual "headless" X server) as X server.
x11vnc is running on that Xvfb.
On the main X server there is vncviewer running that connect to this x11vnc
On powerful laptop (Acer Extensa 5220) it seems to work more or less well, but on "Acer Aspire One" netbook it is slowish (on a background that firefox is loaded with lots of extensions).How to optimise this scheme? Requirements:
Browser cannot connect to main X server.
Browser should be in chroot jail (no "suid" scripts, readonly for many things)
Browser should have a lot of features (like in AutoPager, NoScript, WoT, AdBlockPlus)
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Mar 18, 2011
I'm using mplayer and libcaca on Gentoo. My framebuffer (uvesafb) is running at 1920x1200 (I don't know how many characters that is) and mplayer has problems filling up the screen, so video and audio lose synchronization.
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Jan 19, 2010
Is there a 'top' like command for monitoring the GPU and memory usage of a video card? I am most interested in Linux commands, but and OS would be interesting. I strongly suspect that for a group of my systems the video cards are being under-utilized (but I have no idea by how much) and would like to re-allocate funds to other bottle-necks. We are using higher end cards, so the price difference between cards is significant.
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Apr 9, 2010
I've recently been experimenting with glxgears, but found people saying this is not an ideal benchmark tool as there are many variants; for example resizing the window affects the FPS tremendously.
I'm interested in testing the difference between using the proprietary ATI driver and the open source driver and also the performance under various distributions.
What's the best software to benchmark graphics cards?
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Oct 19, 2010
I am running openSuse 11.2 (32-bit), my CPU only supports 32-bits. I have a hardware RAID device. My system has 4GB of RAM. When I configure my system to only use 3GB, 2GB, or even 1GB, using mem=1024M in grub, my RAID performance is much better then when letting my system use the default 4GB available.Can anyone explain to me why this is? Is there anything I can do, i.e. kernel configuration, that will help performance when running with all 4GB enabled?
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Mar 3, 2011
if I make more partitions rather than creating single one, will I get more data access performance? E.g Instead of keeping 1,5TB partition, create 5x300MB and keep different data in different partitions? Logically hard drive will spend less time on finding data in smaller partition then in bigger one, right? Is there any statistics for performance vs size?
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Sep 7, 2010
I have a 64-bit computer but 64-bit distros have been giving me huge problems when using 32 bit apps or trying to install 32-bit libraries, so I think I'm going to just switch to 32 bit. Will I notice much of a hit in performance? This computer is mostly used for web and games, nothing particularly cpu-intensive (no graphics rendering, etc)
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Jul 14, 2010
I ahve installed Nagios 3.2.1 and to generate performance graphs i am trying to use opmon [URL] there are three utilities required to generate graphs: I have installed all prerequisites successfully.
opcfg
opcp
opdb
Here i have installed opcfg successfully and working good, For opcp requirement is "opdb" but no proper documentation available. But while compiling opdb from command
gcc -D_GNU_SOURCE -Wall -shared -o opdb.o opdb.c -L/usr/lib/mysql -lmysqlclient -DNSCORE
Its giving error: Please see attached file For thsi also no proper documentation available.
is there any other easy way to generate performance graphs from Nagios.
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Sep 25, 2010
I need someone to please point me in the right direction with this. I'm using a supposedly nice graphics card under Ubuntu 9.10, an Asus GeForce GTS 250 1GB Dark Knight, and I think I'm getting a poor performance out of it. I realized this when "backing up" some movies I have on DVD and took more than 30 min with k9copy for each DVD.
The CPU is a AMD Phenom II 955 X4 Quad Core 3.2Ghz Black Ed. 125W AM3. Which I think is powerful enough for not to be a bottleneck. Maybe there is nothing wrong with the graphics card and the bottleneck is somewhere else. I provably should benchmark my system to find out if I'm not taking advantage of my hardware. I've seen phoronix has a test suite. Any other recommendations?
[Code]...
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Jun 4, 2011
I am making comparison between tora , dsr , dsdv and aodv. There is some error in tora.tcl protocol. Rest is working fine..why the tora.tcl is popping the error?
Error is given below:-
Code:
num_nodes is set 6
INITIALIZE THE LIST xListHead
(_o22 cmd line 1)
invoked from within
"_o22 cmd port-dmux _o37"
invoked from within
"catch "$self cmd $args" ret"
invoked from within
"if [catch "$self cmd $args" ret] {
set cls [$self info class]
global errorInfo
set savedInfo $errorInfo
error "error when calling class $cls: $args" $..." .....
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Jul 11, 2010
I attended many interviews for Linux Admin post. Most of them asked me a common question 'How do you handle System Performance Issues' on a Linux Server. Now how do I answer this?
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Oct 17, 2010
I've just bought a 6-core Phenom with 16G of RAM. I use it primarily for compiling and video encoding (and occassional web/db). I'm finding all activities get disk-bound and I just can't keep all 6 cores fed. I'm buying an SSD raid to sit between the HDD and tmpfs. I want to setup a "layered" filesystem where reads are cached on tmpfs but writes safely go through to the SSD. I want files (or blocks) that haven't been read lately on the SSD to then be written back to a HDD using a compressed FS or block layer.
So basically reads:
- Check tmpfs
- Check SSD
- Check HD
And writes: - Straight to SSD (for safety), then tmpfs (for speed) And periodically, or when space gets low: - Move least frequently accessed files down one layer. I've seen a few projects of interest. CacheFS, cachefsd, bcache seem pretty close but I'm having trouble determining which are practical. bcache seems a little risky (early adoption), cachefs seems tied to specific network filesystems. There are "union" projects unionfs and aufs that let you mount filesystems over each other (USB device over a DVD usually) but both are distributed as a patch and I get the impression this sort of "transparent" mounting was going to become a kernel feature rather than a FS.
I know the kernel has a built-in disk cache but it doesn't seem to work well with compiling. I see a 20x speed improvement when I move my source files to tmpfs. I think it's because the standard buffers are dedicated to a specific process and compiling creates and destroys thousands of processes during a build (just guessing there). It looks like I really want those files precached.....
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