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• Problem with screen redrawing at DOS app in VmWare Player

  - by MicTech

  I have very old DOS Application (CadSoft Eagle - PCB Designer) and I want to work with it on my workstation with Windows 7. Then I install Windows 98 and that software into VmWare Player. But that software has serious problem with redrawing screen. It's very slow in comparison with my Intel Celeron 333MHz with Windows 98. I have same problem if I try to use DOSBox. I also trying run this application directly on Windows XP with compatibility mod set to "Windows 98", but I get "(0Dh): General Protection Fault". Can someone give me good advice how I solve that?

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• How to search for a folder from the Windows 8 Start screen

  - by Edward Brey

  In Windows 7, if you press the Windows key and type the name of a folder, and the folder shows up among the Start menu search results. In Windows 8, if you do the same thing, no folders are listed. The Files filter shows files with matching names, but no folders. I realize that you can still search for folders from the Windows Explorer search box, but navigating that way is a bit slow and clumsy. Is there a quicker way, in particular a way to search directly from the Windows 8 Start screen?

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• How to secure Apache for shared hosting environment? (chrooting, avoid symlinking...)

  - by Alessio Periloso

  I'm having problems dealing with Apache configuration: the problem is that I want to limit each user to his own docroot (so, a chroot() would be what I'm looking for), but: Mod_chroot works only globally and not for each virtualhost: i have the users in a path like the following one /home/vhosts/xxxxx/domains/domain.tld/public_html (xxxxx is the user), and can't solve the problem chrooting /home/vhosts, because the users would still be allowed to see each other. Using apache-mod-itk would slow down the websites too much, and I'm not sure if it would solve anything Without using any of the previous two, I think the only thing left is avoiding symlinking, not allowing the users to link to something that doesn't belong to them. So, I think I'm going to follow the third point but... how to efficiently avoid symlinking while still keeping mod_rewrite working?! The php has already been chrooted with php-fpm, so my only concern is about Apache itself.

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• 2010 MBP HD speed sanity check?

  - by hvgotcodes

  I have a 2010 MBP with the 7200 rpm hard drive. I was copying a 2.1GB file, and noticed read/write speeds of around 20MB/s. Is that reasonable? Seems slow to me.... What is the proper way to benchmark a HD on OS X? Googling I see xbench, but that hasn't been updated in years. I also see some guides for using the command line. The goal would be to benchmark my drive and then compare the results to some official scores that the drive should be getting.

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• What's the typical latency for key strokes using an ssh connection on a local wifi network?

  - by dan

  I develop software on a Macbook Air 1.6 Ghz but find running Rails test suites and generators on this computer very slow. I'm thinking about buying a Linux tower to put on my local wireless network to do my Rails development on. I would want to use my Macbook Air and ssh into the Linux box and do my development with Gnu Screen, vim, etc. Can I expect the keystroke and echo latency for a ssh session between two machines on a local wireless network to be negligible? Does anyone develop using this kind of local setup?

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• Can a GPO Startup Script starts a background process and exit immediately?

  - by pepoluan

  I have Googled, and not yet found an answer. Scenario: One of my GPOs have a Startup Script that takes a long time to finish. For some reasons, we have to run the scripts synchronously. Naturally, this causes slow startup time (sometimes as long as 15 minutes!) before the Logon screen appears. After profiling and analyzing the perpetrator script, I conclusively determined that the step where it's taking a long time to finish will not affect the result of the succesive GPOs. In other words, that particular step (and all steps afterwards) can run in the background. My Question: Is it possible for the Startup Script to just 'trigger' another script/program that will run to completion even when the Startup Script exits? That is, the "child processes" of the Startup Script continues to live even when the Startup Script's process ends? Additional Info: The Domain Controllers are 2008 and 2008 R2's. The workstations are Windows XP.

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• How to install ported Linux software on a Mac? (MacPorts, Fink, anything better?)

  - by Ben Alpert

  On my Mac OS X machine, how would you recommend I install various software that's been ported from Linux? I don't install such software very frequently, but I've been using MacPorts and it always seems quite slow, presumably because it has to compile the packages on-the-fly. I'd much prefer a package management system that has binary packages, saving me the need to compile things every time I want to download something new. I think Fink has binaries for some of the packages, but I usually see MacPorts recommended as the system to use. Which do you think works better and why? (Or is there another system that I haven't heard of?)

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• Server downtime - are these APC warnings the cause?

  - by DisgruntledGoat

  Yesterday I had a problem with my dedicated server (Ubuntu 10.04, LAMP). It wasn't down per se, but running incredibly slowly as if we had a massive overload of visitors (though I don't think we did). It's running smoothly again now. I've been checking through log files etc to see if I can find any issues, the only strange thing is a bunch of these errors, occurring at about the same time as the downtime: [apc-warning] Unable to allocate memory for pool. in [file] on line 49. And a bit later on: [apc-warning] GC cache entry '[file1]' (dev=2056 ino=8988092) was on gc-list for 3601 seconds in [file2] on line 746. Could these errors indicate the cause of the server slowdown, or are they simply a result of the server being slow in the first place? What would be the solution?

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• What would cause a query being ran from SSMS on local box to run slower then from remote box

  - by Racter

  When I run a simply query such as "Select Column1, Column2 from Table A" from within SSMS running on my production SQL Server the results seems to take extremely long (45Min). If I run the same query from my dev system’s SSMS connecting to the production SQL Server the results return within a few seconds (<60sec). One thing I have notices is if the system was just rebooted performance is good for a bit. It is hard to determine a time as I have had it start running slow very quickly after reboot but at most it performed good for 20min and then start acting up. Also, just restarting the SQL service does not resolve the issue or provide a temporary performance boost. Specs for Server are: Windows Server 2003, Enterprise Edition, SP2 4 X Intel Xeon 3.6GHz - 6GB System Memory Active/Active Cluster SQL Server 2005 SP2 (9.0.3239)

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• MacBook Pro USB port provides more current in Mac OS X than in Windows

  - by AngryHacker

  I have a MacBook Pro with both Mac OS X Lion and Windows (under BootCamp) installed. While in Windows, I tried to charge my iPad 3 via the USB port. The iPad says "Not charging", but really, it does, just super slow (4-5% per hour). The reason for this is that the iPad requires 2.1 A of current, but a standard USB port provides 0.5 A. However, if I switch to Mac OS X, the iPad states that it is charging and it does at a rate of about 10% per hour. The only takeaway from this is that either OS X puts out more current on the USB port or that it recognizes the iPad and acts accordingly. Can someone provide more information on what is actually happening?

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• Justification of Amazon EC2 Performance

  - by Adroidist

  I have a .jar file that represents a server which receives over TCP an image in bytes (of size at most 500 kb) and writes it file. It then sobels this image and sends it over TCP socket to the client side. I ran it on my laptop and it was very fast. But when I put it on Amazon EC2 server m1.large instance, i found out it is very slow - around 10 times slower. It might be the inefficiency in the code algorithm but in fact my code is nothing but receive image (like any byte file) run the sobel algorithm and send. I have the following questions: 1- Is it normal performance of Amazon EC2 server- I have read the following links link1 and link2 2- Even if the code is not that efficient, the server is finally handling a very low load (just one client), does the "inefficient" code justify such performance? 3- My laptop is dual core only...Why would the amazon ec2 server have worse performance that my laptop? How is this explained? Excuse me for my ignorance.

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• Linux: set up media server to stream video via the Internet?

  - by Hassan

  How do I set up a media server in Linux which streams video over the internet? Is it easy to do this? I want a server that will actually encode video in real time to allow it to stream over sometimes slow or unreliable networks. Basically, I want a server that works on the internet. I have a directory with a bunch of video files, and want to make this accessible to myself remotely. For other situations, I found great and useful software (such as the PS3 media server). I'd like to find something equally as useful for streaming video over the internet.

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• How can we tell what driven the Private bytes spiking.

  - by ronin

  I have websites running on .Net Framework 2.0 environment. For recent every day my website becomes slow at certain time and I need to recycle my app pool. I checked the log file found that the private bytes will spike during that time slot. Through some research I already know that the managed code and unmanaged code consists of Privates and we can identify which one cause the spike based on "Bytes in all heaps" counter. But I can't find a way to dig deeper. Is there any way that I can find out what driven my private bytes spike? How can we see what the private bytes are being used for? Thanks, Ronin

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• Improving Windows Authentication performance on IIS

  - by flalar

  We're struggling with performance issues with a ASP.NET MVC site that is using Windows Authentication. Response time is very slow on the first request to the site when the user is being authenticated. Further, every time the Authorization header is sent from the browser the response time increases with many seconds. The same issue occurs for both executed files and static content like CSS and JS. Access to the application is restricted to users within a certain role and we are now planning to allow access to static files for all authenticated users to see if that helps. The authentication method in use is NTLM. How should we go forward in pinpointing why authentication decreases performance drastically?

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• New Windows 7 Install Crashing

  - by bobber205

  One big reboot crash and one smaller crash already, 15 minutes in. Did a basic install of Windows 7, installed Chrome and Firefox. I had just finished loading up my gmail account in Chrome/Firefox to show the speed difference and we'd thought it would be hilarious to see how slow IE8 was. :P Just about as IE8 was done opening, the computer's screen goes black. After a restart and a couple minutes, Explorer crashes as well. What is going on? This install is only 15-20 minutes old. :P

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• Is it possible to continue torrent downloads from other client

  - by Nrew

  I have downloaded a torrent file but I downloaded it using bitlord. And because bit lord doesnt have the ability like initial seeding. I decided to use utorrent. Ive already tried to continue it. What I did was to: Opened the original torrent file in utorrent. Target where the incomplete bitlord incomplete file was. But it seems that utorrent isn't detecting the file and it makes another copy of it and start to download from the beginning. Im at about 80 percent and there are only 18 seeds but there's 17 leech. And my connection is slow so I really have to initial seed. Other details: I've reformatted the original machine where I downloaded it. Also didn't copy the original application.

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• Mobile Intel 965 vs 4 Series chipset speed differences

  - by graham.reeds

  A client of ours is having a problem panning on a mapping application that we write on their panasonic toughbooks (CF-19's). One of their toughbooks the panning is fairly smooth while on the other it is really slow. Doesn't help that they have all the settings turned up, but I would of thought any reasonably new graphics card (even shared memory) would have more than adequate graphic speed. I am pretty sure that the graphic adapter is to blame, but I can't find anything out about either chipset (level of acceleration, non-problems, etc). All I get is the intel data sheets. The faster panning one is on the Mobile Intel 4 Series Express Chipset while the slower is on the Mobile Intel 965 Express Chipset. Is this expected? Does it sound like a driver problem? They both have the same amount of ram and same cpu.

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• What media formats do I have to use to prevent Zune from having to convert media for Windows Phone?

  - by Billy ONeal

  Zune is able to accept pretty much every media format under the sun, or at least can once someone's installed something like the KLite Codec Pack. However, it does do conversion on your behalf to a more supported format when you try to sync the contents over the Windows Phone. I'd like to not have to wait for the really slow process of doing the conversion... how do I know which media format to download? (For example, there are 5 media formats available for each of the MIX sessions....)

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• Rate of UDP packet loss over WLAN

  - by Martin

  While testing something with TFTP I noticed lots of timeouts (and slow speed as result) when I used my WLAN - and no problems when using a network cable. A quick test program sending/receiving UDP revealed that there are about 3-5% packets lost. While it's obvious that WLAN has to be less reliable than LAN, I have no knowledge what loss rates are considered 'normal' - and when there is a need to further investigate the network infrastructure. Are there 'typical' packet loss rates on WLAN (and other network technologies e.g. PowerLAN, WAN, ...? Thanks

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• How is it possible for SSD's drives to have such a good latency?

  - by tigrou

  First time i read some information about SSD's, i was surprised to learn they internally use NAND flash chips. This kind of memory is generally slow (low bandwidth) and have high latency while SSD's are just the opposite. But here is how it works : SSD drives increase their bandwidth by using several NAND flash chips in parallel. In other words, they do some data striping (aka RAID0) across several chips (done by the controller). What i don't understand is how SSD's drives have such a low latency, whereas they are using NAND chips? (or at least lot better than what a typical single NAND chip would do) EDIT: I think under-estimate NAND chip capabilities. USB drives, while powered by NAND's are mostly limited by USB protocol (which have a pretty high latency) and the USB controller. That explain their poor performance in some cases.

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• Self hosted Wordpress freezes for 20 seconds before sending the page

  - by TheoJones

  I have a website with Wordpress and PHPBB integrated - and it's been fine for months.. then all of a sudden, it's unbelievably slow to load. There are no errors in the apache logs, but looking at the page in firebug shows a 20 second pause, before the page is delivered. more confusing, on the same server, same apache installation, PHPBB loads in 30ms, no delay. I tried the hogdetector wordpress plugin, which indicates that the delay is before the header is sent - which seems to agree with firebug. Any ideas how to troubleshoot this one further?

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• How to allow simple file sharing on Windows Server 2008R2 through VPN

  - by Martin Wiboe

  We are a small, distributed company with a Windows Server 2008R2 installation. I would like to set up a way for our employees to connect securely to this server via VPN and then be able to map a network drive. I have gotten this to work somewhat by installing the Network Policy and Access Services Role on the server and using the default settings. I have also created a network share on the server. The problem is that our connectivity is sporadic (sometimes the service stops listening on the port or simply refuses to authorize correct credentials) and slow. I can always connect through VPN, but mapping is problematic. I would be grateful for the answer on how to accomplish this as well as some guidance on whether I am on the right track. Thanks in advance!

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• PHP processes run one at a time, always taking 100% of one core

  - by Derek Kurth

  We have seven websites written in PHP running on a Windows 2008 server with IIS 7.5. They are all very slow right now. When I look in Task Manager, I see around 10 php-cgi.exe processes, and they are all taking 0% of the CPU, except one, which is taking 25%. It's a quad-core server, so it's taking 100% of one core. If I watch for a few seconds, the process taking 25% will go to 0%, and a different php-cgi.exe process will jump to 25%. So all the php-cgi.exe processes are just lined up, waiting on a single core, and each process uses 100% of the processor when it can. Each of the 7 sites is in its own application pool in IIS, and we're using FastCGI. The PHP version is 5.3. Any ideas? Thanks!

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• How computers display raw, low-level text and graphics

  - by panic

  My ever-growing interest in computers is making me ask deeper questions, that we don't seem to have to ask anymore. Our computers, at boot, as far as I understand it, are in text mode, in which a character can be displayed using the software interrupt 0x10 when AH=0x0e. We've all seen the famous booting font that always looks the same, regardless of what computer is booting. So, how on earth do computers output graphics at the lowest level, say, below the OS? And also, surely graphics aren't outputted a pixel at a time using software interrupts, as that sounds very slow? Is there a standard that defines basic outputting of vertices, polygons, fonts, etc. (below OpenGL for example, which OpenGL might use)? What makes me ask is why OS' can often be fine without official drivers installed; how do they do that? Apologies if my assumptions are incorrect. I would be very grateful for elaboration on these topics!

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• Why does Oracle SQL Developer take so long to open?

  - by oscilatingcretin

  I think anyone who's used Oracle SQL Developer will agree that it's painfully slow on the load. My research has lead me to a solution that seems to have helped a little, and that's telling OSQLD not to check for updates on startup. However, it still takes several minutes to open. What could OSQLD possibly be doing during load time? Is there any way get it to open right away? Edit: Adding potentially relevant system specs: CPU: Intel i5-2520M 2.5 ghz Windows 7 32-bit RAM: 4 gb

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