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  • HP Probook 4530s great specs, but lagging. Hard Drive?

    - by Mark
    I have this laptop, which has a i3 processor, 4gb memory, 7200rpm hard drive. So there is nothing wrong with the specs. Even when I have no applications open, simply closing and opening windows, lags. Or opening the start menu, or dragging icons across the desktop. sometimes even the cursor lags. So I checked out the resource monitor, and the resources using disk activity are svchost Avast ------- my antivirus, but not much System (PID 4) ------ This is using a huge chunk The total disk activity fluctuates between %50 - %100

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  • Centos running Apache Tomcat keep getting "java.net.SocketException: Too many open files"

    - by Gerard Moroney
    We're running Apache Tomcat 7.0.41 on CentOS 6 with java version "1.7.0_21". We were getting a lot of too many open files errors so I did some research. The consensus was that it was to to with the number of open files. So I did the following: Increased max files in /etc/security/limits.conf soft nofile 100000 hard nofile 100000 Rebooted the server Checked the limits were valid for the user which was to run the process [app_admin@xxx ~]$ ulimit -Hn 100000 [app_admin@xxx ~]$ ulimit -Sn 100000 Monitored open files on the server using the lsof command What I observed was when the total open files reached circa 13000 and tomcat had around 4500 open files the error reappeared. I am confused. I thought it would have resolved the problem but clearly I don't fully understand the root cause and also how to set the parameter correctly. To (maybe) help I have not modified the server.xml file for Tomcat (although I'm tempted). I don't want to start fiddling with that and make things worse. I'm more than happy to share any more information if someone can give me some hints on where to start looking.

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  • How to import Evolution application data from home folder backup

    - by Wolter Hellmund
    I had many folders and filters and mail in general in Evolution on my previous Ubuntu install, which I thought would be available for me for I had backed up my home directory. I have copied now Evolution related folders to my new home directory, and Evolution is not showing either the folders I had or any of the filters. To be more precise, I have copied the mail folder to ~/.config/evolution/ but that hasn't changed anything, as I said.

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  • why dstat failed with --tcp option?

    - by hugemeow
    why --tcp option failed? should i install some package? if yes, which package i should install? this question is not the same as http://stackoverflow.com/questions/10475991/tcp-sockets-double-messages dstat --tcp Module tcp has problems. (Cannot open file /proc/net/tcp6.) None of the stats you selected are available. what is the problem with module tcp, how to find the problem? what i should do in order to fix this issue?

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  • Web Service gets unavailable after several concurrent calls

    - by Roman
    We are testing GoDaddy Virtual Data Center and came to a very strange issue when our web site gets unavailable. GoDaddy Support keeps saying the issue is in our web server settings, but looking at the result of our tests I doubt it. TEST ENVIRONMENT Virtual DataCenter with Windows hosted at GoDaddy.com. All servers have Windows Server 2008 R2 Datacenter, IIS 7. Server One with IP address 10.1.0.4 Server Two with IP address 10.1.0.3 Both servers are in private network not visible from outside. Port Forward with IP address 50.62.13.174. Port Forward is assigned to Server One TEST DESCRIPTION JMeter is used as a Client App to simulate 30 concurrent users sending 100 SOAP requests each. Interval between requests is 1 second. Http link used for testing: http://50.62.13.174/v2/webservices.asmx TEST ONE Test is run from a computer in our office. After JMeter starts running test, almost immediately, the link above becomes unavailable in a browser. After test completion, the link is not available in a browser for about 5 more minutes. Remote Desktop is working well, so we can connect to Server One remotely. After about 5 minutes since test completion, the link becomes available in a browser again. TEST TWO Test is run from Server Two (that is part of our virtual data center). Test works very well, no visible delays in processing. The link is available in a browser all the time. TEST THREE Test is run from Server One using localhost. The result is the same as in TEST TWO - no issues. TEST FOUR We repeated TEST ONE from other computers that we have located in different countries, all with the same result as TEST ONE. CONCLUSION As the test works well from Server Two, but does not work from outside our virtual data center, we feel there are issues with the network or its capacity. The whole behaviour looks like out requests from outside get stuck somewhere before reaching our virtual data center. Has anybody had similar issues in the past? Are there chances that something is wrong with our server settings?

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  • Bad idea to keep htop running?

    - by Michael T. Smith
    I'm now monitoring multiple servers (3) and in the coming weeks that'll increase (towards 5 or 6). I've been keeping three terminal windows open running htop via SSH and I'm now wondering if there are any downsides to having a connection constantly open to production servers?

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  • Best Way To Develop Robust Cross-Platform Application?

    - by Clay
    Windows C programmer here (going back to 1992 and Windows95 back when it was called Windows93). Can function in C++, but mostly still a C programmer. Looking to build a cross-platform casual game. Very numbers heavy with only a few artistic embellishments and animations, so perhaps a development environment for business apps might be the best option. Or an easy-to-use 2D game dev platform. Target platforms: Windows, Mac, MS Tablet, iPhone, iPad, Android. I currently develop on Windows with Visual Studio 2012, but we could spend up to $50K on hardware/software/middleware if necessary. Not very competent getting open-source software working. Would rather pay the money and jump right into app development. Recommendations?

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  • Transformation of Client/Server application to Windows Azure

    - by Visual WebGui
    Overview The economics of IT is changing rapidly, and organizations are searching to widen and secure availability of their systems and at the same time lower costs. The cloud concept was introduced to allow an IT consumption model where there is always as much computing power as needed when needed ('on-demand') and without having to invest in connectivity, servers, database access, storage space, CPU power and other infrastructure needs, just as we consume electricity. Running your systems on Microsoft...(read more)

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  • ft_stopword_file not picked up

    - by Alex Holsgrove
    I have a VPS server with a company called Webfusion. I want to remove some or all of the FULLTEXT stopwords because some specific words needs to be searchable with my DB content. I opened /etc/mysql/my.cnf and added the line ft_stopword_file="". I restarted the mysql service, ran a repair table and then tried my MATCH query with no success. I ran SHOW VARIABLES LIKE 'ft_%' and it simply shows (built-in) next to the stopword file. I am running WAMP on my workstation, and whilst I realise this isn't configured the same as a commercial VPS, the above method worked just fine. Couple someone please offer some guidance?

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  • Computer experiencing slowdowns and lockups despite low cpu useage

    - by user157145
    my setup i5-2300 nvidia gtx 550 ti 6 gigs ram 600 w ocz modular psu recently reformatted and already experiencing drastic slowdown as soon as windows comes up, including repeated lockups with multiple various programs reporting that they are not responsive, then recovering after 10-30 seconds. ive checked memory and hard drive both of which come out fine. despite my plethura of worthless antiviral software im forced to assume that my illicit downloading practices have lead me into some comp trouble that i cant seem to determine. i have used ccleaner, search and destroy and malware bytes, all of which have found nothing to indicate what is causing this massive slowdown. in addition according to my resource manager my computer is operating at a load of only 30-50 percent CPU useage and 60 ram useage but taking 5-10 seconds to load files and open folders, and repeated lockups of multiple programs, especially firefox which seems to go unresponsive every 2-3 minutes. any help would be appreciated, i used a program called OTL by old timer, but cant make any sense of the results i was given. any help or suggestions would be appreciated, thank you for taking the time to read this i have avast but it didnt even find anything when i had it do a full system scan, so im thinking its clueless(also nortons, avg, and ad-aware). i also have mse but it has yet to complete a full scan it takes so long (i left it on last night but when i woke up my computer had a problem and had to restart). my hard drive has 300 gigs out of 1tb open and i already used hd tune pro, which said my harddrive was fine and its not a ssd. also im a noob at comps and only have the hd that is currently inside the computer in addition im not sure if studdering is the issue im suffering. my problem is that during my typing of these responses firefox has gone "not responsive" at least 5 times, each for times of about 5-10 seconds. when i try to control alt delete to bring up windows task manager it took 20 seconds. essentially its that my computer goes super slow at bringing up anything, or taking any action whatsoever that opens a program or file and has repeated incidents where i cant even click on whatever im trying to do because it locks up. the confusing thing about these incidents is that its right after restarting where there are minimal programs running and the computer and memory load is light.

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  • Enabling DMA in pc with windows 7

    - by Mugen
    I was checking my pc settings using AIDA64 (supposed to be the successor for Everest - it basically shows you detailed hardware you currently have). For my ATA hard disk it shows the setting for DMA as "supported, disabled". But when I checked the windows setting I see that it is actually enabled. How can I find out which is correct? And if its disabled what do I do to enable it? Thanks for your help. Here are some screenshots for this:

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  • Select,Insert,Update and Delete data with LINQ to SQL in an ASP.Net application

    - by nikolaosk
    As you might have guessed I am continuing my LINQ to SQL posts. I am teaching a course right now on ADO.Net 3.5 (LINQ & EF) and I know a lot of people who have learned through my blog and my style of writing. I am going to use a step by step example to demonstrate how to select,update,insert,delete data through LINQ to SQL into the database. If you want to have a look on how to return data from a database with LINQ to SQL and stored procedures click here . If you want to have a look on how to...(read more)

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  • New Oracle Database Performance and Tuning Specialization version available to all partners!

    - by Catalin Teodor
    Any partner working with the Oracle database should take advantage of the new Oracle Database Performance and Tuning specialization version. Have partners review the criteria and see what’s new in this specialization solution update. Partners should plan to take the new version as the Oracle Database 11g Performance Tuning specialization becomes non-qualifying as of August 1, 2015.

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  • Inspecting the model in a Rails application

    - by Matt Sherman
    I am learning some Ruby on Rails, and am a newbie. Most of my background is in ASP.net MVC on the back end. As I play with a basic scaffold project, I wonder about this case: you jump into an established Rails project and want to get to know the model. Based on what I have seen so far (again, simple scaffold), the properties for a given class are not immediately revealed. I don't see property accessors on the model classes. I do understand that this is because of the dynamic nature of Ruby and such things are not necessary or even perhaps desirable. Convention over code, I get that. (Am familiar with dynamic concepts, mostly via JS.) But if I am somewhere off in a view, and want to quickly know whether the (eg) Person object has a MiddleName property, how would I find that out? I don't have to go into the migrations, do I?

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  • Disable Offline Files (mobsync.exe) on Windows 7 Home

    - by Synetech
    This morning I was watching the CPU graph of a Windows 7 Home laptop and noticed that every few seconds, the CPU would spike several percent. I watched the processes and determined that it was mobsync.exe (Offline Files) that was the culprit. I tried the usual steps that Googling turns up, and clicking the Manage Offline Files link to bring up the Offline Files dialog to click Disable Synch does not work because the dialog will not display. This makes sense since everything I have read indicates that Offline Files is not even included/supported in the Home version, so I am at a loss as to why it is running at all, let alone why it is sucking up CPU cycles. (My best guess is that it was started when they pressed Win+X to access the Mobility Center.) Of course I can just kill mobsync, but it could always just come back. How/why would mobsync be running on a Home version and how can it be disabled (of course the Group Policy editor is not available on a Home version).

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  • How come my Intel 520 180GB SSD performs extremely poorly?

    - by Willem
    I recently installed a new Intel 520 series 180GB SSD in my brand new MacBook Pro. The system is as follows: Model: MacBook Pro 15-inch, Late 2011 (MacBookPro8,2) Processor: 2.4 GHz Intel Core i7 Memory: 16 GB 1333 MHz DDR3 Graphics: AMD Radeon HD 6770M 1024 MB Software: Mac OS X Lion 10.7.3 Main Drive Bay: Intel 520-series 180GB SATA-3 (6GB/s negotiated link) SSD (Firmware: 400i) [80GB free] Optical Bay: Toshiba 5400 RPM 750GB SATA-2 HDD Trim: Enabled (according to Trim Enabler App) And here are the speeds I'm getting: Read: 412 MB/s Write: 186 MB/s What have I done wrong? Results expected: Read/write both 500MB/s I have seen benchmarks with lesser SSD:s (SATA-2 even) outperform my write-speeds by far. Also, Intel 520 SSD:s are supposed to be the top class of SSD:s. Trim Enabler report: This looks a bit odd compared to screenshots from their site: These is the defined S.M.A.R.T attributes (taken from Intel): And here are my S.M.A.R.T attributes read using smartctl tool from smartmontools: They don't seem very compatible. I'm going to try and look for a S.M.A.R.T attributes reader tool for OS X which might support Intel 520 series.

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  • SQL Server not releasing Memory

    - by noob2487
    I am using SQL Server 2005. I am running a job which processes around 100 K records. Job runs fine, it takes are 45 mins to execute, which is good. But after that job is processed, I can see instance of SQL Server 2005 still there with around 900 MB of Memory. I waited for around 2 hrs but that memory was not released. Is there any process which takes care of memory here, something like GC (unpredictable) Or am I doing something wrong???

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  • How to test server throughput

    - by embwbam
    I've always used apache benchmark to try to get a rough idea of how many requests/second my server can handle. I read that it was good, and it seemed to work well. Enter node.js, which is fully event-based, so it never blocks. If I run apache benchmark on a simple hello world server it can handle 2500 requests per second or so. However, if I put a timeout in the hello world function, so that it responds after 2 seconds, apache benchmark reports a dramatically reduced throughput: about 50/s. I'm running 100 concurrent connections with ab. If I increase the concurrency, it goes up. This makes sense, because apache benchmark is basically sending out requests in batches of 100, which come back every 2 seconds. 100 requests / 2 seconds = 50 requests / second If I increase the concurrency to about 400 or 500, it starts to crash. I don't think I've hit node.js's limit, I think I'm hitting a wall in my operating system on the number of open file descriptors or sockets or something. Any way I can get a good guess about how many requests my server can handle? I want to make sure the test computer isn't the one causing the problem.

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