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  • Mac download speed keeps decreasing

    - by hatorade
    I have a Mac that is getting extremely low connection speed from my WiFi. The other 3 computers in this house have a fast connection. However, on this Mac, once I connect to WiFi it's fast, but as time goes on the speed decreases dramatically. I thought it was the browser or something (Safari) so I downloaded Firefox, but I have watched the download speed decrease consistently as time goes by and right now it's at 8kb/sec instead of the 60-200 range it started at. Any suggestions?

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  • Windows Server 2008 R2 slows internet speed

    - by Tone
    I just installed Windows Server 2008 R2 as my main file server on my home network. I've noticed that often times when I start my day my internet connection speed is slow. I'll go to Speakeasy speed test and it'll be at about 25% of its normal speed. When I restart my Server 2008 machine it increases back to normal. It will stay normal until Server 2008 has been running for a while. Any ideas? Edit: I had installed Collabnet Subversion within the past week which installs/sets up some other stuff for web access, I just uninstalled it. I'll report back tomorrow if that fixed my problem.

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  • Fedora12 Slow USB 2.0 Write Speed, ehci_hcd module is missing

    - by MA1
    I am using Fedora 12, the problem I am facing is USB 2.0 write speed. I have a dual boot system with Windows XP and Fedora 12. USB 2.0 write speed in Windows XP is much faster then what I am getting in Fedora 12. After searching Google I came to know that ehci_hcd module is missing/not present in my system. ehci_hcd module is neither loaded nor it is present in the available list of modules. Can someone guide me how to fix this issue? Does ehci_hcd have something to do with USB 2.0 write speed? Do I have to recompile the kernel and add/enable the ehci_hcd module?

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  • how to test lan network speed with ps3

    - by Damon
    I am having a heck of a time trying to get videos streaming to my PS3. I want to know if there is some way to test the speed between my PC and ps3 to see if that is the issue. For some reason when things get really slow between the ps3 and my computer (it's a wired connection through a switch), the wireless internet on completely different computer gets slow. I don't know what's causing what, but I don't know why there should be any correlation between internet speed on a wirelessly connected laptop and the LAN speed between a wired ps3 and computer.

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  • Test site speed

    - by Elad Lachmi
    I am test driving an Akmai CDN architecture and before committing to buy, I would like to gauge the real performance gain from the acceleration feature. What would be the best MO for doing speed tests from different locations around the world? I would like to test the page load speed and not just the server response time. I would like to test speed from as many edge locations as possible. I do not mind a paid service as well, if it is optimal. Thank you!

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  • Does lshw list the "factory" speed of a memory module or the effective speed and how to find the former?

    - by Panayiotis Karabassis
    I hope I phrased this correctly. lshw gives: description: DIMM Synchronous 400 MHz (2.5 ns) product: M378B5773CH0-CH9 vendor: Samsung physical id: 0 slot: DIMM0 size: 2GiB width: 64 bits clock: 400MHz (2.5ns) And indeed the memory speed is set is set to 800MHz in the BIOS, which I think makes sense since it is a double rate. On the other hand, Googling strongly suggests that to this product number corresponds the PC3-10600 type, which is 1333MHz, not 800MHz. And this seems to be confirmed in the BIOS, where if I select Auto for memory bus speed, 1333MHz is selected "based on SPD settings". However in the latter case, the computer does not boot, i.e. the kernel panics, complaining that something attempted to kill the Idle process. So, I am I am beginning to suspect that I have been given defective memory, the technician that installed saw this, and lowered the bus speed. Is this a possibility?

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  • SSH sometimes screws up connection when terminal overflows?

    - by SeveQ
    I've got a problem with SSH on a Debian Lenny based server (it's a vHost within a Xen environment, booted on a Xen kernel). I hope someone can help me with this. The SSH connection seems somehow getting screwed up frequently when the terminal overflows (new lines beyond the bottom of the terminal, usually forcing it to scroll). The connection gets lost but not regularly disconnected. It nearly always happens when I do the following: an existing SSH connection gets disconnected (regularly) I order putty to reestablish the connection login-prompt appears at the very bottom of the putty terminal window I enter my login-name, press the enter key I'm asked for the password, I enter it, press the enter key and BOOM! Nothing more happens. I have to reconnect again. So it is reproducable. I'm not totally sure if the connection crashes before or after I enter the password. Furthermore it also happens when there is much text to be displayed (for example when I compile something or do an ls -l on a directory with many entries). Using 'screen', however, helps to reduces the frequency of occurence but doesn't solve the problem completely. It's occurence is independent from which terminal software I use. I mostly use putty but it also happens with other clients. I certainly hope somebody can help me solving this problem. Thanks in advance! //edit: I've just made a Wireshark trace of the ssh connection and there is nothing, I repeat, nothing different between the working and the failing connection (at least aside from frame numbers, ports and times that obviously can't be equal). This leads me to the assumption that the error has to happen on the server's side.

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  • Relationship between RAM & processor speed

    - by deostroll
    RAM is just used for temporary storage. But since this storage is in the cpu memory (RAM) it is fast. Programs can easily read/write values into it. I've noticed more the RAM less time it takes for the application to load/execute. But doesn't this actually depend of the processor speed (MHz or GHz values). I am wondering what is the science/relationship between processor speed and RAM.

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  • Low USB transfer speed

    - by dhasu
    Hello, I am using Windows Vista, my Motherboard is Intel D102GGC2 The transfer speed through USB is very slow on my PC, just 2-3 MBps... I also use Ubuntu 9.10, and surprisingly the USB transfer speed is as expected, ie 16-17 MBps. So everytime i have to transfer Huge files i have to reboot into Ubuntu. What might be the Problem ??? I checked the Intel website for the ubdated drivers for my mobo, but they dont support my mobo now. Thanks

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  • VPS Hosting Transfer Speed Question

    - by user31983
    Hi. I bought a VPS hosting(Bandwidth 500G) at US, and i connect it from China. How to improve the transfer speed when I connected my VPS hosting using WinSCP tool. I found the speed is very slow, just several huandard B/s some time. What's the meaning of Bandwidth 500G? It means the traffict limited? thank you.

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  • How to throttle bandwidth speed from VPS

    - by Burning the Codeigniter
    I was wondering if you can throttle/boost the download speed from my VPS to me, because now and often I download a database which is quite big, typically 5-7GB. My side is quite slow (typically I have max speeds of 100Kb/s) so I was wondering if it's possible to throttle the bandwidth speed from my server to me that it could make the download much faster. If this is possible, how can I do this? My server is running Ubuntu 11.04 with a 100Mbps line.

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  • PPTP connection fails with errors 800/806

    - by Mark S. Rasmussen
    I've got a client (Server 2008 R2) that won't connect to our production environment PPTP VPN server (Server 2003, running RRAS). The server is behind a firewall that has TCP1723 open as well as GRE. Other clients at our office are able to connect just fine. Our office is behind a Juniper SSG5-Serial firewall, but all outgoing traffic is allowed, and multiple other clients are able to connect to VPN servers without issues. I've also setup a completely different VPN server on another network outside of our office. The functioning clients connect just fine - the Server 2008 R2 machine doesn't. Thus it's definitely a problem with this machine in particular. I've rebooted it. I've disabled the firewall, no dice on either. I've run PPTPSRV and PPTPCLNT on the server/client and they're able to communicate perfectly - indicating there's no problem using neither TCP1723 nor GRE. The Server 2008 R2 machine is also running as a VPN server itself (incoming connection) and that's working perfectly. We have the issues no matter if there are active incoming connections or not. I'm not sure what my next debugging step would be; any suggestions? EDIT: The event log on the server has the following warning from RasMan: A connection between the VPN server and the VPN client xxx.xxx.xxx.xxx has been established, but the VPN connection cannot be completed. The most common cause for this is that a firewall or router between the VPN server and the VPN client is not configured to allow Generic Routing Encapsulation (GRE) packets (protocol 47). Verify that the firewalls and routers between your VPN server and the Internet allow GRE packets. Make sure the firewalls and routers on the user's network are also configured to allow GRE packets. If the problem persists, have the user contact the Internet service provider (ISP) to determine whether the ISP might be blocking GRE packets. Obviously this points to GRE being a potential problem. But seeing as I have other clients connectiong without problems, as well as PPTPSRV and PPTPCLNT being able to communicate, I'm suspecting this might be a red herring. EDIT: Here are the anonymized events logged by the client in chronological order: CoId={742CB15C-A7E0-47B7-8240-0EFA1139CBD9}: The user XXX\YYY has started dialing a VPN connection using a per-user connection profile named ZZZ. The connection settings are: Dial-in User = XXX\YYY VpnStrategy = PPTP DataEncryption = Require PrerequisiteEntry = AutoLogon = No UseRasCredentials = Yes Authentication Type = CHAP/MS-CHAPv2 Ipv4DefaultGateway = No Ipv4AddressAssignment = By Server Ipv4DNSServerAssignment = By Server Ipv6DefaultGateway = Yes Ipv6AddressAssignment = By Server Ipv6DNSServerAssignment = By Server IpDnsFlags = Register primary domain suffix IpNBTEnabled = Yes UseFlags = Private Connection ConnectOnWinlogon = No. CoId={742CB15C-A7E0-47B7-8240-0EFA1139CBD9}: The user XXX\YYY is trying to establish a link to the Remote Access Server for the connection named ZZZ using the following device: Server address/Phone Number = XXX.YYY.ZZZ.KKK Device = WAN Miniport (PPTP) Port = VPN3-4 MediaType = VPN. CoId={742CB15C-A7E0-47B7-8240-0EFA1139CBD9}: The user XXX\YYY has successfully established a link to the Remote Access Server using the following device: Server address/Phone Number = XXX.YYY.ZZZ.KKK Device = WAN Miniport (PPTP) Port = VPN3-4 MediaType = VPN. CoId={742CB15C-A7E0-47B7-8240-0EFA1139CBD9}: The link to the Remote Access Server has been established by user XXX\YYY. CoId={742CB15C-A7E0-47B7-8240-0EFA1139CBD9}: The user XXX\YYY dialed a connection named ZZZ which has failed. The error code returned on failure is 806. Running Wireshark on the client shows it trying and retrying to send a "71 Configuration Request" While the server shows the incoming client requests, but apparently without replying: Given that this is GRE traffic, I think rules out the GRE traffic being blocked. Question is, why doesn't the server reply? This is the Configuration Request the server receives from the non functioning client (meaning no response is sent to the client request): And this is the Configuration Request the server receives from the working client: To me they seem identical, except for differing keys and magic numbers, and the fact that one client receives a response while the other doesn't.

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  • Enable: Asp.net connection pool monitoring with performance monitor

    - by BlackHawkDesign
    If this question is at the wrong forum, be free to tell me. I'm a c# developer, but I'm running in a system management issue here. Intro: Im suspecting that an asp.net application is having some issues with the connection pool and that the pool is flooding from time to time. So to make sure, I want to monitor the connection pool. After some searching I found this article : http://blog.idera.com/sql-server/performance-and-monitoring/ensure-proper-sql-server-connection-pooling-2/ Basicly it explains stuff about connection pools and how you can monitor the application pool with performance monitor. The problem: So I logged in to the asp.net server(The sql database is hosted on a different server) which hosts the website. Started performance monitor. But when I want to select 'Current # pooled and nonpooled connections', I have no instance to select. There fore I can't add it. Question How can I create/supply an instance so I can monitor the connection pool? Thanks in advance BHD

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  • File download speed issue over a dedicated fibre link

    - by nixnotwin
    My ISP has installed a fibre based dedicated internet connection at the place where I work. In the beginning the connection terminated at one of the ISP's core routers. It resulted in a strange issue. Eventhough the assigned speed was 5mbps, when tests were done by downloading large files over http and ftp from multiple locations, the speed never went above 2mbps. But bittorrent downloads reached 5mbps. Even file download from the ISP servers were fine. So, at the ISP our link was attached directly to their edge router. After this file downloads from high bandwidth servers, like Google and MS, reached the 5 mbps limit. Sometimes the speed would fall down below 2 mbps and suddenly it will go up to the 5 mbps limit ( it keeps on happening during any single file download). But other downloads like ubuntu apt repositories still struggle to go above 2 mbps. The engineers at the ISP have not been able to sort out the issue. After they moved us to their edge router instead of giving us 8 public ip's, they just gave 4 ip's. When we enquired about it, they told us that giving more ip's would result in arp overload at their edge router. But somehow I was able to convince them to give us the 8 ip's which we wanted. But the file download issue has remained. What might be the reason for files from different location getting downloaded with different speeds, that too with heavy fluctuation in speeds? I have downloaded files from same url's from a connection belonging to another smaller ISP, and the speeds were fine and reached full 5 mbps limit.

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  • Windows 7 Cable Connection Rehabilitation

    - by Giovanni De Gaetano
    I recently switched the operating system of my laptop from Windows XP to Windows 7. My web-connection is such that I need to identify everytime before connecting. Since there is no automatic identification request, while using Windows XP I was used to de-abilitate and rehabilitate the cable connection after every switching on. I successfully installed the web-connection on Windows 7, and later on I switched the computer off and on (simply because I had to sleep!). After restarting the computer, since there was no automatic identification request, I de-abilitate the cable connection. But this time I didn't find any way to rehabilitate it! Do you have any suggestions on how to solve the problem? My "Wired AutoConfiguration" has the startup type "Automatic", but it's not enough to restart automatically the cable connection! I tried to do some standard things like restart the computer, unplug and plug in again the cable, reinstall the web-connection from the scratch... But nothing worked! Thank you very much for your help!

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  • Router drops internet connection if I connect an additional pc

    - by BluePerry
    Hey, I'm using a SMC2804WBRP-G router connected to my ADSL-modem. Usually there are two computers connected to this router: a win7 ultimate desktop(wired) and a macbook air (wireless). Both working absolutely fine and never caused any connection drops as far as I know. A new room mate moved in last month and each time she starts up her win7 home laptop the router looses the internet connection. The laptop is on a wired connection. The first time she connected to my router, the connection dropped every 2 mins. To find out whats wrong with her machine I disabled all unnecessary services etc. besides the anti virus software. That helped to eliminate almost all of those periodic connection drops. But the start up drop remained and I've got the feeling that the router is still loosing connection from time to time. I haven't had the time to find out what service caused the periodic drops. But I'm more concerned about is that start up drop. Can anyone point me in the right direction to look for the problem? I would be very thankful for any hints or tips!

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  • how Infiniband speed is related to processor speed

    - by user223231
    I have two exactly the same servers and very curious how to make Infiniband interconnection between them? Both servers' basic specs are: CPU: 32GHz = 2x Intel Xeon X5650, 6 core, 2.66GHz and RAM: 24GB per server (edited) How determine what speed of Infiniband will be enough for perfect interconnection? SDR, DDR, QDR or FDR? My logic is 32Ghz = 32Gb/s and 40Gb one is enough, am I right or it is not that simple?

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  • Cannot connect to MySQL over TCP locally - Connection Timeout - Ubuntu 9.04

    - by gav
    I am running Ubuntu and am ultimately trying to connect Tomcat to my MySQL database using JDBC. It has worked previously but after a reboot the instance now fails to connect. Both Tomcat 6 and MySQL 5.0.75 are on the same machine Connection string: jdbc:mysql:///localhost:3306 I can connect to MySQL on the command line using the mysql command The my.cnf file is pretty standard (Available on request) has bind address: 127.0.0.1 I cannot Telnet to the MySQL port despite netstat saying MySQL is listening I have one IpTables rule to forward 80 - 8080 and no firewall I'm aware of. I'm pretty new to this and I'm not sure what else to test. I don't know whether I should be looking in etc/interfaces and if I did what to look for. It's weird because it used to work but after a reboot it's down so I must have changed something.... :). I realise a timeout indicates the server is not responding and I assume it's because the request isn't actually getting through. I installed MySQL via apt-get and Tomcat manually. MySqld processes root@88:/var/log/mysql# ps -ef | grep mysqld root 21753 1 0 May27 ? 00:00:00 /bin/sh /usr/bin/mysqld_safe mysql 21792 21753 0 May27 ? 00:00:00 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --skip-external-locking --port=3306 --socket=/var/run/mysqld/mysqld.sock root 21793 21753 0 May27 ? 00:00:00 logger -p daemon.err -t mysqld_safe -i -t mysqld root 21888 13676 0 11:23 pts/1 00:00:00 grep mysqld Netstat root@88:/var/log/mysql# netstat -lnp | grep mysql tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 21792/mysqld unix 2 [ ACC ] STREAM LISTENING 1926205077 21792/mysqld /var/run/mysqld/mysqld.sock Toy Connection Class root@88:~# cat TestConnect/TestConnection.java import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class TestConnection { public static void main(String args[]) throws Exception { Connection con = null; try { Class.forName("com.mysql.jdbc.Driver").newInstance(); System.out.println("Got driver"); con = DriverManager.getConnection( "jdbc:mysql:///localhost:3306", "uname", "pass"); System.out.println("Got connection"); if(!con.isClosed()) System.out.println("Successfully connected to " + "MySQL server using TCP/IP..."); } finally { if(con != null) con.close(); } } } Toy Connection Class Output Note: This is the same error I get from Tomcat. root@88:~/TestConnect# java -cp mysql-connector-java-5.1.12-bin.jar:. TestConnection Got driver Exception in thread "main" com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 1 milliseconds ago. The driver has not received any packets from the server. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at com.mysql.jdbc.Util.handleNewInstance(Util.java:409) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1122) at TestConnection.main(TestConnection.java:14) Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at com.mysql.jdbc.Util.handleNewInstance(Util.java:409) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1122) at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:344) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2181) ... 12 more Caused by: java.net.ConnectException: Connection timed out at java.net.PlainSocketImpl.socketConnect(Native Method) ... 13 more Telnet Output root@88:~/TestConnect# telnet localhost 3306 Trying 127.0.0.1... telnet: Unable to connect to remote host: Connection timed out

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  • SQL connection to database repeating

    - by user175084
    ok now i am using the SQL database to get the values from different tables... so i make the connection and get the values like this: DataTable dt = new DataTable(); SqlConnection connection = new SqlConnection(); connection.ConnectionString = ConfigurationManager.ConnectionStrings["XYZConnectionString"].ConnectionString; connection.Open(); SqlCommand sqlCmd = new SqlCommand("SELECT * FROM Machines", connection); SqlDataAdapter sqlDa = new SqlDataAdapter(sqlCmd); sqlCmd.Parameters.AddWithValue("@node", node); sqlDa.Fill(dt); connection.Close(); so this is one query on the page and i am calling many other queries on the page. So do i need to open and close the connection everytime...??? also if not this portion is common in all: DataTable dt = new DataTable(); SqlConnection connection = new SqlConnection(); connection.ConnectionString = ConfigurationManager.ConnectionStrings["XYZConnectionString"].ConnectionString; connection.Open(); can i like put it in one function and call it instead.. the code would look cleaner... i tried doing that but i get errors like: Connection does not exist in the current context. any suggestions??? thanks

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  • HP SmartArray P400 has slow read and write speed

    - by Tadas D.
    I have desktop in which I installed HP SmartArray P400 controller with two HP DF0146B8052 hard drives. I made RAID0 logical volume from them, but I am getting 20MB/s write speed and ~140-120MB/s read speed. Also there is quite low scatter for benchmark results (I am getting quite nice line) and it looks like controller is "capping" my speeds. I tried reseting controllers configuration and I haven't found any settings in HP ACU (Array Configuration Utility) to help me. I am using Windows 7 Ultimate and M4A78 board Does anyone have ideas what could be wrong? Also I am attaching diagnostic results.

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  • Can I speed up cygwin's fork?

    - by Andrew Aylett
    I came across a post discussing the speed of forking in Cygwin, giving an expected 'fork rate' in Windows XP of around 30-50 per-second (link) I've got a Core 2 duo (1.79GHz) which I would expect to get comparable results, but it's only managing around 8 forks per second (and sometimes a lot fewer): $ while (true); do date --utc; done | uniq -c 5 Wed Apr 21 12:38:10 UTC 2010 6 Wed Apr 21 12:38:11 UTC 2010 1 Wed Apr 21 12:38:12 UTC 2010 1 Wed Apr 21 12:38:13 UTC 2010 8 Wed Apr 21 12:38:14 UTC 2010 8 Wed Apr 21 12:38:15 UTC 2010 6 Wed Apr 21 12:38:16 UTC 2010 1 Wed Apr 21 12:38:18 UTC 2010 9 Wed Apr 21 12:38:19 UTC 2010 Can you suggest anything I might be able to do to speed things up? This machine acts a lot slower in Cygwin than others I've used before which actually were a lot slower.

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