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• How can I calculate power consumption of my PC in Watt?

  - by Jitendra vyas

  How can I calculate power consumption of my PC in Watt, to prove my House owner ( I live on rent) , my PC doesn't consume much power? He blames me for Huge power bills even he too use Fridge, A.C. etc and his son watch the TV all the time. We both share one Power meter so for bill we pay 50%-50% but He is saying I use PC all the time even night i keep on for downloading. I just want to calculate power consumption of my PC then will calculate monthly expense of unit as per my City's per unit price for power. I've Windows: Microsoft Windows XP Professional 5.1.2600 Service Pack 3 Memory (RAM): 960 MB CPU Info: AMD Sempron(tm) Processor 2500+ CPU Speed: 1399.0 MHz Sound card: Vinyl AC'97 Audio (WAVE) Display Adapters: VIA/S3G UniChrome Pro IGP | NetMeeting driver | RDPDD Chained DD Monitors: 1 - 17inch LCD - LG Screen Resolution: 1280 X 768 - 32 bit Network: Network Present Network Adapters: Bluetooth Device (Personal Area Network) #2 | WAN (PPP/SLIP) Interface CD / DVD Drives: I: ELBY CLONEDRIVE COM Ports: COM1 | COM2 | COM7 | COM8 | COM9 | COM10 LPT Ports: LPT1 Mouse: 3 Button Wheel Mouse Present Hard Disks: C: 29.3GB | D: 29.3GB | E: 97.7GB | F: 97.7GB | G: 211.9GB USB Controllers: 5 host controllers. Firewire (1394): 1 host controllers. Manufacturer: Phoenix Technologies, LTD Product Make: MS-7142 AC Power Status: OnLine BIOS Info: AT/AT COMPATIBLE | 01/18/06 | VIAK8M - 42302e31 Motherboard: MICRO-STAR INTERNATIONAL CO., LTD MS-7142 Modem: ZTE USB Modem FFFE CDMA #2

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• Openfiler iSCSI performance

  - by Justin

  Hoping someone can point me in the right direction with some iSCSI performance issues I'm having. I'm running Openfiler 2.99 on an older ProLiant DL360 G5. Dual Xeon processor, 6GB ECC RAM, Intel Gigabit Server NIC, SAS controller with and 3 10K SAS drives in a RAID 5. When I run a simple write test from the box directly the performance is very good: [root@localhost ~]# dd if=/dev/zero of=tmpfile bs=1M count=1000 1000+0 records in 1000+0 records out 1048576000 bytes (1.0 GB) copied, 4.64468 s, 226 MB/s So I created a LUN, attached it to another box I have running ESXi 5.1 (Core i7 2600k, 16GB RAM, Intel Gigabit Server NIC) and created a new datastore. Once I created the datastore I was able to create and start a VM running CentOS with 2GB of RAM and 16GB of disk space. The OS installed fine and I'm able to use it but when I ran the same test inside the VM I get dramatically different results: [root@localhost ~]# dd if=/dev/zero of=tmpfile bs=1M count=1000 1000+0 records in 1000+0 records out 1048576000 bytes (1.0 GB) copied, 26.8786 s, 39.0 MB/s [root@localhost ~]# Both servers have brand new Intel Server NIC's and I have Jumbo Frames enabled on the switch, the openfiler box as well as the VMKernel adapter on the ESXi box. I can confirm this is set up properly by using the vmkping command from the ESXi host: ~ # vmkping 10.0.0.1 -s 9000 PING 10.0.0.1 (10.0.0.1): 9000 data bytes 9008 bytes from 10.0.0.1: icmp_seq=0 ttl=64 time=0.533 ms 9008 bytes from 10.0.0.1: icmp_seq=1 ttl=64 time=0.736 ms 9008 bytes from 10.0.0.1: icmp_seq=2 ttl=64 time=0.570 ms The only thing I haven't tried as far as networking goes is bonding two interfaces together. I'm open to trying that down the road but for now I am trying to keep things simple. I know this is a pretty modest setup and I'm not expecting top notch performance but I would like to see 90-100MB/s. Any ideas?

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• PBS batch jobs - the qalter command

  - by Ryan Budney

  I've got a giant computation running on a Scientific Linux cluster. At present I have over 600 jobs parked in the queue, waiting for processor time, while a few are running. I'm trying to use the qalter command on some of the idle but scheduled jobs. I'd like to schedule them for a later time, so that other users can jump part of the queue, sort of as an act of politeness. Is this doable? For example, JOBNAME 292399 is currently idle, scheduled to be run whenever a spot in the queue opens up. But if I run qalter -a 10051000 292398 followed by qrerun 292398 I get qrerun: Request invalid for state of job 292398.euler. From the qalter documentation, I thought 10051000 refers to tomorrow (oct 5th, 10am) but perhaps I'm misunderstanding something? If I'm going about this the wrong way, please let me know. The main thing I'm looking for is a command that's easily scriptable, so that I can modify when my queued tasks get run. qalter seems good for those purposes if I can get it working. I'd rather avoid running qdel and re qsubbing the computations, as there's a bookkeeping issue on which tasks to restart (vs which ones not to). I want to avoid that kind of bookkeeping. From googling around I notice some qalter commands have rather different date formats, but the above appears to be correct, as far as I can tell from the man docs. Any help would be appreciated.

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• Hardware Requirements & Tuning - Flash Media Server 3.5 Interactive

  - by Anthony Kanago

  I am trying to spec out a server to purchase (physically, not rented from someone like softlayer.com) to run an intranet instace of Flash Media Server 3.5 Interactive. In general, the server will likely be fielding somewhere on the order of 400 connections at a time at the upper limit. Of course, should this increase, we don't want to be stuck. While the decision is not final, we will likely be running the server on Red Hat rather than Windows. The server will be run on gigabit ethernet. I have two related questions: What sort of hardware would I need realistically to support this? What advice can you offer for settings in tuning FMS/the OS to be performant to this level? We are looking for a bare minimum that will run this effectively to save on costs. Realistically, the average number of connections will be fairly low (50-150) by comparison with that upper limit estimate. To reiterate: we just want to be cautious in not getting caught when we need more power, but we also need a low-cost solution (doesn't everyone?) and that may take priority. Windows and RedHat are the two officially supported operating systems. Since FMS is stated to be 32-bit only, I'm sticking with a 32-bit OS. The hardware requirements listed by Adobe on their website are: 3.2GHz Intel® Pentium® 4 processor (dual Intel Xeon® or faster recommended) 2GB of RAM (4GB recommended) 1Gb Ethernet card So what realistically do I need for those sorts of connection numbers, and what can I due to tune things up to get more out of less hardware? Thanks!

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• Poor NFS Performance: OpenFiler

  - by Safin09

  Good Day Everyone, I have an issue with OpenFiler, a Linux-based operating that converts a computer system into a SAN/NAS appliance. Here is the problem. In my environment we have two Netapp Storevault 500 appliances that I normally perform backups to a NFS share. There are two backup cronjobs that use ghettoVCB to backup two groups of VM's. One group is a pool of 3 VMs. This takes 13 mins to complete. A second job that backups a pool of 5 VMs to a 2nd Storevault appliance which takes 2 hours. We then installed Openfiler on a old server that has 2 core Xeon processors. There is a software RAID 5 process in place. When performing the same backups to a NFS Openfiler share, the first backup job, which takes 13 mins, takes around 4 hours. The second backup job, which takes 2 hours, takes almost 10 hours to complete. This is unacceptable!!!! Especially considering the strain placed on the host ESX Server. I assumed that because of the software RAID 5, the overhead on the CPU explained the long backup times. I then installed Openfiler on a 2nd server, an IBM x306 machine which has a P4 Intel processor. This time no software RAID or any RAID at all. A single 750GB hard drive that contained the OS and the rest of the disk uses to backup VMs to a NFS share. I performed the first backup job of the pool of 3 VMs. This time the backup job took 1 and 1/2 hours to complete instead of 13 mins!!!!!!!!!! Is Openfiler simply poor at being an NFS Server!!!!!!!!!!!!! Has anyone else had these issues with Openfiler?

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• Making OpenSSL work on PHP Windows 2008 server with FastCGI

  - by KacieHouser

  I have been researching all day. Here is what I have done: In C:/PHP/php.ini and C:/PHP/php-cgi-fcgi.ini I have made the extension_dir = "C:/PHP/ext" I uncommented extension=php_openssl.dll I went to http://windows.php.net/download/ and got the thread safe version with the PHP 5.4 (5.4.8) version of DLL's In C:/PHP/ext I replaced the php_openssl.dll with the one I downloaded In System32 and SysWOW64 I added the following DLL's ssleay.dll libeay.dll I restarted the IIS server in the Server Manager under Web Server and stopped and started the World Wide Web Publishing Service That didn't work, so I tried same thing with the unthreaded versions. I still get: Fatal error: Call to undefined function ftp_ssl_connect() in C:\inetpub\wwwroot\REMOVED_dev\save_data.php on line 5 Here are related things from phpinfo(): System Windows NT DEV-WEB1 6.1 build 7601 (Windows Server 2008 R2 Standard Edition Service Pack 1) i586 Compiler MSVC9 (Visual C++ 2008) Architecture x86 Configure Command cscript /nologo configure.js "--enable-snapshot-build" "--enable-debug-pack" "--disable-zts" "--disable-isapi" "--disable-nsapi" "--without-mssql" "--without-pdo-mssql" "--without-pi3web" "--with-pdo-oci=C:\php-sdk\oracle\instantclient10\sdk,shared" "--with-oci8=C:\php-sdk\oracle\instantclient10\sdk,shared" "--with-oci8-11g=C:\php-sdk\oracle\instantclient11\sdk,shared" "--with-enchant=shared" "--enable-object-out-dir=../obj/" "--enable-com-dotnet" "--with-mcrypt=static" "--disable-static-analyze" "--with-pgo" Server API CGI/FastCGI Configuration File (php.ini) Path C:\Windows Loaded Configuration File C:\PHP\php-cgi-fcgi.ini Scan this dir for additional .ini files (none) Additional .ini files parsed (none) Registered PHP Streams php, file, glob, data, http, ftp, zip, compress.zlib, compress.bzip2, https, ftps, sqlsrv, phar Registered Stream Socket Transports tcp, udp, ssl, sslv3, sslv2, tls FTP support enabled Protocols dict, file, ftp, ftps, gopher, http, https, imap, imaps, ldap, pop3, pop3s, rtsp, scp, sftp, smtp, smtps, telnet, tftp openssl OpenSSL support enabled OpenSSL Library Version OpenSSL 0.9.8t 18 Jan 2012 OpenSSL Header Version OpenSSL 0.9.8x 10 May 2012 What am I missing here?

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• Looking for updated BIOS for '99 Gateway in order to format/recognize >127 GB HD

  - by Jeff

  I have a '99 Gateway that's apparently too old for even Gateway to acknowledge it exists. Want to use it as a media hub and put in a 320GB HD, but it will not format above 127GB even running Win XP SP3. Read somewhere that upgrading the BIOS may do the trick, but I can't find the correct BIOS, and GW has been no help. Hoping I can just upgrade the BIOS, which is 11 years old. Any help would be much appreciated! I don't know where to look, and searches have been fruitless. System info: OS Name Microsoft Windows XP Home Edition Version 5.1.2600 Service Pack 3 Build 2600 OS Manufacturer Microsoft Corporation System Name xxxx System Manufacturer Gateway System Model TABOR_II System Type X86-based PC Processor x86 Family 6 Model 7 Stepping 3 GenuineIntel ~596 Mhz BIOS Version/Date Intel Corp. 4W4SB0X0.15A.0015.P10, 9/28/1999 SMBIOS Version 2.1 BIOS info (from a free app I located): BIOS Type: Phoenix BIOS Date: September 28th 1999 BIOS ID: 4W4SB0X0.15A.0015.P10.9909281445-None BIOS OEM: 4W4SB0X0.15A.0015.P10 Chipset: Intel 440BX/ZX rev 3 SuperIO: SMC 70x or 80x rev 0 at port 0370 Manufacturer: Gateway Motherboard: WS440BX

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• Disabling CPU management

  - by Tiffany Walker

  If I add the following processor.max_cstate=0 to the kernel command line for boot up, does that disable all CPU power management and throttling? I also found: http://www.experts-exchange.com/OS/Linux/Administration/A_3492-Avoiding-CPU-speed-scaling-in-modern-Linux-distributions-Running-CPU-at-full-speed-Tips.html The link talks of Change CPU governor from 'ondemand' to 'performance' for all CPUs/cores and disabling kondemand from kernel. Server is for web hosting UPDATES: 2.6.32-379.1.1.lve1.1.7.6.el6.x86_64 #1 SMP Sat Aug 4 09:56:37 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux . # dmidecode 2.11 SMBIOS 2.6 present. 74 structures occupying 2878 bytes. Table at 0x0009F000. Handle 0x0000, DMI type 0, 24 bytes BIOS Information Vendor: American Megatrends Inc. Version: 1.0c Release Date: 05/27/2010 Address: 0xF0000 Runtime Size: 64 kB ROM Size: 4096 kB Characteristics: ISA is supported PCI is supported PNP is supported BIOS is upgradeable BIOS shadowing is allowed ESCD support is available Boot from CD is supported Selectable boot is supported BIOS ROM is socketed EDD is supported 5.25"/1.2 MB floppy services are supported (int 13h) 3.5"/720 kB floppy services are supported (int 13h) 3.5"/2.88 MB floppy services are supported (int 13h) Print screen service is supported (int 5h) 8042 keyboard services are supported (int 9h) Serial services are supported (int 14h) Printer services are supported (int 17h) CGA/mono video services are supported (int 10h) ACPI is supported USB legacy is supported LS-120 boot is supported ATAPI Zip drive boot is supported BIOS boot specification is supported Targeted content distribution is supported BIOS Revision: 8.16 Handle 0x0001, DMI type 1, 27 bytes System Information Manufacturer: Supermicro Product Name: X8SIE Version: 0123456789 Serial Number: 0123456789 UUID: 49434D53-0200-9033-2500-33902500D52C Wake-up Type: Power Switch SKU Number: To Be Filled By O.E.M. Family: To Be Filled By O.E.M. Handle 0x0002, DMI type 2, 15 bytes Base Board Information Manufacturer: Supermicro Product Name: X8SIE Version: 0123456789 Serial Number: VM11S61561 Asset Tag: To Be Filled By O.E.M. Features: Board is a hosting board Board is replaceable Location In Chassis: To Be Filled By O.E.M. Chassis Handle: 0x0003 Type: Motherboard Contained Object Handles: 0 Handle 0x0003, DMI type 3, 21 bytes Chassis Information Manufacturer: Supermicro Type: Sealed-case PC Lock: Not Present Version: 0123456789 Serial Number: 0123456789 Asset Tag: To Be Filled By O.E.M. Boot-up State: Safe Power Supply State: Safe Thermal State: Safe Security Status: None OEM Information: 0x00000000 Height: Unspecified Number Of Power Cords: 1 Contained Elements: 0

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• Memory leak in Google Chrome

  - by jasondavis

  As a developer it is very common for me to have 2-3 different IDE's open, 10-15 google chrome windows which can hold up to 200 open tabs (I know I get out of hand some times), Photoshop, couple twitter bots for promo, and a few other programs but my system still runs fast and smooth. I have an i7 processor with 12gb ram. Now with all my usual stuff running my Physical memory is usually running around 50-60% however over the course of the day or much less even, I will gradually grow to 98% The highest Memory usage processes will be from Google Chrome, if I sort in the task manager by highest memory usage and end the 1 highest process which will be a google chrome one, my memory usage will jump back down to about 60%. Also by ending that 1 process, all my Chrome windows will remain open and in use, so it doesn't affect me at all by ending that process. Based on this research I am assuming that that 1 runaway process is likely the Adobe Flash as I also can say that it gets up to the 98% much faster when I am using flash items like video or music player. But even without using any of them it will still climb up to that high number eventually. Has anyone else experienced similar results?

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• process and memory issue on linux server

  - by zapping

  Need some assistance in analyzing apache and php process running on linux server. Its a 8-core intel processor with 4GB ram. When the website on it runs the top displays like this. PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 23459 username1 16 0 151m 27m 8388 S 11.3 0.7 0:11.71 php5 23730 username1 16 0 151m 28m 8388 S 11.3 0.7 0:03.87 php5 23458 username1 16 0 151m 28m 8388 S 3.0 0.7 0:19.20 php5 16202 mysql 15 0 459m 38m 4624 S 0.7 1.0 62:33.81 mysqld 24141 nobody 15 0 311m 5832 2304 S 0.3 0.1 0:00.03 httpd Why does the command say php5 when the website is accessed. Both apache and php was preconfigured so not sure whats done there. Tried setting up the same site and db on a different server but on it the process shows httpd always and not php5. The site uses mysql db. The problem is server load seems to go till about 5.x when the website was access by about 16users. When the free -m command was given the output shows total used free shared buffers cached Mem: 3941 3727 213 0 236 2734 -/+ buffers/cache: 756 3184 Swap: 4095 0 4095 Lots of memory seems to be in cache and free memory is less. Even when the website is not accessed that is leaving it very much idle for about 2days the free memory showed just 190. When the site is accessed the free memory seems to be go till 90mb then it increases to about 150mb. It always seems to remain just about 200mb. Is it somehow related to the server load showing 5.x. Will adding some more RAM resolve the load issue?

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• on debian, lighttpd apache2 using 80 port, lighttpd throws :address already use error

  - by user1960581

  I bought the linode(linode.com) server the other day. I've been trying to run lighttpd and apache2 at the same port, using lighttpd for static files. As linode is only providing ONE ipv4 address, I tried to bind lighttpd on the ipv6 address. That's where I got the same error each and very single time: can't bind to port [ipv6] 80 Address already in use. I tried bind the ipv4 address. Everything worked. Please help me, this is driving me nuts for the last two days. my lighttpd.conf file:(the ipv6 address isn't true) server.modules = ( "mod_access", "mod_alias", "mod_compress", "mod_redirect", # "mod_rewrite", ) server.document-root = "/var/www" server.upload-dirs = ( "/var/cache/lighttpd/uploads" ) server.errorlog = "/var/log/lighttpd/error.log" server.pid-file = "/var/run/lighttpd.pid" server.username = "www-data" server.groupname = "www-data" server.port = 80 server.bind = "2600:3c02::0000" server.use-ipv6 = "enable" #server.pid-file = "/var/run/lighttpd.pid" index-file.names = ( "index.php", "index.html", "index.lighttpd.html" ) url.access-deny = ( "~", ".inc" ) static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" ) compress.cache-dir = "/var/cache/lighttpd/compress/" compress.filetype = ( "application/javascript", "text/css", "text/html", "text/plain" ) # default listening port for IPv6 falls back to the IPv4 port #include_shell "/usr/share/lighttpd/use-ipv6.pl " + server.port include_shell "/usr/share/lighttpd/create-mime.assign.pl" include_shell "/usr/share/lighttpd/include-conf-enabled.pl" ### ipv6 ### $SERVER["socket"] == "[2600:3c02::0000]:80" { # accesslog.filename = "var/log/lighttpd/ipv6/access.log" # server.document-root = "/var/www/" # server.error-handler-404 = "/index.php?error=404" } and the error message: can't bind to port, 2600:3c02::0000 Address already in use.

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• Linux Kernel Packet Forwarding Performance

  - by Bob Somers

  I've been using a Linux box as a router for some time now. Nothing too fancy, just enabling forwarding in the kernel, turning on masquerading, and setting up iptables to poke a few holes in the firewall. Recently a friend of mine pointed out a performance problem. Single TCP connections seem to experience very poor performance. You have to open multiple parallel TCP connections to get decent speed. For example, I have a 10 Mbit internet connection. When I download a file from a known-fast source using something like the DownThemAll! extension for Firefox (which opens multiple parallel TCP connections) I can get it to max out my downstream bandwidth at around 1 MB/s. However, when I download the same file using the built-in download manager in Firefox (uses only a single TCP connection) it starts fast and the speed tanks until it tops out around 100 KB/s to 350 KB/s. I've checked the internal network and it doesn't seem to have any problems. Everything goes through a 100 Mbit switch. I've also run iperf both internally (from the router to my desktop) and externally (from my desktop to a Linux box I own out on the net) and haven't seen any problems. It tops out around 1 MB/s like it should. Speedtest.net also reports 10 Mbits speeds. The load on the Linux machine is around 0.00, 0.00, 0.00 all the time, and it's got plenty of free RAM. It's an older laptop with a Pentium M 1.6 GHz processor and 1 GB of RAM. The internal network is connected to the built in Intel NIC and the cable modem is connected to a Netgear FA511 32-bit PCMCIA network card. I think the problem is with the packet forwarding in the router, but I honestly am not sure where the problem could be. Is there anything that would substantially slow down a single TCP stream?

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• ESXi 4.0 Guests Locking up

  - by Brendan Sherwin

  I installed ESXi 4.0 on an HP Proliant g5 with a 64bit Xeon processor and took advantage of the free license as I work for a public school. I created two instances of server 2003 from scratch, one to be the DC, DHCP, the other to be a file server and DNS/DHCP backup. I had both guests up and running fine, setup my user accounts, transferred the data, etc etc. Once I joined a client machine to the domain, I would find that both of my Windows guests would lock up. Sometimes it would be for five or so minutes, once it was overnight. The "locked up" state means that as far I could tell, all services were stopped; dhcp no longer handed out IP's, DNS stopped working, I couldn't RDP into the server. The ESXi host, my HP server, was still running fine. VSphere was working, and I could look at the performance of the individual guests.I would try Powering off the hosts from inside VSPhere, and the hosts would start powering off, but get stuck at 95%, and stay that way, sometimes only for 10 minutes, others for hours. Several times I had to restart ESXi from it's console in order to restart my machines. Now, can anyone tell me what is happening, and how I can fix it, or take steps to prevent it? I hired a consultant to come take a look at it, someone who's experience and knowledge I trust, and he told me he had never seen anything like this ever before. He spoke to a friend of his who is VM certified, and he also said he had never heard of this issue. Thanks for your replies, and I'll do my best to respond ASAP. Currently, the server is powered off, and I've reinstituted my nine year old Server 2000 boxes, and I'm considering installing ESXi 3.5. Does anyone know a host created in 4.0 will work in 3.5? I'd really like to avoid having to rebuild those accounts! I know 4.0 works on this server, as I have another server in another school with the same exact hardware running 4.0 fine. Brendan

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• Linux error when resume from RAM

  - by TuxPotato

  The last two times that I have resumed my laptop from sleep, it has hung and given me this set of errors: [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 1sec aborting [drm:atom_execute_table_locked] *ERROR* atombios stuck executing E692 (len 460, WS 0, PS 4) @0xE6D3 hda_intel: azx_get_responce timeout, switching to single_cmd mode: last cmd=0x01170700 ata6: softreset failed (device not ready) ata4: softreset failed (device not ready) [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 1sec aborting [drm:atom_execute_table_locked] *ERROR* atombios stuck executing E692 (len 460, WS 0, PS 4) @0xE6D3 The last two messages repeat two more times. The first time this happened, Linux's Magic SysRq worked and did a soft reboot, and after that everything was fine till it went to sleep again. It wakes up and gives me this. Here are the laptop stats: Toshiba Satellite L455D-S5976 AMD Sempron SI-42 Processor 2GB DDR2 RAM HD TruBrite Display ATI Radeon Graphics (integrated) Running Ubuntu 10.10 32 bit I'm not sure about the hard drive, but its a 250GB drive with one NTFS partition, two Hidden NTFS, one Linux Swap, and one Ext4. Can someone tell me whats wrong with my laptop? NOTE: This only happens when I close the screen. My computer doesn't go to sleep with the screen open.

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• Computer specs for a large database

  - by SpeksETC

  What sort of computer specs (CPU, RAM, disk speed) should I use for running queries on a database of 200+ million records? The queries are for a research project, so there is only one "user" and only one query will be running at a time. I tried it on my own laptop with SQL Server with an i3 processor, 2GB RAM, 5400 RPM disk and a simple query didn't finish even after 8+ hours. I have an option to connect a SSD via eSata and upgrade to 4GB RAM, but not sure if this will be enough... Thanks! Edit: The database is about 25 GB and the indexes are not setup properly. When I tried to add an index, I let it run for about 8 hours and it still hadn't finished so I gave up. Should I have more patience :)? In general, the queries will run once in a while and its ok even if it takes a couple hours to complete.... Also, the queries will produce probably about 10 million records which I need to process using Stata/Matlab and I'm concerned that my current laptop is not strong enough, but unsure of the bottleneck....

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• What's hogging my CPU?

  - by endolith

  Ubuntu's System Monitor applet shows 100% CPU usage continuously. If I click it, the resources tab shows it at 100% continuously, too. If I go to processes, though, to find out which process is the culprit, there is nothing above 10%. If I run top there is nothing above 10%. I try killing lots of things, but it continues at 100%. How can I find out what's hogging the CPU? This is an unusual situation on a computer I use daily, that normally only hits 100% CPU when I'm doing something that requires it (like loading 32 Firefox tabs) after which it goes back to a normal idle level. It's not a new install or anything. It shouldn't be maxed out. I'm not sure when it started or if I changed something that caused it to happen. Normally I would use top or System Monitor and find the process that had gone out of control, but I can't find anything with those tools this time. It persists after reboots and everything. And the processor is obviously hot, so it's not an erroneous reading. Update: I tried killing any process I saw active again, and killing vino-server finally fixed the problem, even though it never went above 5%. I had enabled Remote Desktop a few days ago (and have obviously now disabled it). How did it manage to use 100% CPU while top only showed it as 5% or so? How do I identify the culprit in the future? Looks like I'm not the only one: Still a problem in both jaunty & karmic. Interestingly, both System Monitor & htop do not show the sum of individual processes being anywhere near 100% cpu.

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• Node.js, Nginx and Varnish with WebSockets

  - by Joe S

  I'm in the process of architecting the backend of a new Node.js web app that i'd like to be pretty scalable, but not overkill. In all of my previous Node.js deployments, I have used Nginx to serve static assets such as JS/CSS and reverse proxy to Node (As i've heard Nginx does a much better job of this / express is not really production ready). However, Nginx does not support WebSockets. I am making extensive use of Socket.IO for the first time and discovered many articles detailing this limitation. Most of them suggest using Varnish to direct the WebSockets traffic directly to node, bypassing Nginx. This is my current setup: Varnish : Port 80 - Routing HTTP requests to Nginx and WebSockets directly to node Nginx : Port 8080 - Serving Static Assets like CSS/JS Node.js Express: Port 3000 - Serving the App, over HTTP + WebSockets However, there is now the added complexity that Varnish doesn't support HTTPS, which requires Stunnel or some other solution, it's also not load balanced yet (Perhaps i will use HAProxy or something). The complexity is stacking up! I would like to keep things simpler than this if possible. Is it still necessary to reverse proxy Node.js using Nginx when Varnish is also present? As even if express is slow at serving static files, they should theoretically be cached by Varnish. Or are there better ways to implement this?

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• Cannot upload files bigger than 8GB to Amazon S3 by multi-part upload due to broken pipe

  - by spencerho

  I implemented S3 multi-part upload, both high level and low level version, based on the sample code from http://docs.amazonwebservices.com/AmazonS3/latest/dev/index.html?HLuploadFileJava.html and http://docs.amazonwebservices.com/AmazonS3/latest/dev/index.html?llJavaUploadFile.html When I uploaded files of size less than 4 GB, the upload processes completed without any problem. When I uploaded a file of size 13 GB, the code started to show IO exception, broken pipes. After retries, it still failed. Here is the way to repeat the scenario. Take 1.1.7.1 release, create a new bucket in US standard region create a large EC2 instance as the client to upload file create a file of 13GB in size on the EC2 instance. run the sample code on either one of the high-level or low-level API S3 documentation pages from the EC2 instance test either one of the three part size: default part size (5 MB) or set the part size to 100,000,000 or 200,000,000 bytes. So far the problem shows up consistently. I attached here a tcpdump file for you to compare. In there, the host on the S3 side kept resetting the socket.

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• Why do I get xfs_freeze "Operation not supported" error with ec2-consistent-snapshot? Debian Squeeze w/ext4 filesystem

  - by Michael Endsley

  I'm running the following command: [root@somehost ~]# ec2-consistent-snapshot --aws-credentials-file '/some/dir/file' --mysql --mysql-socket '/var/run/mysqld/mysql.sock' --mysql-username 'backup' --mysql-password 'password' --freeze-filesystem '/dev/xvda1' vol-xxxxxx It returns this error: xfs_freeze: cannot freeze filesystem at /dev/xvda1: Operation not supported ec2-consistent-snapshot: ERROR: xfs_freeze -f /dev/xvda1: failed(256) snap-eeb66393 xfs_freeze: cannot unfreeze filesystem mounted at /dev/xvda1: Invalid argument ec2-consistent-snapshot: ERROR: xfs_freeze -u /dev/xvda1: failed(256) This is being run on Debian Squeeze with the ext4 Linux filesystem. Can anyone explain this error to me, or what might be its cause? When googling, I found information about it needing to be executed with sudo, but I'm performing the entire operation as root. I also found some posts about trying to run it after a CentOS upgrade using yum, but the situation appeared dissimilar. It's difficult to find things referring to this situation exactly. xfs_freeze is available for use on the filesystem. Is it possible that the filesystem, despite being ext4, somehow doesn't support freezing? Sorry if I've missed some bit of StackExchange etiquette with this post -- it's my first venture here!

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• Installing SATA dvd burner on machine with no spare SATA ports/connectors

  - by Faheem Mitha

  Greetings. I have the following motherboard Tyan Thunder K8WE S2895A2NRF Motherboard - extended ATX - nForce Pro 2200/2050 - Socket 940 - UDMA133, Serial ATA-300 (RAID) - 2 x Gigabit Ethernet - FireWire - 6-1 channel audio This is part of a computer that was assembled in the winter of 2006/2007. The user manual says the following with regard to SATA Integrated SATAII Generation 1 Controllers (from NForce Professional 2200) Two integrated dual port SATA II controllers Four SATA connectors support up to four drives 3 Gb/s per direction per channel NvRAID v2.0 support Supports RAID 0, 1, 0+1 and JBOD. I just purchased a SATA DVD burner. Here is the page for the product http://www.amazon.ca/gp/product/B002QGDWLK/ The problem I am facing is that I already have 4 SATA drives installed. I don't want to remove any of them. However, I want the DVD burner above installed as well. The person I am consulting with here (Bombay, India) tells me that my four available SATA ports are filled, and that my only option is to install a SATA card into the one free PCI slot on the motherboard. However, he says that with this setup I will not be able to boot from the DVD drive. Are these statements correct, and what are my other options if any? Even it the statements in the last para are true, I suppose I could use one of the motherboard connectors/ports there are currently being used with the hard drives with the DVD drive, and use the "add-on" connector with one of the hard drives. Not all the 4 hard drives need to be bootable. BTW, despite having read through http://en.wikipedia.org/wiki/Serial_ATA#Cables.2C_connectors.2C_and_ports I am fuzzy on the differences between connectors, cables and ports. Thanks in advance.

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• Cant connect to MySQL server from Java application

  - by RN

  This is on VPS\Centos server. The MySQL server is pre configured. I am running the Java application on Tomcat My Java web application is not able to connect to the MySQL server. I get an error - "Caused by: java.net.ConnectException: Connection refused" I suspect this to be a configuration problem rather than a coding problem- hence I have posted this on ServerFault And yes, The same web-app is able to connect to MySQL on a different linux box This is the URL that I provided to my Java application (note- it assumes default port) url = "jdbc:mysql://localhost/pickupgames" My first suspicion was that I am running on a non-default port So I tried to find the port where mySQL server is running I tried every trick mentioned in http://serverfault.com/questions/116100/how-to-check-what-port-mysql-is-running-on But no luck ! SHOW GLOBAL VARIABLES LIKE 'PORT'; This shows port 0 netstat -tlnp doesn't show mysql at all /etc/my.cnf It has no port entry telnet localhost 3306 Doesn't connect And in case you are wondering if mysql server is running at all or not It is And I know for sure, because I have been able to login using the mysql command Also # ps -ef|grep 'mysql' root 31839 27662 0 00:49 pts/3 00:00:00 grep mysql root 32452 1 0 Apr02 ? 00:00:00 /bin/sh /usr/bin/mysqld_safe --skip-grant-tables --skip-networking mysql 32504 32452 0 Apr02 ? 00:00:06 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --skip-external-locking --socket=/var/lib/mysql/mysql.sock --skip-grant-tables --skip-networking Please note the --skip-networking parameter Does this have something to do with the issue ? Any explanation why I cant connect to mysql server on port 3306 by telnet? Or why it docent show up under netstat? Any suggestion on whet I should try next ?

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• Ubuntu 12.4 compiz - disable all compiz plugin - empty screen

  - by gotqn

  A friend of mine has installed on my new machine Ubuntu 10.4 (I have always been windows user and have no experience with Linux). I started to watch some tutorial about how to make 'Rotated Cube' using 'Compiz',but the cube appears in the form of a list (only two slides). I have thought this could be result of my video cards (only two - one from the processor and one from the motherboard) and they can not support this options. Anyway, I have decided to disable all compiz plugins and options because my friend has set some, and I started to think there is some misunderstanding between the plugins. After, that I got only empty screen(no menu, no icons, anything) and can do nothing. How to fix this? EDIT: When I remove the compiz stuffs (from the console), the menu is shown again. Then I install the compiz again (some of the effect are still not working). After restart or log out/in the menu is hidden again. I suppose that there are some settings that I've broken but they are saved somewhere in the system and remove the compiz do not deleted them and as a result they are activated after compiz is installed again and the PC is restarted?

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• MySQL binlogs seems incomplete?

  - by warl0ck

  I created a Database, a table and inserted some data, and found this binlog.0000001 in my log folder, but when I do mysqlbinlog binlog.0000001, it only shows stuff below, seems incomplete: (There's only two files in the log dir: binlog.000001 binlog.index) /*!40019 SET @@session.max_insert_delayed_threads=0*/; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; # at 4 #120924 21:12:56 server id 1 end_log_pos 107 Start: binlog v 4, server v 5.5.24-0ubuntu0.12.04.1-log created 120924 21:12:56 at startup # Warning: this binlog is either in use or was not closed properly. ROLLBACK/*!*/; BINLOG ' GAVhUA8BAAAAZwAAAGsAAAABAAQANS41LjI0LTB1YnVudHUwLjEyLjA0LjEtbG9nAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAYBWFQEzgNAAgAEgAEBAQEEgAAVAAEGggAAAAICAgCAA== '/*!*/; DELIMITER ; # End of log file ROLLBACK /* added by mysqlbinlog */; /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; If this warning was the cause: Warning: this binlog is either in use or was not closed properly.. How do I force close the log? EDIT After flush logs command, I see "0 rows" affected, and a few new files, binlog.000001 binlog.000002 binlog.000003 binlog.000004 binlog.index, the contents are nearly the same as binlog.000001. Now I dropped the database, and try restore it with mysqlbinlog binlog.0* | mysql -u root -p, but the database wasn't recovered. EDIT 2 [mysqld] user = mysql pid-file = /var/run/mysqld/mysqld.pid socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp lc-messages-dir = /usr/share/mysql skip-external-locking log-bin=/var/log/mysql/binlog binlog-do-db=mydb bind-address = 127.0.0.1 key_buffer = 16M max_allowed_packet = 16M thread_stack = 192K thread_cache_size = 8 myisam-recover = BACKUP query_cache_limit = 1M query_cache_size = 16M expire_logs_days = 10 max_binlog_size = 100M P.S /var/log/mysql{.err,.log} are both empty

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• Choosing the right TV tuner - USB or PCI TV tuners, hardware/software, DVB? Hybrid/combo/analog?

  - by Nucleon

  Greetings, I'll start with some background information so you know what I'm trying to accomplish and then get to my question. I work at a Television station in the US and we are working on setting up an online DVR/Podcast system for all of our newscasts. So basically we would be recording every newscast in HD, encoding it to flv/h.264 for viewing in a browser on flash compatible and iphone/ipad devices, eventually migrating to WebM when it's browser compliant. This task is theoretically pretty simple as it all it involves is a TV tuner device and a program like VLC, MythTV or whatever to schedule and dump it to a file, encode it with VLC/FFMPEG and push it to the streaming server. Now to the hardware, in order to accomplish that task, should I use an internal PCI tuner or a USB 2.0 tuner? Is there a difference? The bus speeds of both are not too far apart, and is the bus speed really relevant in this case? Does it matter if the device has a hardware encoder or a software encoder? On many sites the USB was recommended for ease of set up and use, but would it overly task a processor, or is that not a concern as long as it's a decent PC (at least duo core, 6gb ram). What's the difference between the stick USB and the Box USBs? To my understanding analog is basically gone in the US, so we would want a hybrid or combo tuner correct? How do those differ from DVB? Are there any other features or concepts which I am missing which may influence the recommended product. It would be ideal if the device which could work in both Linux and a Windows environment, to my knowledge most Hauppauge are? Example 1: PCI Hauppage http://www.newegg.com/Product/Product.aspx?Item=N82E16815116033 Example 2: USB 2.0 Box http://www.newegg.com/Product/Product.aspx?Item=N82E16815116029 Example 3: USB 2.0 Stick http://www.newegg.com/Product/Product.aspx?Item=N82E16815116031 Any guidance from the Superusers would be much appreciated!

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• Can't Connect To Local Mysql Using IP Address, but CAN connect from remote server

  - by user1782041

  Here's an interesting one that does not seem to fall into any of the mysql connection issues I've read about or searched for: On an Ubuntu 12.04 box I had some system updates waiting to install, and I took care of that this evening. After the install, I started seeing some errors in my syslog complaining about a particular php script that could no longer connect to the mysql instance on the box. Here is the specific error: PHP Warning: mysql_connect(): Can't connect to MySQL server on '192.168.0.40' (4) Now, the server's IP address is 192.168.0.40, and I've checked to make sure that I have mysql listening on 0.0.0.0 so that I can connect using either "localhost" or "192.168.0.40". Here's where things get odd: From the local machine, if I try the following: mysql -uroot -p -h192.168.0.40 I get this error: ERROR 2003 (HY000): Can't connect to MySQL server on '192.168.0.40' (110) I've checked, and error 110 indicates an OS timeout, and error 2003 is the mysql generic "can't connect" error. This indicates that it is not permissions with the user. However, if I do the same thing from a remote machine (say, from 192.168.0.30), I log right in with no problems. Futher, other scripts on the local machine that connect to mysql using "localhost" for the host rather than "192.168.0.40" connect with no problems. Also, I can connect via the mysql socket with no problems both from the command line and php scripts. So, this feels like a networking issue of some kind on the local box, but there are no iptables rules on this box (it is firewalled externally) and I can't figure out what else may be causing this. This problematic script worked perfectly prior to the latest system update. For now, I'll simply change the script to connect via localhost, but I'd really like to know why it broke for 2 reasons: There may be other scripts that connect using 192.168.0.40 that don't run very often which are now broken. Auditing them all will take more time than I feel like devoting at the moment. I'm curious, and want to know why it broke so I can fix it correctly. Any help?

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