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• unable to set xmx beyond 4gb on system having 8gb RAM

  - by Arun

  I need to set ANT_OPTS=-Xms1024m -Xmx6144m -XX:PermSize=1024m -XX:MaxPermSize=1024m JAVA_OPTS=-Xms1024m -Xmx6144m -XX:PermSize=1024m -XX:MaxPermSize=1024m I have a system with 8gb(recently upgraded from 4 gb) But once i set the ant opts to above said value I am not able to run any of my ant targets and I get the following error [ERROR] Argument error: -Xmx6144m [ERROR] Specified maximum heap size (6144 MB) is larger than the address space on this platform (4 GB). [WARN ] -XX:PermSize=1024m is not a valid VM option. Ignoring [WARN ] -XX:MaxPermSize=1024m is not a valid VM option. Ignoring Could not create the Java virtual machine. This indicates the Java that I have on my system java version "1.6.0_20" Java(TM) SE Runtime Environment (build 1.6.0_20-b02) Oracle JRockit(R) (build R28.1.0-123-138454-1.6.0_20-20101014-1351-windows-x86_64, compiled mode) and I am running a Windows 7 on Intel Core 2 duo 3Ghz processor and 8gb RAM Any pointers in solving this issue would be of great help. PS: I did google for the error and it was one of my 1st such occurence where I didnot get any links pointing to the specific solution. Maybe no one has encountered such a scenario

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• Ubuntu odd mouse and keyboard behavior when window gains inner focus

  - by Scott

  This morning on my Ubuntu 10.10 system when I open a window - for example, system-preferences-about me, if I click in to a field such as "work email", I can no longer close the window with the mouse! Clicking the X on the window will not work. Also, I loose the ability to click on anything else - clicking on the desktop, icons, menus, workspaces, etc. do not work. Even the effect when you hover over a folder on the desktop and that folder highlights - that stops until the window is closed. If I open this same screen but do not click in to a field, everything is fine - I can close the window with the X and everything else works fine. Same thing happens with several other windows I tried. Even calculator - I can open it, everything is fine until I click on a button in the calculator - then no ability to click on anything else. Have to Alt-F4 to close the window. The system is only about a week old from a fresh install (64 bit ubuntu - quad core amd machine). I uninstalled wine, turned off remote desktop/disabled in startup, also in startup disabled visual assistance, bluetooth, dropbox, klipper. Reboot, no difference. The only other thing non-standard I see in startup is nvidia. Using a logitec usb mouse, saitek usb keyboard. Was working fine yesterday. I can not think of anything I did / installed yesterday. I switched themse, then went to update manager and saw two x server / x org related updates and installed them, reboot and NOW IT IS FINE! However, then I re-enabled dropbox, klipper and remote desktop rebooted and the problem is back. Again I disabled and rebooted. Problem is still there!! So somehow I fixed it at least for a few minutes, but now it is back and I am out of ideas.

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• Reset rc.d so software starts at boot again

  - by natli

  I ran the following 2 commands on my VPS box and now it boots without starting any software at all. According to rcconf it's still supposed to start my chosen software (ssh etc.) but it doesn't. update-rc.d vz defaults update-rc.d vzeventd defaults I already tried removing them again with update-rc.d -f vz remove update-rc.d -f vzeventd remove But that didnt't change anything. /etc/rc.local also still correctly lists some scripts I want to run at start-up, but they don't seem to be called either. I expect the top 2 commands to be responsible, but here's everything I did: mkdir /var/openvz-dl cd /var/openvz-dl wget http://download.openvz.org/kernel/branches/rhel6-2.6.32/042stab062.2/vzkernel-2.6.32-042stab062.2.x86_64.rpm wget http://download.openvz.org/kernel/branches/rhel6-2.6.32/042stab062.2/vzkernel-devel-2.6.32-042stab062.2.x86_64.rpm wget http://download.openvz.org/utils/vzctl/4.0/vzctl-4.0-1.x86_64.rpm wget http://download.openvz.org/utils/vzctl/4.0/vzctl-core-4.0-1.x86_64.rpm wget http://download.openvz.org/utils/ploop/1.5/ploop-1.5-1.x86_64.rpm wget http://download.openvz.org/utils/ploop/1.5/ploop-lib-1.5-1.x86_64.rpm wget http://download.openvz.org/utils/vzquota/3.1/vzquota-3.1-1.x86_64.rpm apt-get install fakeroot alien fakeroot alien --to-deb --scripts --keep-version vz*.rpm ploop*.rpm dpkg -i vz*.deb ploop*.deb --force-overwrite update-rc.d vz defaults update-rc.d vzeventd defaults reboot A huge part of that failed because I was running it on an OpenVZ VPS which has a shared kernel that can't be altered, so I also had to fix the dpkg like so (it was moaning about wanting to install vzkernel with a package not being found); rm /var/lib/dpkg/info/vzkernel* dpkg-reconfigure vzkernel --force dpkg --purge --force-all vzkernel But that didn't fix the boot issue either. How do I make my software start at boot again?

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• Optimizing Apache for large file serving

  - by D_Guy13

  I have a random problem with Apache that I can't quite figure out, here is my setup, Windows Server 2008 R2, 64 Bit, 5GB RAM, SSD with 200 MB(Read/write) and Dual Core CPU @ 2.1 GHz A dump from mod-staus, Server Version: Apache/2.4.7 (Win32) mod_limitipconn/0.24 mod_antiloris/0.5.2 PHP/5.5.9 Server MPM: WinNT Apache Lounge VC11 Server Built: Nov 21 2013 20:13:01 Current Time: Thursday, 21-Aug-2014 23:38:06 W. Europe Daylight Time Restart Time: Thursday, 21-Aug-2014 20:30:47 W. Europe Daylight Time Parent Server Config. Generation: 1 Parent Server MPM Generation: 1 Server uptime: 3 hours 7 minutes 18 seconds Server load: -1.00 -1.00 -1.00 Total accesses: 283025 - Total Traffic: 1172.2 GB 25.2 requests/sec - 106.8 MB/second - 4.2 MB/request 62 requests currently being processed, 388 idle workers Serving large .zip & iso files using mod_xsendfile. (File size range 500 MB - 1.5 GB) The setup works and is running fine. CPU usage is very unstable, jumps all the time between 10% - 90% and the servers goes down when it hits 100%. In that case I have to hard restart the server. Server it outputting traffic at 30 Mbps. Is there anything else I should think about to get a more stable CPU usage? Is that CPU usage normal? Can switching to Linux help me achieve better CPU usage?

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• RHEL 5.3 Kickstart - How specify location of individual package in Workstation folder?

  - by Ed

  I keep getting "package does not exist" errors during the install. I made a kickstart ISO to create an unattended install of a RHEL 5.3 build machine for C++ software releases. It pulls the kickstart config file from our internal web server. This is handy; it makes it easy to test and modify without having to make a new ISO. And I plan to check it in to version control if I can get it working. Anyway, the rpm packages are located in two folders on the disk; Client and Workstation. The packages install fine for the ones that are physically located under the Client folder. It cannot find those under the Workstation folder such as as doxygen and subversion complaining that packages do not exist. Is there a way to specify the individual package location? # ----------------------------------------------------------------------------- # P A C K A G E S # ----------------------------------------------------------------------------- %packages @gnome-desktop @core @base @base-x @printing @development-tools emacs kexec-tools fipscheck xorg-x11-server-Xnest xorg-x11-server-Xvfb #Packages Located in Workstation Folder *** Install can not find any of these ?? bison doxygen gcc-c++ subversion zlib-devel freetype-devel libxml2-devel Thanks in advance, -Ed

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• Mysqld shutting down by itself

  - by AJ Naidas

  I'm running a Wordpress Blog that gets medium-high traffic. It is hosted in an Ubuntu Server 2GB Memory 2 Core Processor 40GB SSD Disk, 3TB Transfer. The problem is that MySQL shuts down by itself after an hour or two. I had to restart mysql each and every time this happens. I checked the logs and this is what I found: 140612 6:48:14 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use the full name instead. 140612 6:48:14 [Note] Plugin 'FEDERATED' is disabled. 140612 6:48:14 InnoDB: The InnoDB memory heap is disabled 140612 6:48:14 InnoDB: Mutexes and rw_locks use GCC atomic builtins 140612 6:48:14 InnoDB: Compressed tables use zlib 1.2.3.4 140612 6:48:14 InnoDB: Initializing buffer pool, size = 1.4G InnoDB: mmap(1502412800 bytes) failed; errno 12 140612 6:48:14 InnoDB: Completed initialization of buffer pool 140612 6:48:14 InnoDB: Fatal error: cannot allocate memory for the buffer pool 140612 6:48:14 [ERROR] Plugin 'InnoDB' init function returned error. 140612 6:48:14 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 140612 6:48:14 [ERROR] Unknown/unsupported storage engine: InnoDB 140612 6:48:14 [ERROR] Aborting 140612 6:48:14 [Note] /usr/sbin/mysqld: Shutdown complete judging by this line: 140612 6:48:14 InnoDB: Fatal error: cannot allocate memory for the buffer pool I suspect that this is a memory problem, but I would like to hear from the experts here before I conclude. Is this a lack of memory problem? Do you think the value of max_connections in my.cnf (currently 100) is a potential cause and needs increasing? TIA.

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• Decrease in disk performance after partitioning and encryption, is this much of a drop normal?

  - by Biohazard

  I have a server that I only have remote access to. Earlier in the week I repartitioned the 2 disk raid as follows: Filesystem Size Used Avail Use% Mounted on /dev/mapper/sda1_crypt 363G 1.8G 343G 1% / tmpfs 2.0G 0 2.0G 0% /lib/init/rw udev 2.0G 140K 2.0G 1% /dev tmpfs 2.0G 0 2.0G 0% /dev/shm /dev/sda5 461M 26M 412M 6% /boot /dev/sda7 179G 8.6G 162G 6% /data The raid consists of 2 x 300gb SAS 15k disks. Prior to the changes I made, it was being used as a single unencrypted root parition and hdparm -t /dev/sda was giving readings around 240mb/s, which I still get if I do it now: /dev/sda: Timing buffered disk reads: 730 MB in 3.00 seconds = 243.06 MB/sec Since the repartition and encryption, I get the following on the separate partitions: Unencrypted /dev/sda7: /dev/sda7: Timing buffered disk reads: 540 MB in 3.00 seconds = 179.78 MB/sec Unencrypted /dev/sda5: /dev/sda5: Timing buffered disk reads: 476 MB in 2.55 seconds = 186.86 MB/sec Encrypted /dev/mapper/sda1_crypt: /dev/mapper/sda1_crypt: Timing buffered disk reads: 150 MB in 3.03 seconds = 49.54 MB/sec I expected a drop in performance on the encrypted partition, but not that much, but I didn't expect I would get a drop in performance on the other partitions at all. The other hardware in the server is: 2 x Quad Core Intel(R) Xeon(R) CPU E5405 @ 2.00GHz and 4gb RAM $ cat /proc/scsi/scsi Attached devices: Host: scsi0 Channel: 00 Id: 32 Lun: 00 Vendor: DP Model: BACKPLANE Rev: 1.05 Type: Enclosure ANSI SCSI revision: 05 Host: scsi0 Channel: 02 Id: 00 Lun: 00 Vendor: DELL Model: PERC 6/i Rev: 1.11 Type: Direct-Access ANSI SCSI revision: 05 Host: scsi1 Channel: 00 Id: 00 Lun: 00 Vendor: HL-DT-ST Model: CD-ROM GCR-8240N Rev: 1.10 Type: CD-ROM ANSI SCSI revision: 05 I'm guessing this means the server has a PERC 6/i RAID controller? The encryption was done with default settings during debian 6 installation. I can't recall the exact specifics and am not sure how I go about finding them? Thanks

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• How to diagnose issue between mobo, RAID, and SSD cache drive? [migrated]

  - by goober

  Background This issue is happening on my custom-built desktop. Relevant specs: Motherboard: ASUS P8Z68-V PRO Utilizing Intel RST technology (application that uses unused SSD as cache) Processor: Intel core i7-2600k (not overclocked) HDDs: RAID1 of 2x Seagate Barracuda 1TB (ST31000524AS) (RAID performed via z68 chipset) Machine has run fine for ~1 year with no issues, and has been well-maintained (dust, etc.) What Happened Random Freezing issues -- intermittent Looked at the RST application screen to see that the acceleration cache was listed as "unavailable" -- recommended that I power down and reconnect the drive. Reconnected the drive to no avail. Attempted to move the drive to another SATA port. Acceleration option disappeared from RST software. Now, the freeze happens whenever loading something particularly data-driven (a video, a game, etc.) Steps Attempted Reconnected the drive to no avail. Updated Intel RST software to v. 11.6.0.1030 to see if that made a difference. Attempted to move the drive to another SATA port. Acceleration option disappeared from RST software. Connected the drive as its own volume. Formatted it, ran disk check errors -- all seems fine. Reconnected the drive and selected it again as the cache drive. Now, what happens when there is a freeze: Machine freezes I am unable to perform any command Screen then goes black I hit the reset button During boot, all drives show as "Disabled" and I am told no volume can be found I then hit the reset button (or power off/on) again. Either the next time (or sometimes after repeating this once more), the metadata cache is reconstructed and the system boots fine, showing the SSD as a cache. Question I believe this is an issue with the SSD itself, but how can I be sure since connecting it separately appeared to show no problems? I want to make sure it's not an issue with the motherboard, SATA ports, etc.

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• MongoDB and GrifFS. What are the best storage options in the range of 1 TB?

  - by Nerian

  We are going to launch a service that will require between 1 and 2 GB for file storage per paid user. I am going to use GridFS for storing files. I am pondering the different options for storing the database. But since I am unexperienced at deployment and it is my first time with Mongodb I need your experience. Criteria: I want to spend my time developing my core business, that is, my own application. I am a Ruby on Rails developer. I do not like to mess with server configuration. Hence, I would like a fully managed hosting solution. But I would like to know about any other option, if you think it is worth it. It should be able to scale. Cloud style. Pay as you go. The lower the price, the better. So far I known of these services: https://mongohq.com/pricing https://mongomachine.com/pricing https://mongolab.com/about/pricing/ http://cloudcontrol.com/add-ons/mongodb/ And they seem to be OK for common needs, that is no file storage. But I am going to use GridFS, so the size matters. These services seems to scale, in price, quite poorly. MongoHQ: The larger plan max storage is 20 GB. Seems like a very little storage, for GridFS. MongoMachine: Flat price, 2.5$ per GB. I didn't found the limit. Seems like a good price, comparing the others. MongoLab: 3.984 GB max, which I don't think I will hit, so perfect. 8$ per GB, quite costly. CloudControl: The larger plan is 20 Gb. The custom service starts at 250€ plus some unspecified charge per GB. What is your experience with these services? Any downtimes? Other possibilities?

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• Error authenticating git repository with Redmine

  - by woni

  I've setup Redmine 2.1 on my Debian Squeeze server following this Tutorial HowTo configure Redmine for advanced git integration (I tried to use the grack path). Redmine server is running properly, but I have a problem granting users access to git repositories. When I try to clone a repository it says: error: The requested URL returned error: 500 while accessing The apache error.log shows this entry: [Fri Sep 28 15:50:56 2012] [crit] [client xx.xx.xx.xx] configuration error: couldn't check user. Check your authn provider!: /repo.git/info/refs It also asks me for user and password when cloning, but it shouldn't if I understand the tutorial right. I'm using the Redmine authentication module: <VirtualHost *:80> ServerName my.server.at DocumentRoot "/var/www/my.server.at/public" PerlLoadModule Apache::Redmine <Directory "/var/www/my.server.at/public"> Options None AllowOverride None Order allow,deny Allow from all </Directory> SetEnv REMOTE_USER=$REDIRECT_REMOTE_USER" SetEnv GIT_PROJECT_ROOT /var/git/my.server.at/ SetEnv GIT_HTTP_EXPORT_ALL ScriptAlias /git/ /usr/lib/git-core/git-http-backend <Location /> Order allow,deny Allow from all AuthType Basic AuthName Git Require valid-user AuthBasicAuthoritative Off AuthUserFile /dev/null AuthGroupFile /dev/null PerlAccessHandler Apache::Authn::Redmine::access_handler PerlAuthenHandler Apache::Authn::Redmine::authen_handler RedmineDSN "DBI:mysql:database=redmine;host=localhost" RedmineDbUser "user" RedmineDbPass "password" RedmineGitSmartHttp yes </Location> </VirtualHost> Can someone help me please and explain the error and what I can do to solve my problem?

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• What hardware would I need (approx) to run ESXi server?

  - by mr.b

  Hi, I am considering to purchase off-the-shelf commodity hardware in order to build server that will host virtual machines using ESXi server. Intended purpose for this server is NOT mission critical tasks. It will have to run perhaps 20-50 Windows XP/Vista/7 virtual machines (in total, but closer to 20 figure). Each guest would have to have 1-2 GB of ram, and probably two-three times more disk space than guest OS needs with clean install and all updates applied (that would be around 6-8 GB for XP, and i believe closer to 10-15 for win7). Those guests will act as a test ground for a new product that is network management software, thus guests will idle most of their time once initially loaded, but if I give them some task to complete, they should be able to perform reasonably well. Now, from what I have learned... CPU is usually not much of an issue (6 cores would do it), memory should not be lacking, but doesn't have to be sum of all guests, because of overcommitment... That leads me to IO, which is, as it seems, the bottleneck. Since I have very little experience with ESXi (and ESX, too) server, I'd like to ask: How much memory could I save by overcommitment, and how does it affect performance? Is 6-core cpu enough to run above described system? Would it be possible to run entire server off two (or even one) SSD drives (to host system virtual disks, with few additional HDDs (2-3) in RAID 0 to be used as secondary storage? I read somewhere that ESXi allows having something like "master image", essentially virtual machine that is "deployed" many times, so that disk space can be saved by having only differences stored by specific guests, instead of copying around whole virtual disks. Is this true, and how can this help me? Are there any other things I need to take into consideration when building this off-the-shelf solution? I should probably mention here that I'm fully aware of issues like SPOF regarding power supply, raid 0, etc, but since it's only a testing ground and not a production system, it's not so important for me. Thanks, B.

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• Getting a "CPU over temperature error", but temperatures seem to be normal

  - by Luis Parker

  I built a PC with the following parts: CPU: i5-2500 Motherboard: Asus P8H67-M EVO rev 3.0 RAM: G-Skill Ripjaws Series 8GB (2 x 4GB) DDR3 1333 Video: GTX 560-Ti 1GB I used a crappy (but functioning) old case and a 500W Powercooler supply. The rig also includes 3 HDs and a DVD-RW. Whenever I push the system mildly it resets right away (looks more like power off/power on) and gives me a "CPU over temperature error". However, BIOS always reports <65ºC for the CPU at the moment of the reset, same as Core Temp and RealTemp. This is RealTemp's log since launching BF3 until the reset (just over 1 minute, as you can see) Just to be sure I've checked the CPU cooler and re-applied the thermal paste twice, but nothing changed. I'm not overclocking at all. What am I missing here? Could it be that the old power supply is generating this error? Maybe the mobo isn't reporting temperatures correctly? I don't have a clue on how to troubleshoot this, help Thanks in advance!

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• Low-traffic WordPress website on Apache keeps crashing server

  - by OC2PS

  I have recently moved my low-moderate traffic (1000 UAUs, 5000 pageviews on a busy day) website from shared hosting to a Centos 6 64-bit VPS with Apache and cPanel running on 4 quad-core processor (likely oversold) and 3GB memory (Xen). We've had problems from the beginning. The server keeps crashing. It seems PHP keeps expanding till it consumes all the memory and crashes the server. Some folks have suggested that I should abandon Apache/cPanel/PHP/mySQL and go with nginX/Varnish/PHP-FPM/SQLite. But that's just not possible for me as I am not very tech savvy and need a simple GUI like cPanel to be able to manage the mundane management tasks (can't afford to hire system administrator or get fully managed hosting). I have come across several posts discussing optimization of Apache for WordPress. But all of these lead to articles that are pretty dated such as this ~4 year old one from Jan 2009 - http://thethemefoundry.com/blog/optimize-apache-wordpress/ The article is pretty detailed and seems helpful, but I stumble even on the first step. My httpd.conf only has 2 loadmodule commands LoadModule fastinclude_module modules/mod_fastinclude.so LoadModule bwlimited_module modules/mod_bwlimited.so So I go total bust right there. Further, my httpd.conf says Direct modifications to the Apache configuration file may be lost upon subsequent regeneration of the configuration file. To have modifications retained, all modifications must be checked into the configuration system by running: /usr/local/cpanel/bin/apache_conf_distiller I am having trouble finding where to change the modules in WHM. Please can someone help me with updated guidelines on how to optimize Apache for WordPress? Many thanks! P.S. The WordPress installation also has WP Super Cache installed. P.P.S. I also have phpBB, OpenCart, and Menalto Gallery installed.

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• 2012 R2 services will not start after promotion to Domain Controller

  - by Cybersylum

  Having a peculiar issue promoting a Windows 2012 R2 server in a domain at 2003 domain/forest functional level. Built a new 2012 R2 server, added the following software (labtech, appassure, eset A/V, & Teamviewer). It activated and appeared to be working fine. I added the Active Directory Domain Services role, and completed the configuration (Domain/Forest Prep, and DC promotion). All appeared to go well. I rebooted the server, and that's where the peculiar stuff began. I noticed the server indicated it needed activated again; but would not accept the key. I verified the key was good. That's when I noticed the Software Protection service (as well as many other core services - Base Filtering engine, DHCP client, firewall, etc) would not start. The error message for all of them was "Access Denied". I called MS, and they wanted to troubleshoot at a service level. Their fix was to use procmon and identify the resource that needed permissions (registry key, file or folder) and add "everyone" with full control). That got the services to start; but the problem re-appeared after a reboot. Thinking the issue might have been with the anti-virus package during the promotion process, I rebuilt the DCs from scratch and removed the metadata from AD (as I could not demote the machines "rpc server unavailble"). I tried to promote the newly built machines again. The only changes to the brand new machines being critical updates. Again the promotion appeared to work fine; but upon reboot (and a long wait to allow replication to occur) similar problems began to re-appear. I have verified that the schema updates are correct (schema version is 69 - for Windows 2012 R2). I am not finding much about this issue through my own searches, so I thought I would post this to see if anyone else has seen anything similar...

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• Error at the end of APC install

  - by cinqoTimo

  I need to get APC running for a Drupal install of mine. I found a fairly concise guide at http://blog.4rev.net/2009-09/installing-apc-accelerator-into-php5-fedora-core-11/ for installing on FC11, only, I am using FC12. I figured I would give it a shot. I was able to run the following commands successfully - and yum installed fc12 versions of everything in the FC11 guide. yum install php-pear yum install php-devel httpd-devel yum groupinstall ‘Development Tools’ yum groupinstall ‘Development Libraries’ Then, I tried pecl install apc. Everything looked good until to got to the end, where it outputted the following error. /var/tmp/APC/php_apc.c: In function ‘zif_apc_compile_file’: /var/tmp/APC/php_apc.c:881: warning: unused variable ‘eg_class_table’ /var/tmp/APC/php_apc.c:881: warning: unused variable ‘eg_function_table’ /var/tmp/APC/php_apc.c: At top level: /var/tmp/APC/php_apc.c:959: error: duplicate ‘static’ make: *** [php_apc.lo] Error 1 ERROR: `make' failed Some people have had success with installing apc-beta, but that didn't work for me.. Any suggestions? Is there something I missed that is critical in the FC12 version?

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• Slow, choppy video playback with nVidia 8600GT

  - by user5351

  I have an nVidia 8600GT card (made by EVGA) on a machine with Windows Vista (AMD Athlon X2 processors) and four gigs of ram. It runs pretty good, but I have had some slow/choppy/stuterring video playback issues whenever watching flash videos on Youtube or other sites. The problem is there with both Firefox and IE flash videos, but is maybe worse with Firefox. I also tried Linux with nVidia's binary drivers and it was about the same. I downloaded EVGA precision which allows me to control stuff like the fan and clock speed. The card's temp (in both Vista and Linux) is usually at 66C when idle (not playing a game or watching anything). It goes up a little when watching a video (maybe 68-72C). Any ideas on how to fix this? UPDATE: The issues are both with full screen and embedded flash videos. I have Flash 10.0.32.18 (always make sure I use most recent for security), and the CPU is an AMD Athlon 64 X2 Dual Core Processor 4000+ at 2.11 GHZ. The current GPU driver installed is the most recent GeForce one from last July.

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• (Win7) Gets stuck with ~1% CPU. Especially with multithreading

  - by meow

  Windows 7 32 bit, up to date, Intel i7 860. (For some reason the company runs 32bit Windows everywhere.) I tried to update all motherboard drivers etc. as far as possible. I have a performance issue with a machine which appears in connection with multithreading (or so I think). As an example (and where I most often see it, but it appears on other programs as well): ProteoWizard is a file conversion tool for mass spectrometry files. I can add a list of files and it will attempt to process up to 8 files in parallel (quadcore x 2 threads/core). If I choose 1 to 6 files, I start the process and it goes straight through. If I have =7 files in the queue, conversion goes to ~20%, then gets stuck for 15 seconds, then continues again, always in "chunks" of a few % before getting stuck again. During the time the process is stuck, CPU is at 1%. RAM is not limiting, it is maybe at 70% or so and not going up. I don't get the same problem on other, even slower machines. The computer gets also stuck at 1% CPU doing nothing on other occasions, but for multithreading it is most frequent. Where should I look for the problem?

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• Eclipse Indigo freezes on 'Open Type' search

  - by NickGreen

  When I'm trying to search for a Java class with Ctrl-shift-T (Open Type popup), Eclipse freezes when I'm typing 1 character. It usually takes about 8 seconds to 'unfreeze', but sometimes it won't come back at all.. When it freezes, I see that the eclipse process takes about 1Gig of mem and the CPU is about 100%! I've tried creating a new workspace, adjusting the eclipse.ini (perm size, different memory values), starting with -clean and at last reinstall the whole IDE. Nothing helps.. My eclipse.ini: -startup plugins/org.eclipse.equinox.launcher_1.2.0.v20110502.jar --launcher.library plugins/org.eclipse.equinox.launcher.gtk.linux.x86_64_1.1.100.v20110505 -product org.eclipse.epp.package.jee.product --launcher.defaultAction openFile -showsplash org.eclipse.platform --launcher.XXMaxPermSize 768m --launcher.defaultAction openFile -vmargs -server -Dosgi.requiredJavaVersion=1.5 -Xmn128m -Xms1024m -Xmx1024m -Xss2m -XX:PermSize=128m -XX:MaxPermSize=128m -XX:+UseParallelGC -Djava.library.path=/usr/lib/jni I'm using the following plugins: JRebel and m2e. I'm desperate for a solution because this problems causes me a great deal of time loss. System: Ubuntu 12.04 LTS 64 bit, 4GB mem, Intel core i7 860 @ 2.8 Ghz. Hope somebody knows a solution. Thank you for your time.

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• Dovecot starting and running, but not listening on any port

  - by Dženis Macanovic

  Among others things I'm in charge of a Debian GNU/Linux (Wheezy) DomU for the mail services of the company i work for. Yesterday one HDD that was used for this particular server has died. After installing Debian again, Dovecot decided to no longer listen on any ports (checked with netstat -l). Other services (like Postfix and MySQL) work without problems. dovecot -n: # 2.1.7: /etc/dovecot/dovecot.conf # OS: Linux 3.2.0-3-amd64 x86_64 Debian wheezy/sid ext3 auth_mechanisms = plain login disable_plaintext_auth = no first_valid_uid = 150 last_valid_uid = 150 mail_gid = mail mail_location = maildir:/var/vmail/%d/%n mail_uid = vmail namespace inbox { inbox = yes location = prefix = } pass db { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = mail mode = 0666 user = vmail } } service imap-login { inet_listener imaps { port = 993 ssl = yes } } service pop3-login { inet_listener pop3s { port = 995 ssl = yes } } ssl_cert = </etc/ssl/private/mail.crt ssl_key = </etc/ssl/private/mail.key userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol imap { mail_max_userip_connections = 25 } UID 150 is vmail (I double checked file permissions). I didn't install Dovecot from source, but via apt from the official Debian US mirror. There are no messages concerning Dovecot in /var/log/syslog except for: Oct 21 06:36:29 server dovecot: master: Dovecot v2.1.7 starting up (core dumps disabled) Any ideas?

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• Advice for UPC/Surge Protector in home office

  - by Fred

  I'm just starting out as an independant developer, mostly Unix stuff with some Windows thrown in occasionally. I've been running two machines, a linux and a windows dev machine. Long story short, we had a bad storm come through last week and I unplugged one machine, forgot to unplug the other and the p/s and mobo ended up dead. Luckily I backup to an external service religiously (rsync.net for anyone interested), so there was no loss in data, but it did show me a glaring hole in my current setup, namely, lack of UPC and Surge Protection (this has honestly never been an issue before). Can anyone recommend a UPC/Surge Protector for a home office? It only needs to support a single machine (I opted to use vmware instead of rebuilding that machine), but it's a quad core Phenom 2 with a 1k watt p/s. This is outside my experience so I thought I'd get some input from others. I'm looking for something that's reasonably priced and does the job reasonably well. I don't need absolute 100% uptime, just something to protect my PC better than it is now.

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• Size of modules within initrd

  - by LiKao

  I am currently trying to manually replace the kernel within ubuntu-core on an embedded device with a custom kernel. However when I try to update the initrd my initrd becomes much bigger. Here is what I did: Extract the initrd that was shipped with ubuntu Make a list of all modules within the old initrd get the same modules from the new module director at /lib/modules/new_kernel_version add these modules to the initrd and remove the old ones If I do this my initrd becomes quite bigger than the original one, so I checked the individual modules. I picked the btrfs.ko filesystem driver as an example. So by comparing these two modules I noticed the one I just picked into the initrd was much bigger, which caused the difference in size. -rw-r--r-- 1 root root 999K Nov 14 15:06 btrfs.ko For the btrfs.ko within the shipped initrd. -rw-r--r-- 1 root root 7.2M Nov 14 15:08 btrfs.ko For the new btrfs.ko. What is different between these two modules? Could this be caused by some faulty setting for the new kernel? When producing the kernel I copied /proc/config.gz and used make oldconfig to update it, so all optimisations should be the same for both kernels. Or is there something else which is being done to the modules before they are put into the initrd? Maybe is there even some better way to build a new initrd for the new kernel in ubuntu altogether. Update: I just also tested with an initrd which I created from scratch using the mkinitrfs command within ubuntu, and it has the same size difference that I found for the initrd I manually updated.

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• SNMP query - operation not permitted

  - by jperovic

  I am working on API that reads a lot of data via SNMP (routes, interfaces, QoS policies, etc...). Lately, I have experienced a random error stating: Operation not permitted Now, I use SNMP4J as core library and cannot really pinpoint the source of error. Some Stackoverflow questions have suggested OS being unable to open sufficient number of file handles but increasing that parameter did not help much. The strange thing is that error occurs only when iptables is up and running. Could it be that firewall is blocking some traffic? I have tried writing JUnit test that mimicked application's logic but no errors were fired... Any help would be appreciated! Thanks! IPTABLES *nat :PREROUTING ACCEPT [2:96] :POSTROUTING ACCEPT [68:4218] :OUTPUT ACCEPT [68:4218] # route redirect za SNMP Trap i syslog -A PREROUTING -i eth0 -p udp -m udp --dport 514 -j REDIRECT --to-ports 33514 -A PREROUTING -i eth0 -p udp -m udp --dport 162 -j REDIRECT --to-ports 33162 COMMIT *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT ..... # SNMP -A INPUT -p udp -m state --state NEW -m udp --dport 161 -j ACCEPT # SNMP trap -A INPUT -p udp -m state --state NEW -m udp --dport 162 -j ACCEPT -A INPUT -p udp -m state --state NEW -m udp --dport 33162 -j ACCEPT ..... -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT

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• Linux file server for an inexperienced admin

  - by Pat

  A charity I volunteer for wants a file server for their mostly Windows machines (about five XP and 7 machines, with some Mac laptops every now and then). For the server, I have a PC with an Intel Core 2 Duo 3GHz proc, 4GB of DDR2 400MHz RAM, and a 500 GB HDD. (I should point out that they do not currently have any server - they are just using Windows to share a folder on one of the PCs.) What is a linux distro that is easy to configure for Windows file serving yet stable and secure enough to protect sensitive data without an expert sysadmin? I'm guessing that a Debian distro would probably fit the security bill, but I don't know of any tailored to novice sysadmins. Also, are there any killer apps for making this easy to administer and set up (as a Windows file server, in particular - this answer is a good example)? Would FreeNAS be sufficient? Once it's all set up, what are the minimum measures I need to take to keep the data secure? I found this somewhat helpful answer, but it's not specific to my question of just getting a secure file server up, running, and maintained.

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• Watchguard Firebox "split" fibre optic line into 2 interfaces

  - by fRAiLtY-

  We have a requirement on our Watchguard Firebox XTM505 to be able to split our incoming external interface, in this case a fibre optic dedicated leased line, 100/100. We use the line in our office of approx 30 machines however we also re-sell to an external company who utilise it to provide wireless internet solutions to the public. The current infrastructure is as follows: Data in (Leased Line) - Juniper SRX210 managed by ISP - 1 cable out into unmanaged Netgear switch - 1 cable into our firewall and office network, 1 cable to our external providers core router managed by them. We have been informed that having the unmanaged switch in the position it is poses a security risk and that a good option would be to get our Watchguard Firewall to perform the split, by separating our office onto a trusted interface, and by "passing through" the external line to their managed router. It is alleged that the Watchguard is capable of doing this and also rate limiting the interfaces, i.e. 20mbps for the trusted interface and 80mbps for the "pass-through", however Watchguard technical support don't seem to be able to understand what we're trying to achieve. Can anyone provide any advice on whether this is possible on a Watchguard device and how or perhaps if there's a better way of achieving this, perhaps with a managed switch instead of unmanaged? Cheers

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• Why is my computer randomly restarting? How can I fix it?

  - by kinglime

  I have a custom built desktop computer that I've been using since about a year ago. The main specs are: ASUS P8Z68-V LE Motherboard Intel Core i7 2600k Corsair Vengeance 16GB Ram ASUS ENGTX570 GPU Corsair TX650M PSU I was running an overclock of 4.4ghz for my cpu (I have a Hyper212 EVO) and 1600mhz for my RAM but have it currently turned off due to my issues. I am also currently running Windows 8 but this problem occured in Windows 7 too. Basically my issue is that seemingly randomly, with no pattern my PC will reset itself and ASUS Anti-Surge will alert me that something went wrong. This issue is not related to system stress. I can run it fine for an hour maxxed out on Prime95 then later I can be watching a mere YouTube video when it will randomly reset. This has been occurring probably for the last two weeks and it seems to be getting worse. I believe this might be related to the power supply but when I monitor it in the bios and in Windows it appears to be putting out the proper voltages. Also possibly related or not but my Nvidia drivers frequently temporarily fail and then warn me of some kind of kernel error? If I have to buy a new power supply that is what I'll do but I want to make damn sure that's the only issue at hand. Thank you everyone in advance, please help me diagnose the issue and tell me what I can do to fix it. If you need any additional info about my setup please ask me.

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