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• I just got a virus 6 mins ago, how? Situation.

  - by acidzombie24

  -Edit- for the people who say it isn't a virus. Norton does detect it as a virus, an icon was placed on my system tray and rkpg.exe is in my C: which was placed 6 min ago around the time my computer rebooted on its own causing me to lose data :@. Situation I on Windows XP, behind a Linksys router, I don't have DMZ on so nothing should be connecting to me. I had Firefox, MSN and Visual Studio opened. With C# I programmed a quick application to scan some pages with Internet Explorer. The site it was scanning was deviantART (which is pretty trustworthy), I doubt any banners there would hold a virus. I went to a suspicious site called freetxt.com but that was on Firefox and it didn't load the site. With an extra check I ping it and got this message "Ping request could not find host freetxt.com." The virus seems to be called braviax. Right now it brought up a message saying my computer may be infected? How on earth did it get in? I don't have uTorrent installed or any torrent or p2p applications. Nothing is installed on my computer that I haven't installed before and I know the exact time it installed because I see rkpg.exe on my C drive and my computer restarted on its own around the same time. For the previous 30 minutes actually the previous hour all I did was talk on MSN, not click any links (I went to freetxt on my own) and had that Internet Explorer thing running (which I programmed). How did it get in? I really doubt it came from a banner on deviantART and installed when I loaded the page with the webbrowser-control so something else may have happened? Is there any system defaults I should turn off? I have remote assistance off but even if it was on I shouldn't be infected due to the router not forwarding any ports?

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• Windows 7 automatically logs out when logging in

  - by Luke

  A Windows 7 HP x64 computer is set to automatically log in (no password), but once it starts logging in, it starts to load the desktop after the welcome screen, but before icons or background images are loaded, it goes to the Welcome screen saying 'Logging Off'. I can log in with Safe Mode, and I ran a couple different virus scans, with no detections. I also tried checking the userinit.exe file in System32 (as suggested by MANY users for Windows XP), but it's the same version as a working system. I also checked the registry under HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon for the SHELL and UserInit values, but they look normal. I tried to disable all startup items (through MSCONFIG) to select Diagnostic boot, but then I get a blue screen about the video driver not loading. Any other ideas? EDIT I created a new user, and it could log in no problems. I am thinking it's the NTUSER.DAT file. I just renamed it to NTUSER.DAT.old, then tried logging in as the problem user. I could log in, but as a TEMP profile. His profile folder is now C:\Users\TEMP, and his old folder is still accessible but in the wrong location. EDIT 2 I can't seem to turn off the TEMP profile, so I'm open to other suggestions. Copying the folders (i.e. Documents, Music, etc) does not work, as it creates an additional TEMP.000 then TEMP.001 folder each time the user logs in.

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• Updating ASUS BIOS on Windows 7 64bit

  - by joesavage

  I've recently decided that I want to try and utilize my two graphics cards so that I can have a dual monitor setup. Unfortunately Windows only seems to notice my most recent graphics card installation - and so I've been told that I should look into my BIOS and try to enable two graphics cards. I could not find this setting anywhere in my M2N68-AM Plus v0210 BIOS. After some further research I figured that I should perhaps upgrade my BIOS, so I searched and managed to download the latest version (v1804) as a ROM file. However I am having difficulty figuring out how to install it. I've tried using the Asus EZFlash feature built into my BIOS, but when trying to load up a variety of different ROMs that are for my motherboard/BIOS I get the error: Boot block in file is not valid! I'm not totally sure what I should do to fix this, so I'm looking into other methods of upgrading my BIOS - however I can't really find any solutions that seem to work. Asus Update is for 32-bit only, AFUDOS doesn't appear to work on my Windows 7 64-bit system (I think it's supposed to run in DOS or something - but that just sounds confusing since I know nothing about DOS). Could anybody help me with this?

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• ssh hangs on "Last login" line

  - by Pavel H

  This happened for the first time three days ago - I ssh to the server, authenticate using a password, get the welcome message but it remains hanging on the "Last login:..." line. The command line doesn't show and the server doesn't react to my input. Other services on the server keep working ok (apache, tomcat, database, ..). The box has an out-of-band management using which I was able to restart it. After the restart the ssh worked ok again and I didn't find anything suspicious in the logs. Three days later the same problem occurs on this box again, and newly on yet another server in the cluster - 100% same symptoms. Both servers have about 2 month old installation of Debian Squeeze (6.0.2) and the problem never occurred before despite frequent ssh-ing, so it should not be a problem of settings. We haven't been installing anything new for quite some time now. I also made sure there is enough disk space on both servers. Since it started to happen all of a sudden on two servers at about the same time, I suspect some bug may have been introduced via Debian updates, yet I haven't been able to find anyone with the same problem. Most similar issues I have found: ssh freezes at the "Last Login Line" - in our case everything worked fine until recently, so nothing related to settings should be our problem. Diskspace checked, I couldn't check the memory but I would expect something would be in the logs if the system had been running out of it. Remote Fedora system unresponsive, odd but consistent behavior when trying to log in - problem with high load on the server; unlike in this case, nothing changes even if I wait for 10+ minutes

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• Compare-Object gives false differences

  - by Andy

  I have some problem with Compare-Object. My task is to get difference between two directory snapshots made at different times. First snapshot is taken like this: ls -recurse d:\dir | export-clixml dir-20100129.xml Then, later, I get second snapshot and load both of them: $b = (import-clixml dir-20100130.xml) $a = (import-clixml dir-20100129.xml) Next, I'm trying to compare with Compare-Object, like that: diff $a $b What I get is in some places files that were added to $b since $a, but in some -- files that were in both snapshots, and some files, that were added to $b, are not given in Compare-Object output. Puzzling, but $b.count - $a.count is EXACTLY the same as (diff $a $b).count. Why is that? Ok, Compare-Object has -property param. I try to use that: diff -property fullname $a $b And I get the whole mess of differences: it shows me ALL the files. For example, say $a contains: A\1.txt A\2.txt A\3.txt And $b contains: X\2.mp3 X\3.mp3 X\4.mp3 A\1.txt A\2.txt A\3.txt diff output is something like that: X\2.mp3 => A\1.txt <= X\3.mp3 => A\2.txt <= X\4.mp3 => A\3.txt <= A\1.txt => A\2.txt => A\3.txt => Weird. I think I don't understand something crucial about Compare- Object usage, and manuals are scarce... Please, help me to get the DIFFERENCE between two directory snapshots. Thanks in advance UPDATE: I've saved data as plain strings like that: > import-clixml dir-20100129.xml | % { $_.fullname } | out-file -enc utf8 a.txt And results are the same. Here're excerpts of both snapshots (top 100-something lines, a.txt and b.txt), output of compare-object, and output of UNIX diff (unified). All files are UTF-8: http://dl.dropbox.com/u/2873752/compare-object-problem.zip

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• What Device/System to use as a "router on a stick"

  - by Jeff Leyser

  I need to create several distinct VLANs, and provide a way for traffic to move between them. A "router on a stick" approach seems ideal: Internet | Router with Trunking Capability ("router on a stick") * * Trunk between router and switch * Switch with Trunking Capability | | | | | | | | | | | LAN 2 | LAN 4 | | 10.0.2.0/24 | 10.0.4.0/24 | | | | LAN 1 LAN 3 LAN 5 10.0.1.0/24 10.0.3.0/24 10.0.5.0/24 We have trunk-capable Layer-2 switches. The question is what to use as the router on a stick. My choices seem to be: 1) Use an existing Cisco 5505 ASA firewall. It appears the ASA can do the routing, but it's a 100Mbps device, and so seems sub-optimal at best 2) Buy a router. This seems overkill. 3) Buy a Layer-3 switch. Also seems overkill. 4) Use an existing Linux Box as a router 5) Use a new Linux box as a router' 6) Something I'm not thinking of I think either (4) or (5) is my best option, but I'm not sure how to choose between them. I expect the amount of traffic that has to cross the VLANs to be somewhat small, but bursty. How much load does routing add to a CentOS machine?

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• I want to dual boot Windows 8 on a Macbook Pro that doesn't already have Windows. Do I have to buy Windows twice?

  - by Cam Jackson

  My girlfriend just bought a Macbook Pro, and she wants to to dual boot OSX with Windows. Specifically, she would like to use Windows 8. What I already know is the following: Windows 8 discs are only meant for upgrading from previous versions of Windows Windows 8 discs can be used to do a clean install, but (officially) only if there's already a legit version of Windows on the hard disk I've read somewhere of a disc being used to install Windows 8 on a fresh, out-of-the-box hard drive, and it all went well until the activation phase, where it said that the disc could only be used for upgrades The logical conclusion would be that in my circumstance, the only option is to buy a full (non-upgrade) retail copy of Windows 7, install that using boot camp, then load up Windows 7, insert the Windows 8 upgrade disc and do the 7-8 upgrade. However, I've read quite a few blog posts of people installing Windows 8 using bootcamp (e.g., Ars Technica, which leads me to believe that it might be possible to do so without installing Win7 first. The problem is that I'm not sure if these people were using preview versions, which obviously won't have the license issues down the track. Can anyone provide a definitive answer as to how to put Win8 on a Mac?

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• Need help toubleshooting PC

  - by brux

  I have had problems since my dog pee'd on my computer. Problem: loads windows fine, at random intervals from 5 minutes to 30 minutes it restarts itself. There is nothing in the event log such as errors, no BSOD, just cold restart. after restarting - sometimes- it POST's and restarts itself at the end of POST. It will do this many times and then finally load windows. The cycle then begins again, it will restart eventually. What I have done: I thought it was HDD at first, since this is the only part of the computer which actually got wet with any fluid ( the case is off the PC and the dog pee'd down the front where the HDD is located). Seatool, the seagate HDD tool, found errors when I ran it inside windows, so I ran it in DOS mode from boo-table USB and ran it. It found the same number of errors and fixed them all. I ran the scan again and it says "Good". I loaded windows and ran the scan and it also said "Good there. So the HDD appears to be fine but the problem persists, random restarts. What else could this be? I have taken the computer apart and cleaned everything and also taken the PSU apart and cleaned it thoroughly. The problem still persists, what should my next steps be?

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• DSL Connection drops

  - by user60024

  Ok, I just moved so I had to switch from Cable to DSL. I know very little about computers or internet connections and such, so I had AT&T come out to the new house to set up their highest speed. When they got here, they told me that I needed to downgrade to 3.5mbps because I was too far away. Well we did and everything was going great for two days until I started experiencing random disconnects which have been happening now for about 2 to 3 weeks. I am using a N300 Wireless Dual Band ADSL2+ Modem Router and my ethernet cable is hooked directly into my computer from it. I recently started to notice that it disconnects around 5:30 and 8:30, which may be because a lot of people are on their computers(?) and that it works perfectly fine, almost, all the time if I'm not playing a game. During this time, when I try to load up World of Warcraft the Internet light disappears and the DSL light begins blinking. (So maybe it's too much for the modem and it resets?) Other than that it is amazing, but I'd like to try and fix some of these problems. If you need more information, let me know on how to get it for you and what to do. Thanks for the help!

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• WD Caviar Green Extremely Slow

  - by Steven

  I am encountering a really weird problem on my WD Caviar Green HDD. Well first of all I have 2 HDDs on my Desktop, one 160GB Seagate holding my Win7 Ultimate x64 and the problematic one, WD 1.5 Caviar Green for storage purpose. My problem is kinda weird, when I transfer files from my Seagate(C:) to my WD (D:) the speed is good (50-60MB/s). Then the problem arises when I transfer too "many" large files, the transfer speed would go straight down to kilobytes/s. Well after I cancelled the transfer and access my D:, even entering a folder requires loading for like 10 seconds. Such problem not only arises when I am transferring files to my D:, it seems like my WD can't handle much activities. For instance, last time I installed my game on D: and I would face much lag after playing for some time. When the same game is installed on C: no problem arises. Does anyone knows what is the problem? P/S: There was one temporary solution that I used to tried. After the "situation" occurs, I tried to access as many folders on D: as I can and let it load, repeating such actions and giving it some time bring the D: back to speedy transfer. However, large transfers would causes the situation to happen again. Does it have something to do with cache whatsoever?

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• Understanding ulimit -u

  - by tripleee

  I'd like to understand what's going on here. linvx$ ( ulimit -u 123; /bin/echo nst ) nst linvx$ ( ulimit -u 122; /bin/echo nst ) -bash: fork: Resource temporarily unavailable Terminated linvx$ ( ulimit -u 123; /bin/echo one; /bin/echo two; /bin/echo three ) one two three linvx$ ( ulimit -u 123; /bin/echo one & /bin/echo two & /bin/echo three ) -bash: fork: Resource temporarily unavailable Terminated one I speculate that the first 122 processes are consumed by Bash itself, and that the remaining ulimit governs how many concurrent processes I am allowed to have. The documentation is not very clear on this. Am I missing something? More importantly, for a real-world deployment, how can I know what sort of ulimit is realistic? It's a long-running daemon which spawns worker threads on demand, and reaps them when the load decreases. I've had it spin the server to its death a few times. The most important limit is probably memory, which I have now limited to 200M per process, but I'd like to figure out how I can enforce a limit on the number of children (the program does allow me to configure a maximum, but how do I know there are no bugs in that part of the code?)

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• WIN7 constant BSOD 0x7B on boot, not producing any dump files where to go from here?

  - by prayingpantis

  So my one win 7 pc has been getting a BSOD on boot (roughly a sec after load screen starts) after a power failure. The complete stop code is 0x0000007B (0x80786B58, 0xC0000034,0x00000000,0x00000000) I've searched for quite a while now on the net and it seems like most people gave up after gettting 0x7B and no dump files. What I've tried so far: startup repair - reports it cannot repair computer automatically. BadPatch is reported somewhere in a problem signature contained in the problem details. startup repair with a WIN 7 CD - also fails, I can't recall what the error was, but it was not the same as the error produced with the start up tool shipped with the version of WIN 7 installed on my machine (I think the text had something ACL-ish contained in it) used a boot disk (Hiren's boot iso) - I used it to enable the CrashDump registry key and then after BSOD, read the HDD's dump locations but it was empty. Note, I'm quite sure the registry keys I edited are the correct ones, since the reboot on BSOD option was enabled by default and after I changed the regkey controlling this functionalitty to 0 the BSOD stayed after I booted again. check disk - works and returns no problems, also it seems I'm able to access all my files on the HDD. mem test - works and returns no errors So I'm not sure what else I can do to figure out what is the problem here. I read somewhere that you can use WINDBG to remote debug another PC, but I'm not sure if this is possible since the OS isn't even loaded yet? Also the last driver change I made on the system was installing a video driver, but I had no problems with it and were able to reboot several times until the power outage happened and the BSOD appeared. Any help or guidance for a way to DEBUG this problem would really be appreciated (I'm not really that keen to try a whole bunch of random fixes, I'd rather try and narrow down the problem first).

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• Web service for checking out / leasing a token

  - by JP Slavinsky

  I run a web site on AWS that has a number of web servers (say 4 of them) running behind a load balancer. For this particular web site, I have one license key of New Relic for doing instrumentation. At any one time, I only want one of the 4 web servers to be using the key. If that server goes offline, I want one of the remaining web servers to be able to begin using the license key. Does anyone know of a service that would let me manage this process? The service would not particularly need to store the key itself but rather just manage the fact that only one web server can lease out the right to use the key at any time. Something where the web servers would have to come back every few minutes and renew their lease, and if they don't it becomes available to someone else. I just realized I could maybe accomplish a hacked version of this using a file on S3, but that doesn't prevent race conditions / etc and is definitely hackish. Any thoughts welcome. FWIW, this site is built on Ruby on Rails. Thanks! JP

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• Windows Server 2008 IIS7 - page requests randomly hang or timeout

  - by seb835

  I've just installed a fresh copy of Windows Server 2008 x64 with IIS7 and PHP (fast CGI). However, I'm noticing that after moving my web site from a similarly specified machine to this one, I'm getting issues. The issue seems to be that randomly, as I'm clicking through the web pages being served, the browser will suddenly hang saying "waiting for mysite.com...". Sometimes the page will then timeout, or finally resolve after 20 to 30 seconds, but maybe missing the CSS style sheet. Very strange, as this is the only website installed on this new server, and only myself using/testing it. Server is installed in the same data centre below the old server. Has anyone else had a similar problem? I tried increasing the max workers pool to 10 (from 1), but this has no effect. Seems to happen most frequently after 1 or 2 minutes of inactivity on the website, then trying to load/refresh a web page. Many thank for any info and help. Kind Regards, Seb

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• PXELinux and compressed kernels/images

  - by Yvan JANSSENS

  Is it possible to boot compressed kernels with a compressed initrd with PXELinux? First, a little background: We created a custom Linux distro, for diskless OpenCL computing nodes. We want those nodes to fetch their OS from the network. Our Distro is composed out of a kernel (duh) and a large initrd which is loaded into RAM and everything is executed from there. We chose to run everything off the initrd for two reasons: NFS was not an option to serve the filesystem's extra contents Fast file access from RAM. No persistent storage needed, data and config is pulled dynamically through a SOAP service. Now our initrd is about 450M in size. At our network speeds, it takes about two to three minutes to load a single client. Will compression speed up te downloading, and if yes, which one should be used? Is LZMA supported by PXELinux, or do we need to stick to bzip2 or gzip? Because of the 2-3 minutes loading time, booting 15 nodes over the same network link takes quite a lot of time. We decided not to use hard drives or CD/DVD drives, for financial reasons (cheapest HDD @ €30 times 15 is a lot of money saved ;-) ) So, our question is: what compression options are available for this setup? And how do we do this? Thank you for your time! Yvan Janssens

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• Can I install windows on an SSD and access data from my old windows HDD?

  - by nzifnab

  I purchased new computer components, switching my hardware from AMD and Radeon to Intel and Nvidia. I kept components from my old computer like the powersupply and two HDDs. Everything appeared to install correctly and the system booted into the BIOS just fine (after a brief snafu with the CPU fan). My goal was to use the two harddrives and just be able to turn on the computer and load up my old windows install with all the files, programs, and documents. I expected to have to call Microsoft to re-register the windows install for the new hardware (since I had to do that last time I upgraded w/ the same windows version). When the computer attempts to boot into windows it briefly flashes a bluescreen and then restarts. System recovery gives a message something like "BadDriver Failover" something something. I assume this is because it's trying to use amd drivers for an intel chipset (or something...?) and I've been as-yet unsuccessful in getting it to boot into my old windows partition. SO! I decided eff it, maybe I'll go visit my nearest Micro Center and buy a 200 GB SSD, install windows onto that, and then... be able to access just the contents of both of my other harddrives? I don't intend on running any of the programs but there were some saved files I would like to salvage from the 500 GB harddrive, The 1.5 TB harddrive only had files on it, no OS or applications so I'd also expect to still be able to access it. Is this possible? Can I install the SSD and only format/install windows onto it and still access the contents from my two transferred-over drives?

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• Is my motherboard failing, or is there some other issue?

  - by ThatGuy

  So, several months ago I put together my own desktop PC. I set up a dual boot to Windows and Ubuntu. Recently, without changing any settings or installing anything new, the wifi stopped working on windows (I use a wifi adapter). It said it was connected, Network settings showed that it was working and running trouble shooting had no results. My internet still works on any other device. I found that removing the adapter from the motherboard and plugging it back in was the only thing that fixed the problem. Reinstalling the wifi drivers did not help. I purchased a new Wifi adapter, but the problem persists. More recently, I had a much more discouraging development. Sometimes, turning on the computer results in a boot loop: BIOS never starts. Instead, the monitor turns on as if it got a signal, then immediately turns off. This loops on it's own indefinitely until I hold down power, hard reset it, and try again. Sometimes it works, sometimes it doesn't. I haven't tested much on the Ubuntu side. It appears that wifi works at least some of the time, but since I've had issues just getting to BIOS I'm not confident the issue is on the software side. I've also noticed issues with some of the USB ports no longer working, but that seems to be off and on. Finally, as of a few minutes ago, I booted to windows to discover that everything was running very slowly. Slow here is a relative word, but I have a Samsung 840 pro SSD and I'm used to applications running nigh instantly, and it was a solid 3 minutes before any of my applications would load. Anyway, my question is this: Is it likely that my motherboard is failing? Either way, what steps can I take to try and pin down the problem and figure out what to do?

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• mysql - moving to a lower performance server, how small can I go?

  - by pedalpete

  I've been running a site for a few years now which really isn't growing in traffic, and I want to save some money on hosting, but keep it going for the loyal users of the site and api. The database has one a nearly 4 million row table, and on a 4gb dual xeon 5320 server. When I check server stats on this server with ps -aux, i get returns of mysql running at about 11% capacity, so no serious load. The main query against mysql runs in about 0.45 seconds. I popped over to linode.com to see what kind of performance I could get out of one of their tiny boxes, and their 360mb ram XEN vps returns the same query in 20 seconds. Clearly not good enough. I've looked at the mysql variables, and they are both very similar (I've included the show variables output below, if anybody is interested). Is there a good way to decide on what size server is needed based on what I'm coming from? Is it RAM that is likely making the difference with the large table size? Is there a way for me to figure out how much ram would be ideal?? Here's the output of the show variables (though I'm not sure it is important). +---------------------------------+------------------------------------------------------------+ | Variable_name | Value | +---------------------------------+------------------------------------------------------------+ | auto_increment_increment | 1 | | auto_increment_offset | 1 | | automatic_sp_privileges | ON | | back_log | 50 | | basedir | /usr/ | | bdb_cache_size | 8384512 | | bdb_home | /var/lib/mysql/ | | bdb_log_buffer_size | 262144 | | bdb_logdir | | | bdb_max_lock | 10000 | | bdb_shared_data | OFF | | bdb_tmpdir | /tmp/ | | binlog_cache_size | 32768 | | bulk_insert_buffer_size | 8388608 | | character_set_client | latin1 | | character_set_connection | latin1 | | character_set_database | latin1 | | character_set_filesystem | binary | | character_set_results | latin1 | | character_set_server | latin1 | | character_set_system | utf8 | | character_sets_dir | /usr/share/mysql/charsets/ | | collation_connection | latin1_swedish_ci | | collation_database | latin1_swedish_ci | | collation_server | latin1_swedish_ci | | completion_type | 0 | | concurrent_insert | 1 | | connect_timeout | 10 | | datadir | /var/lib/mysql/ | | date_format | %Y-%m-%d | | datetime_format | %Y-%m-%d %H:%i:%s | | default_week_format | 0 | | delay_key_write | ON | | delayed_insert_limit | 100 | | delayed_insert_timeout | 300 | | delayed_queue_size | 1000 | | div_precision_increment | 4 | | keep_files_on_create | OFF | | engine_condition_pushdown | OFF | | expire_logs_days | 0 | | flush | OFF | | flush_time | 0 | | ft_boolean_syntax | + - For some reason, that table formats properly in the preview, but apparently not when viewing the question. Hopefully it isn't needed anyway.

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• How to find out which process is hogging the linux server?

  - by user1149518

  We have a RHEL server. Today it suddenly became slow. Symptoms - It was responding slow to ping queries from other server. When I try to login using ssh, it was taking about 10 seconds to login. I was able to resolve the problem by doing some guess work. I killed one process which I thought was culprit. Which resolved the problem. Though I would like to know what's proper approach to detect the culprit in such kind of "slow server" situations. Le me know proper way to resolving such slowness issues and decting the process causing the slowness. These were the conditions when the server was slow - # vmstat 3 3 procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------ r b swpd free buff cache si so bi bo in cs us sy id wa st 1 1 176 6730868 285052 4899676 0 0 3 4 0 0 1 1 97 1 0 0 0 176 6751576 285064 4899704 0 0 0 115 15307 37171 1 1 96 3 0 0 0 176 6751948 285068 4899700 0 0 0 23 14813 39559 1 1 98 1 0 # top top - 16:38:18 up 150 days, 19:36, 64 users, load average: 1.68, 1.46, 1.44 Tasks: 1287 total, 2 running, 1284 sleeping, 1 stopped, 0 zombie Cpu(s): 1.3%us, 1.7%sy, 0.1%ni, 95.9%id, 0.7%wa, 0.0%hi, 0.2%si, 0.0%st Mem: 16620824k total, 9867124k used, 6753700k free, 287424k buffers Swap: 8193140k total, 176k used, 8192964k free, 4898996k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 26258 khk 34 19 130m 47m 7088 S 11.2 0.3 385:32.42 edm Though I would like to know what's proper approach to detect the culprit in such kind of "slow server" situations. Le me know proper way to resolving such slowness issues and decting the process causing the slowness.

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• What is the typical maximum number of database connections for Oracle running on Windows server ?

  - by Sake

  We are maintaining a database server that serve a large number of clients. Each client typically running serveral client-applications. The total number of connections to the database server (Oracle 9i) is reaching 800 connections on peak load. The windows 2003 server is starting to run out of memory. We are now planning to move to 64bit Windows in order to gain higher memory capability. As a developer I suggest moving to multi-tier architecture with conneciton pooling, which I believe is a natural solution to this problem. However, in order to support my idea, I want the information on: what exactly is the typical number of connections allowed for Oracle database ? What is the problem when the number connections is too high ? Too much memory comsumption ? or too many sockets opened ? or too many context switching between threads ? To be a little bit specific, how could Oracle Forms application scale to thousand of users without facing this problem ? Shall Oracle RAC applied to this case ? I'm sure the answer to this question should depend on quite a number of factors, like the exact spec of the hardware being used. I'm expecting a rough estimation or some experience from the real world.

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• lamp -- edit PHP file but doesn't change web output -- including die()

  - by Reid W

  Server is standard Linux server on Amazon Web Services. Cent OS 5/Apache/PHP 5.3. No APC. It's worked fine for over a year, but now when I edit some but not all PHP files on the server using vi, the changes don't affect the web output. For example, I edit myfile.php and put a die() at the top, but when I load the page in my web browser, instead of the die() I see the content that would show up if the die() weren't there. svn updating the file in question doesn't help either. Files are on an Amazon EBS partition symlinked to /var/www/html. Just to reiterate -- this has worked fine for a long time. Restarting apache didn't help, nor did rebooting the server. What's weird is that it's just some of the files but not all. File ownership/permissions are the same for the "good" and "problem" files. I'm not a Linux newbie but am at a complete loss with this, and couldn't find anything on Google either. Any hints would be much appreciated!

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• Windows 7 boot animation slows down startup by default?

  - by kngofwrld

  I just upgraded my HDD to an SSD drive. I am running a completely fresh install and enjoy the short boot time. I tweaked the startup to be as fast as I could by removing unneeded apps and such. Nor am I running a solid desktop background (which causes a 30-sec startup delay). I have a 2.1ghz 64 bit laptop with 4 gigs of ram, so it's not a liquid-cooled speed monster, but I checked some super high end PC boot vids on YouTube and noticed that they startup in almost the same time as my machine. I also noticed that the glowing Windows 7 animation plays all the way no matter how fast the PC is. I turned off the animation, and the startup time is unchanged. I turned on verbose startup info and noticed that it runs until the very end, where it looks like it just sits there for no reason waiting for something to happen for a few seconds. So now I think that the Windows 7 startup animation has a timer built into it that forces the computer to wait for no other reason than to play the full animation. Super-fast XP boot vids on YouTube seem to start much faster (and not just because they "have less to load"). Am I imagining things? My question is: How can I turn off not just the animation, but the timer for the animation. Here is a vid that tipped me off, I have no relation to the poster. (warning: soundtrack might be loud) http://www.youtube.com/watch?v=T5LkX3xejJ4

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• memory usage setting

  - by user127610

  everybody,the memory usage is too much,what can i do? top - 12:54:37 up 7 days, 4:38, 1 user, load average: 0.00, 0.00, 0.00 Tasks: 18 total, 2 running, 16 sleeping, 0 stopped, 0 zombie Cpu(s): 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 1048800k total, 917424k used, 131376k free, 0k buffers Swap: 0k total, 0k used, 0k free, 0k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1 root 15 0 2840 1364 1204 S 0.0 0.1 0:02.17 init 1161 root 14 -4 2320 600 420 S 0.0 0.1 0:00.00 udevd 1391 root 18 0 35512 1288 948 S 0.0 0.1 0:03.53 rsyslogd 1409 root 15 0 8432 1164 700 S 0.0 0.1 0:03.87 sshd 1416 root 18 0 3156 868 692 S 0.0 0.1 0:00.00 xinetd 1423 root 18 0 8672 716 292 S 0.0 0.1 0:00.00 saslauthd 1424 root 18 0 8672 488 64 S 0.0 0.0 0:00.00 saslauthd 1431 root 15 0 7020 1168 616 S 0.0 0.1 0:00.99 crond 1450 root 25 0 6236 1444 1228 S 0.0 0.1 0:00.05 sh 3328 mysql 15 0 799m 42m 4892 S 0.0 4.1 0:02.07 mysqld 15479 root 15 0 11304 3332 2688 R 0.0 0.3 0:00.06 sshd 15482 root 15 0 6372 1688 1404 S 0.0 0.2 0:00.00 bash 15497 root 15 0 2536 1044 864 R 0.0 0.1 0:00.00 top 20137 www 15 0 20672 14m 864 S 0.0 1.4 0:00.87 nginx 22351 www 16 0 52324 26m 9244 S 0.0 2.6 0:13.94 php-fpm 24231 www 16 0 51928 25m 9260 S 0.0 2.5 0:13.52 php-fpm 32682 root 15 0 35832 3228 864 S 0.0 0.3 0:02.18 php-fpm 32686 root 18 0 7368 1616 888 S 0.0 0.2 0:00.00 nginx

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• How much free memory should I have on my webserver?

  - by neanderslob

  I have a webserver that's currently hosting two Wordpress sites and some java-based collaboration software. The server has 2G of memory and is currently using about 1.8G of the available memory. Right now what's on here is pretty much a pilot project that's getting negligible traffic so I think it's pretty clear that I'll be needing more memory. I was wondering, if I was to release it, how I might anticipate my memory needs based on the traffic it gets. I've poked around on Google and what I've found has been a bit tenuous. Is there a good heuristic that one should use when calculating memory demands as a function of the base (no traffic) load on the server? For reference, the output of free -m can be seen below: total used free shared buffers cached Mem: 2048 1832 215 0 0 0 -/+ buffers/cache: 1832 215 Swap: 0 0 0 To me this looks like actual memory used and isn't an illusion due to caching or anything else. I figure the demands of my collaboration software will have to be experimentally tested so here's free -m without that software running: total used free shared buffers cached Mem: 2048 1109 938 0 0 0 -/+ buffers/cache: 1109 938 Swap: 0 0 0 My plan B to figure this out is to add a bunch of swap space to the server, give it some traffic and adjust according the the amount that swap gets used. I was just wondering if anyone had a good rule of thumb to estimate how much memory I should plan on in advance...or if what I'm thinking is nuts. Many thanks in advance (I'm really quite new to this).

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• RTL8188CE doesn't connect to any wifi access points

  - by Drakmail

  I'm using network manager to connect. Also, tryed iwconfig. Results are same. I even try to connect to open access point — results are same. More information: Drakmail@thinkpad-x220:~$ lspci | grep Network | grep -v Ethernet 03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01) Drakmail@thinkpad-x220:~$ uname -a Linux thinkpad-x220 3.1.0 #1 SMP PREEMPT Wed Oct 26 02:19:49 UTC 2011 x86_64 Intel(R) Core(TM) i5-2410M CPU @ 2.30GHz GenuineIntel GNU/Linux Drakmail@thinkpad-x220:~$ dmesg | tail -n 10 [ 846.901574] rtl8192c_common: Loading firmware file rtlwifi/rtl8192cfw.bin [ 906.812461] rtl8192c_common: Loading firmware file rtlwifi/rtl8192cfw.bin [ 966.728810] rtl8192c_common: Loading firmware file rtlwifi/rtl8192cfw.bin [ 1026.639676] rtl8192c_common: Loading firmware file rtlwifi/rtl8192cfw.bin [ 1030.925574] rtl8192c_common: Loading firmware file rtlwifi/rtl8192cfw.bin At this moment I try to connect to open wifi ap: [ 1031.252403] wlan0: direct probe to 00:24:8c:55:fa:ed (try 1/3) [ 1031.451943] wlan0: direct probe to 00:24:8c:55:fa:ed (try 2/3) [ 1031.651658] wlan0: direct probe to 00:24:8c:55:fa:ed (try 3/3) [ 1031.851354] wlan0: direct probe to 00:24:8c:55:fa:ed timed out [ 1086.544960] rtl8192c_common: Loading firmware file rtlwifi/rtl8192cfw.bin My distribution: Drakmail@thinkpad-x220:~$ cat /etc/*version AgiliaLinux release 8.0.0 (Sammy) (Something between Slackware and Archlinux). Also, I saw that wifi module to often trying to load a firmware file. Any ideas what it would be?

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