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• Oracle redo log performance degradation when inserting

  - by Aldarund

  I have a oracle 11g database. I'm testing in for inserts. The database running in noarchive mode. I have 3 redo log configured, each 2gb. I'm trying to insert data into test table. At begin it goes fine with 15k ins/second. I make a commit after 200 inserts. But after about 1.3m inserted records it become really slow, about 1-2k ins/second. As i noticed in resource explorer at this point we have filled all redo logs and so the inserts from this points work slow. So my question is why it become so slow when it fills redo logs, even if i commit each 200 records. And how this situation can be fixed ( except the turning off logging completely at inserts)

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• SPF records - what are the differences ?

  - by progeny

  I'm trying to set up an SPF record for my domain. I've read the RFC, been to Wikipedia, openspf.org, etc. but I'm still confused. What is the difference between 'a' and 'mx'? When do I use 'mx: rather than 'a:' or 'include:'? What's the point of '?all' (Neutral result) except for debugging? Why do so many people use '~all' (Softfail) instead of '-all' ? I've been to the Wizard (http://old.openspf.org/wizard.html) but I don't understand the questions.

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• How to configure something like "Reflexive ACL" on OpenBSD?

  - by Earlz

  My U-Verse modem has something called "Reflexive ACL" described as Reflexive ACL: When IPv6 is enabled, you can enable Reflexive Access Control Lists to deny inbound IPv6 traffic unless this traffic results from returning outgoing packets (except as configured through firewall rules). This seems like a pretty good way to keep from having to maintain a firewall on each computer behind my router that gets handed an IPv6 address. It sounds about like a NAT, which for my small home network is all I want right now. Now my modem sucks as a router though, so I'm in the process of configuring an OpenBSD router to do that. I've got IPv6 supported and all that and my OpenBSD router will hand out IPv6 addresses by rtadvd. Now I want to keep people from having instant access to my local network through IPv6. How would I best do something like Reflexive ACL with pf in OpenBSD 5.0?

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• Outlook 2010 : "An error occurred when setting schedule permissions"

  - by francisswest

  Computer: Windows 7 x64 Enterprise. Office 2010 with Outlook 2010. Exchange account and a couple of IMAP accounts connected to the Outlook profile. Error: When attempting to share the calendar with anyone (selected from the address book) by click on "Calendar Permissions" seen here You can add or remove people without issue, except that no matter what, even if nothing is done, just opening the sharing window and closing it, you get an error message that says "An error occurred when setting schedule permissions" Verified that the issue doesnt actually effect the sharing, or the general setting of permissions. The error however is disconcerting to my user, and I would like to alleviate the problem if possible. Thanks!

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• switch OFF syn cookies

  - by Nick

  We have several servers they have public IP's, but work together (one is with Load Balancer, orther with Apache Web server, other with MySQL and so on. Most of the ports are fire-walled, so only "local" servers can be connect there. However ALL servers have some ports that must be publicly open. We have SYN Cookies enabled and from time to time we got: possible SYN flooding on port 8080. Sending cookies. Port 8080 is not public. How we can switch OFF SYN Cookies for some ports (e.g. 8080, 3306 etc) or from some sources (e.g. our servers), but in same time SYN Cookies to be switched ON for all other ports, e.g. port 80. We found this similar problem, except our servers are with public IP's: SYN cookies on internal machines

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• Windows 7 + Bind on Ubuntu - DNS keeps stopping

  - by fistameeny

  I have a Bind DNS server running from Ubuntu 12.04 LTS Server 64 bit. In there, I've setup some local A records for internal websites, e.g. wiki.domain.local. Everything works fine, except that every so often (a few times a day), the DNS stops responding on client machines (running Windows 7). The only way I've found to fix it is to stop/start the dnscache service on the Windows machine. Sometimes if I just wait for a few minutes, the DNS will start to work again. I've checked the Windows event log and can't see anything relevant. I've also had a look in the Bind logs and can't see anything there. Has anyone experienced this before?

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• rsync windows to linux permission denied

  - by user64908

  Using Command rsync -avzP --delete --omit-dir-times ../../ [email protected]:/var/www/mysite/ I'm getting rsync: mkstemp "/var/www/mysite/.." failed: Permission denied (13) If ext is in the www-data group should I still set all the files to be owned by user www-data? I am trying to publish the files with rsync and then set the permissions using sudo chown -R www-data doc sudo chgrp -R www-data doc but I can't even rsync because of the permission denied. The SSH works fine, the rsync too except when it tries to write over or update some of the files in /var/www Client * Windows 7 * Cygwin 1.7.16 (GNU bash, version 4.1.10(4)-release (i686-pc-cygwin)) * rsync version 3.0.9 protocol version 30 Server * Ubuntu 12.04 * Apache2 * Root Accounts [ubuntu,ext] * Groups [www-data] * sudo vigr has www-data:x:33:ubuntu,ext I have already configure this http://stackoverflow.com/questions/2124169/cwrsync-ignores-nontsec-on-windows-7 This article has also managed to confuse me http://unix.stackexchange.com/questions/41687/how-should-i-rsync-files-in-var-www-if-i-want-them-to-be-owned-by-www-data What is the right procedure?

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• phpMyAdmin logs out when selecting database

  - by deed02392

  I'm having an issue with pma whereby after logging in (as root or the database owner), and trying to switch to a certain database, I am automatically logged out. I cannot do any actions on the database and in the page that loads immediately before I'm logged out I note that I can't see any tables in the database. The database is accessible by the cli mysql program and all records are still present. To clarify: Literally login works fine, I can browse ALL databases except the one of my projects. Trying to use that database causes the phpMyAdmin session to end. Thanks!

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• Squid 2.7 in offline_mode yet tries to contact DNS servers to resolve addresses

  - by William C

  I installed Squid 2.7 to act as a web cache on my laptop, so that I can browse previously-visited sites when I don't have WiFi. Except http_access allow all, I've made no changes to the default squid.conf configuration. When I turn offline_mode ON and disconnect from the Internet, and then I visit sites, I encounter The following error was encountered: Unable to determine IP address from host name for whatever.sitename.com The dnsserver returned: Timeout on any site I visit. What settings do I need to add to squid.conf so I can browse sites offline?

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• My computer is playing audio without any program open

  - by super x man

  This is the weirdest thing ever that has happened to my computer (running Windows 7). I haven't installed anything lastly, except lavasoft adware antivirus When my computer stats then audio starts playing, mostly hip hop There is no programs opened. I tried killing all unknown processed, no success. I tried resetting the firewall options of the antivirus, no success. If I disconnect from internet, then it works. The antivirus is not detecting anything. Is somebody is streaming from another house? Is that possible? and making my life impossible. How can I check and stop this?

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• .htaccess redirect not preserving http_referer header

  - by CodeToaster

  We're merging with another company, and we want to redirect content from their (Apache) website to our (IIS) site. When traffic arrives at our site, we inspect the HTTP_REFERER, and if the visitor was just redirected from the company's site that we just merged with, they'll be presented with a "splash" page announcing the merger. I've added the line... Redirect / http://www.oursite.com/ ...to their .htaccess, which works fine, except that when the browser is redirected it doesn't send the HTTP_REFERER header. I've tried redirecting with redirect codes 301, 302 and 307 (the default, I believe, is 302) and all have the same effect (redirects fine, but no HTTP_REFERER). Can anyone provide some insight into why HTTP_REFERER wouldn't be included?

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• Mouse/Touchpad not working in Mac OS X Lion Pre-Boot Authentication (PBA) with File Vault 2

  - by Chris

  I set up File Vault 2 in Mac OS X Lion with Pre-Boot Authentication (PBA). In PBA-login my USB-keyboard is working, while using a wrong keyboard layout. I can neither use my magic touchpad nor an USB-mouse in PBA. Thus I can't change the keyboard layout located in the upper right corner. I tried unplugging all USB-devices except keyboard and mouse. Nothing seems to help and the mouse cursor isn't moving. How can I get magic trackpad or USB-mouse to work in PBA login screen or manually set the used keyboard layout in PBA? Update: Still no (USB-)mouse or bluetooth trackpad support in File Vault 2 Login Screen. Today I talked to Apple Support for over one hour with no result. Every idea is appreciated.

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• how to setup a ssh acount with no terminal but port forwarding?

  - by admalledd

  I am trying to set up a new user account I can give to friends so they can SSH into my forward computer, and only allow forwarding of certain ports. I do not want my friends to have a shell, or be able to change what ports to where they are allowed to forward. example session: joe(friend) connects using PuTTY (that I have pre-set, he isn't good with computers) to example.com(my Internet facing computer) forwarding ports 8080,1990,25565 to him(with what ever end ports he wants, preferably they stay the same numbers) example ssh command to do similar (but he can still change the ports on my computer!) ssh -N [email protected] -p443 -L8080:192.168.1.2:8080 -L1990:127.0.0.1:1990 -L25565:127.0.0.1:25565 then, same story with other friend smith(same ports, same user even) except he is using linux, so cant use putty. is it possible to also leave default SSH functinality for all other users but this one? I found this when I was searching google, but alas, I did not quite understand what was being suggested, and I don't think they covered restricting port forwarding

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• Why doesn't the network drive not automatically connect?

  - by Sheldon

  I've set up samba on my Ubuntu desktop. It appears to be something to do with the server. With all user accounts on Ubuntu(except the default one I use all the time) windows isn't able to/doesn't automatically map the network drive. In other words: I am only able to to automatically map the network drive on windows with only one of the accounts created on Ubuntu. Edit: I am able to connect using other accounts, I'm just not able to automatically map using those credentials. Details: Windows 7, Ubuntu 12.10

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• Monitor has yellow tint when used with the graphics card

  - by artknish

  I have an nVIDIA graphics card when used produces an yellow tint on my monitor's display. I tried with another monitor and it had the same issue. I then switched back to my motherboard's inbuilt graphics output (not sure what the technical term is), and the display seems fine, except I can't get the optimal resolution of 1440x900 to work. So is my graphics card's life over? Or can I get it repaired? Any self remedies without calling a hardware guy? Should I try with a DVI cable? I've been using the VGA cable from my graphics card to the monitor so far. Thanks for your suggestions!

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• OS X SnowLeopard menubar icons appear/disappear in 8 second cycle

  - by Robot

  I just bought a new Mac Mini, and used Migration Assistant to move a user from an iMac to it. All went well, except a very strange behavior... the default OS X menubar icons like time, spotlight, etc (but NOT user installed app icons like dropbox or xmarks) appear and disappear in a very regular 8 second cycle. They appear for about 2 seconds, and then disappear for about 6. This is a screenshot with the icons, and this is a screenshot without them. This is very annoying and I have not found anything online with similar symptoms. Any ideas?

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• Connecte RemoteApp to Exising Session

  - by Fowl

  Due to the slightly retardedness of an app I've got to run, I've got a server auto logging in on boot with the app on auto start. Remote desktop at my leisure to check on its status, etc. Gross, but it works. Now I've tried out RemoteApp which seems to work ok (ie. remotes the notification icon, balloons...) except for the fact that it creates a new session (and therefore instance of my app) - this confuses the heck out of app and it means that if I was using 'full' remote desktop I lose all my state. "Restrict each user to a single session" doesn't work. IIRC "Windows XP Mode" uses RemoteApp and it doesn't seem to have any trouble switching between modes. So how can I connect to a running app?

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• what's the correct way to crop art when saving for web in Adobe Illustrator?

  - by jela

  I need to save a bunch of illustrations for web use, and I cannot find any 'crop to art dimensions' option when saving them. I've therefore been creating a new artboard for each illustration by clicking on the art with the artboard tool, then deleting the old artboard. This works OK except the new artboard ignores the stroke, so I then have to go back and tweak all the edges of the artboard before saving, or else the stroke edges get cut off. This gets old after hundreds of illustrations. Is there an easier way to do it?

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• Windows 8 Google Contacts Sync doesn't sync custom fields

  - by Nishant

  I installed Windows 8 Pro a couple days ago. In the in-built "People" app, since there were options to sync contacts with several third party services like Facebook, Linkedin etc., I wanted to sync my Google contacts to the People app. The sync was successful and all my contacts migrated properly. However, the age old problem of custom fields not syncing between Google/Apple/Windows apps is still present. If a field label in my Google contacts is 'iPhone', it doesn't sync! Nor do any other custom fields except 'home' or 'work' with numbers. Is there a solution to this or any other workaround?

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• Outlook stopped working after updating to Windows 8

  - by MikkoP

  I downloaded Windows 8 update from Microsoft's site and installed it. Everything works perfectly except Outlook. Sometimes receiving messages doesn't work for whatever reason. Now the problem is sending and replying. Before these two worked but after receiving messages started to work, these problems have occurred. When I try to press New to create a new email, I get the following error message Cannot create the e-mail message because a data file to send and receive messages cannot be found. To add a data file, such as a personal folder file, double click the Mail icon in Windows Control. When I try to reply a message, I get the following one The operation failed. An object could not be found. After the update Outlook worked ok. I've had other problems with Outlook too.

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• How to make a video card use DVI output by default in text mode?

  - by Igor Zinov'yev

  I have an ASUS ENGT440/DI1GD5 video card which has three outputs: DVI, D-Sub and HDMI. I am using both D-Sub and DVI, but my main monitor is connected to the DVI output. Everything works fine except for the text mode. The card somehow uses the D-Sub output in text mode when both monitors are connected (when I disconnect the D-Sub output and leave only the primary monitor connected to the DVI output, it's being used correctly). How do I make the card use only the DVI output (or both) in text mode?

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• Windows 7: How to change the taskbar font size

  - by Noah

  Windows 7 (Aero) does not offer an option to easily change the taskbar font size. BACKGROUND: I was using the Medium Text size of 125%. (Set via Control Panel\Appearance and Personalization\Display) The problem I found was that many programs, sad to say, Microsoft's included, don't scale or position properly at other than 100%. I've reset the DPI to 100%, and have been able to customize most of my windows settings for easy reading, except the task bar font size In Summary: There are many ways to change the taskbar font color. I'm looking to increase the actual font size.

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• How to execute a scheduled task with "schtasks" without opening a new command line window ?

  - by Misha Moroshko

  I have a batch file that creates a scheduled task using schtasks like this: schtasks /create /tn my_task_name /tr "...\my_path\my_task.bat" /sc daily /st 10:00:00 /s \\my_computer_name /u my_username /p my_password It works OK except the fact that when my_task.bat is executed - a new command line window is opened (and closed after execution). I would like to avoid opening this new window (i.e. to run the task in quiet mode, in the background). I thought to use start /b ...\my_path\my_task.bat but I don't know how, because since I have to call start from the batch file I need to precede it with cmd /c, which again causes the new window to open. How could I solve this problem ?

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• Multiple redirects with one domain on Apache

  - by hfranco

  I'm trying to figure out how to redirect one URL to one location: http://mydomain.com/admin to http://mydomain.com/admin And have all other requests from http://mydomain.com point to http://myotherdomain.com So essentially all other requests will redirect to myotherdomain.com except for http://mydomain.com/admin I've tried setting up a Redirect rule in Apache but I'm not having any luck. I get a "The page isn't redirecting properly" message. <VirtualHost *:80> ServerName mydomain.com ServerAlias www.mydomain.com DocumentRoot /opt/www/mydomain.com/ Redirect /admin http://mydomain.com/admin Redirect / http://www.myotherdomain.com </VirtualHost>

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• What would cause a single working website to not work on 1 out of 5 devices on a network?

  - by th3dude

  There is a specific website that loads up without problem on all machines on my network (both wired and wireless) except one laptop. This laptop is a Windows 7 machine that was just recovered using the recovery partition, so it is fresh. The site will not load in Firefox 3.6 or IE 8. The website is http://www.weightwacthers.com The site loads fine on my desktop, iPhone, and Droid, but not the laptop. In all my years in this business I've honestly never seen this happen. Also, 'Is it down for me or everyone' reports that it is indeed only me. What would cause this to happen?

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