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• What is the best way to configure the number of workers in Apache?

  - by rbm

  My site receives a lot of traffic for 2 hours during the day (2000 hits per minute). The rest of the day receives less traffic(500e hits per minute). I have been experimenting with the MaxClients and MaxSpareServers values but I still get some downtime during peek hours. How can I calculate the best values for my configuration based on the amount of ram that I have ? Each process is like 36-40 M of Memory total used free shared buffers cached Mem: 3096 793 2302 0 0 0 -/+ buffers/cache: 793 2302 Swap: 0 0 0 Values that I am using now <IfModule prefork.c> StartServers 10 MinSpareServers 22 MaxSpareServers 60 ServerLimit 90 MaxClients 90 MaxRequestsPerChild 400 </IfModule>

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• I need to make Windows 7 STOP disabling the wifi adapter when the wired LAN is connected

  - by Escobar Ceaser

  This is a Dell Latitude E6430. There is a setting in the bios to control this behavior and I have DISABLED it but it still happens. I am also running the latest bios. When I plug in a network cable the wifi adapter becomes disabled. I need it to stay enabled. What else could be making this happen? EDIT: The reason I need to do this is because with NETSH WLAN commands you can create a wifi hotspot by sharing the internet connection on the wired adapter and broadcasting a ssid on the virtual wifi nic. I do this all the time but it's not working on this laptop. I'm wondering if it's a network security thing where I am. I'm going to try from my hotel tonight and report back.

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• Grepping through the results of apachectl -S

  - by CamelBlues

  I have a server with about 300 virtual hosts. When I want to make sure a specific httpd.conf file is loaded into the Virual Host config and the syntax is correct, I run apachectl -S. The problem is, though, I get a ton of output. I've tried apacectl -S | grep 'foo' and apachectl -S > foo.txt to try and make this data a little bit more manageable, but the output of the command is not conducive to grepping or shoving into a text file. When I try apachectl -S | grep 'foo', it simply returns the entire output of apachectl -S. When I try apachectl -S > foo.txt, foo.txt is an empty file. This may have something to do with how the server is configured, because I am able to successfully grep on my local machine. Any suggestions?

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• New Servers Active Directory and Exchange

  - by user3164638

  I have 3 Dell PowerEdge server, each with 2 quad-core processors. I am going to bring this office out of the stone-age network (P2P, share files on a flash drive, emails through Google, etc) and set up Active Directory and Exchange 2013. Our needs are not that great at the moment - our staff consists of approximately 40 people, and our network may eventually be managed by an external company. We need only one domain for our emails (though we may serve emails for a few other partners domains as well). I was thinking of setting something up like this: Server 1: Primary DC. Active Directory and Exchange on separate virtual machines. Server 2: Redundant of server 1. Server 3: Shared resources, storage, backups, etc. How would you utilize 3 servers for an Active Directory / Exchange setup for a small/medium office? We do have plans to grow, so my solution must be scalable, though I'm not sure that I want to split permissions, though I'd consider it if that was something that could be changed on down the road.

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• Windows 7 extremely long startup

  - by Tyler

  Windows 7 before it even gets to login. On the "starting windows" splash screen takes no less than 15 minutes to finish more like 25 minutes most times. During this time the hard drive activity led indicator is blinking maybe once every 20 seconds. When I finally get to the desktop everything runs normally. I have unplugged all peripherals with same result. Ideas? It's 32bit. 4gig memory. Fast CPU which I can't recall off the top of my head.

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• aptana/eclipse blocks other apps

  - by waquner

  Hi, I've got a fresh win7 installation, the only apps installed so far are aptana (beta 3)/eclipse and firefox + chrome (except antivirus and drivers) Every time I start aptana, chrome and firefox are blocked, so firefox can't load a webpage (or sometimes takes veeeery long) and chrome doesn't even take care of events (so for example hovering over a link doesn't change the cursor and a click does...nothing or typing in an url, press enter - nothing happens) First I thought, aptana downloads something and blocks my internet connection... but IE works well and also there are no signs in the taskmanager (cpu%, network or memory) When I close Aptana, all works as before. I tried updating Java, which didn't help... On my office-computer I use the same apps and it works perfect. Got any ideas? TIA, waquner

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• Window 7 hangs on using Adobe Reader

  - by SahilMahajanMj

  Window 7 often hangs when i open some pdf file with Adobe Reader. First of all, Adobe Reader crashes and as soon as it stops, the window hangs and after few seconds, it displays a message quoting "Dumping Physical Memory" in a typical Windows98 manner and then the system reboots. This problem persists each time i use Adobe Reader. However, i have installed Foxit Reader to view Pdf files. But there are some issues with that also. As sometimes i have editable files, which could be done in Adobe Reader's newest version only. Suggestions on how to solve this problem would be appreciated.

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• Is there a (free or commercial) print server which print PDFs from networks?

  - by Eonil

  I'm working in office which uses Windows server for printing. Because our printer supports only Windows driver. But here are Mac OS X also which requires network printing... I'm sure there is no driver of the printer for Mac. So I figured out an idea to do this. On the Mac, a virtual printer driver generates and sends PDF file to print server. Print server, prints PDF files with it's local printer. Is there a solution can do this? (free or commercial)

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• IPTables: allow SSH access only, nothing else in or out

  - by Disco

  How do you configure IPTables so that it will only allow SSH in, and allow no other traffic in or out? Any safety precautions anyone can recommend? I have a server that I believe has been migrated away from GoDaddy successfully and I believe is no longer in use. But I want to make sure just because ... you never know. :) Note that this is a virtual dedicated server from GoDaddy... That means no backup and virtually no support.

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• "The requested operation could not be completed due to a file system limitation" 3202

  - by user46529

  I backup SQL Server database and it fails BACKUP DATABASE dd TO DISK = '\backupServer\backups\dd.bak' WITH COMPRESSION, CHECKSUM, NOFORMAT, INIT , BlockSize = 65536 , BufferCount = 2200 , MaxTransferSize = 4194304 The backup size is 3TB and I have 6TB free space on bacup server. I am using backup parameters per SQLCAT whitepaper. Everything works ok when I backup to local HDD and it always fails when I backup to network share. After about 6 hours. Can't find why. Thank you. Yes. The backup over the network is fastest and saves me 3Tb of local disk space :) Thanks for pointing to the memory issue. I left 4Gb to OS and it worked!

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• Create True VLAN over RAS

  - by Bigbohne

  Hi, I was wondering if it's possible. I want to create a virtual network over RAS using Windows Server 2003. The Client should be able to connect to the server using L2TP and should get an IP Adress from a private Range (lets say 192.168.1.100 - 192.168.1.200 and a subnetmask of 255.255.255.0). Now each client connected to the server should be able to ping another connected client. e.g. 192.168.1.123 <- 192.168.1.145 via RAS via the server. Is this possible? And ... how ? best regards, andre

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• Error connecting to the application.

  - by ahmed

  Hi guys, let me explain you the current scenario. We have a asp.net application on framework 2 running on intranet(Windows 2003 Server and Sql Server 2000). Now we have a xp machine where we installed and configured IIS with a virtual directory pointing on the local Xp machine and this machine is connected to our intranet. We have copied the same application files of the server to this XP machine. But the thing is the connection string/database of the application is pointing towards the intranet server. The problem is when we try to run the application on the XP machine we get this error : An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) Is this query related or concerned with this site or stackoverflow ?

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• Server Sizing Methodology

  - by adbrpc

  Our development environment consist of JBoss 5.0.1 DB Server, SQL Server 2008, Oracle IDM. Hardware is Win 2008 32 bit, 4GB RAM. We have reached stage where our environment can not handle application resulting in JBoss shut down throwing out of memory errors and CPU reaching to 90% usage. I am looking methodology to calculate correct server sizing where I input TPS, max number of concurrent users, max CPU utilization etc.. to give me number of servers, RAM size, number of cores. I am expecting application to grow 10% annually. Load Balancer and Failover should also be taken in account while sizing.

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• DIagnosing another Windows 7 Lockup

  - by MSEoris

  Im running windows 7 on a fairly modern machine (8gb ram, amd fx-6100, gtx 560ti) and I notice that periodically my windows seems to just hang for a little while. Frequently this occurs after a cold boot and i start up five or six small to medium sized programs, but also occasionally it occurs during normal usage. Basically what occurs is the screen locks up, there is no keyboard responsiveness for a period of 30 seconds to a full minute - after a bit of patience, control is returned, but I'm interested in figuring out what is causing such lockups. I checked the event log and dont see any issues, and all i can see in task manager is a spike in cpu and memory usage right after this occurs. Any tips on how to even begin to diagnose this? Thanks.

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• bottle.py on EC2 micro instance causes 2 order of magnitude slowdown

  - by user61633

  Cross-posted from StackOverflow: I wrote a little toy script to solve this type of game, and put it on my new micro EC2 instance. It works perfectly, but while it takes around 0.5 seconds to run a local version, and takes under 0.5 seconds to run both the local and the bottle.py version on my home computer, running the bottle.py version on the EC2 instance takes over 2 minutes. Python has the cpu pegged at 99% the entire time. Only 7.4% memory usage, consistently, and no swapping. The only guess I have is initialization time for bottle.py on EC2, but if it were that, why would it be ~200x faster on my own computer with bottle.py?

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• Prevent Virtualbox intercepting certain key combinations?

  - by Blazemore

  Is it possible to prevent my Windows 7 guest OS intercepting Ctrl+Up/Down, and allow my Ubuntu how to intercept them instead? I have a dual-monitor setup with two vertical virtual desktops on Ubuntu. I have a Windows 7 fullscreen guest on one monitor, set to always display on the current workspace. This means I have effectively two vertical workspaces on one monitor, and just Windows 7 on the other. The problem occurs with Windows 7 is focussed and I hit Ctrl+Up/Down to switch workspaces. I have to click out of the VM first, which breaks my workflow. Can this be fixed?

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• pfSense router gives DNS rebinding warning when accessing subdomains

  - by Richard Maddis

  I have just set up a router running pfSense on our network and forwarded the appropriate ports. I have a small web server running in my network, and a domain name pointing to our (WAN) IP. When accessing that domain name, everything works fine. However, when accessing a subdomain of the domain name, pfSense will give a DNS rebinding warning. This did not happen back when I used a DD-WRT router. What is the proper way to fix this? The DNS records for the subdomain also point to the same address (I use a virtual server to differentiate the subdomains.)

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• Script/scheduled task to clean up Dowloads folder (Windows 7)?

  - by Andrew

  My downloads folder is my primary connection to the internet (and thus the world), and has rapidly become a virtual junk drawer. I imagine I'm not alone here. What I'd like to do is have some sort of a script that -creates a new folder (named YYYY_MM Archive so it sorts nicely) -takes everything* inside of the Downloads folder (for the current user) -moves it to the new folder and have this run once/month. *(excluding previous archives) This strikes me as the type of thing Saw some answers on related questions that seemed to suggest that this is an eminently doable task in PowerShell. Is it? I'm on Windows 7 Enterprise.

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• Cant get sub-domain created by Plesk working

  - by RN.

  Apache 2.2 CentOS Plesk 9.x I am using Plesk to manage my domain names on my virtual host.and GoDaddy for DNS I have created a new sub-domain blog using Plesk. I can see the httpd.include for example.com has a new virtualhost entry - blog.example.com I can also see folders have been created for the subdomain blog vhost\example.com folder But when I try to go to blog.example.com in the browser- I get an error - basically the host is not getting resolved. My site - example.com is working fine otherwise Any idea what could I be missing ? I did try restarting the apache web server as well

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• X11 forwarding from one server to other

  - by n3oblit7

  I have a setup where I need to forward X11 from my local machine (laptop) to a Virtual machine. The server hosting this VM cannot be reached directly from my laptop. I need to first login to a gateway and from this gateway, I can access the VM. How can I forward X11 from my laptop to this VM? I have tried following but these do not work: [laptop # ] ssh -X [gateway] [gateway # ] ssh -X [VM] [laptop # ] ssh -tX [gateway] ssh -X [VM] I could forward X11 only till the gateway. (DISPLAY variable gets set on gateway)

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• Application deployment with Puppet

  - by michaeltwofish

  I'm new to Puppet and while I've been using *nix systems for many years, I've never worked as a sysadmin or in ops. I'm currently writing Puppet manifests for hosting a set of (PHP/MySQL/MongoDB, code in git) web applications. Clearly Puppet needs to have some knowledge of the actual applications because I'll set up a virtual host for each one, but I'm not sure whether Puppet should be managing things like code deployment and database creation. Is Puppet an appropriate tool for application deployment? If not, can you recommend a more appropriate tool?

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• Couchdb failing test suite on Linux

  - by user52674

  Hi I've been trying to install CouchDB on my webfusion virtual server. I followed the latest instructions from the webfusion forum (see: http://forum.webfaction.com/viewtopic.php?id=2355 ) and it runs (just) Futon is very sluggish and I get 502 errors. Anyway when I run the test suite it fails on multiple tests. Webfaction support have been great but don't have erlang experience to interpret the error logs. Can anyone help me know what might be wrong? Test suite result: basics, all_docs, attachments, attachments_multipart, attachment_names, compact, config, conflicts, delayed_commits, design_docs, design_options all the errors are: Exception raised: {"error":"unknown","reason":"\u000d\u000a502 Bad Gateway\u000d\u000a\u000d\u000a<\h1502 Bad Gateway\u000d\u000a nginx\u000d\u000a\u000d\u000a\u000d\u000a"} except for 'compact; which also has: Assertion failed: xhr.responseText == "This is a base64 encoded text" Assertion failed: xhr.getResponseHeader("Content-Type") == "text/plain" I'm stumped. Anybody know what these indicate? AL

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• Server OS: put it on a separate drive? Yes, no, or depends on the situation?

  - by captainentropy

  Hi, I would like opinions, or facts, both preferably, on whether it's ok to install a server's OS on the RAID array or not. I would predict installation on separate drives is the best but I'm interested in the performance. The server in question will have 8 cores (2.4GHz ea.), 24GB RAM, and ~16TB of usable space of server-class drives in RAID10. There is also a subsytem of an ~equivalent size for backup. I will be running CPU/memory intesive applications on this server in addition to it being file storage for my work (research lab). IF I install the OS (haven't decided which one, probably Ubuntu or Fedora or some other good linux distro) on separate drives will there be any performance problems if they aren't configured in RAID10? IF it is better to have the OS on separate drives should I go for 150GB velociraptors in RAID1 or smallish SSD drives in RAID1? Money is unfortunately a factor as I think I'm close to maxing my budget as it is. Thanks!

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• Is there a difference in page fault rates between CPU bound and I/O bound processes?

  - by user198864

  I was thinking, should there be any difference in expectation of the page fault rate on CPU-bound vs I/O bound processes? At first I thought maybe we could, since CPU-bound processes would likely be using more memory accesses per time quantum, so I expect it would move from locality to locality faster. At the same time, the CPU-bound process is probably given a larger working set... but this doesn't affect the fault overhead as it hits a new locality IF this wasn't pre-paged in. Is there actually any real difference in the page fault rates or am I just musing about something nonexistent? And if there is, how would it impact a real-world OS like linux?

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• Linux freezes every few seconds

  - by Zeppomedio

  We're having an issue where one our Linux boxes (Ubuntu 10.04 LTS, running on EC2 with a quadruple-large size, 68GB of RAM and 8 virtual cores with 3.25GHz each) freezes up every few seconds. Typing in an ssh session will freeze, and running strace on one of the Postgresql processes that's running usually shows: 02:37:41.567990 semop(7831581, {{3, -1, 0}}, 1 for a few seconds before it proceeds (it always gets stuck at that semop). OProfile shows that most of the time is spent in the kernel (60%) versus 37% in Postgresql. The result of these halts (which began suddenly a day ago) is that load on the box has gone from 0.7 to 10+, and causes our entire stack to slow done. Any ideas on how to track down what's going on? iostat doesn't show the disks being particularly slow or overloaded, and top shows user cpu % spike from 8% to about 40% whenever these back-ups happen.

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