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• How does java permgen relate to code size

  - by brad

  I've been reading a lot about java memory management, garbage collecting et al and I'm trying to find the best settings for my limited memory (1.7g on a small ec2 instance) I'm wondering if there is a direct correlation between my code size and the permgen setting. According to sun: The permanent generation is special because it holds data needed by the virtual machine to describe objects that do not have an equivalence at the Java language level. For example objects describing classes and methods are stored in the permanent generation. To me this means that it's literally storing my class def'ns etc... Does this mean there is a direct correlation between my compiled code size and the permgen I should be setting? My whole app is about 40mb and i noticed we're using 256mb permgen. I'm thinking maybe we're using memory that could be better allocated to dynamic code like object instances etc...

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• Memory consumption of each accept() call on server running on Windows 2008 [migrated]

  - by Atul

  I've written a simple and small server application on Windows 2008 that just accepts connections and does nothing else. I am doing memory footprint assessment of socket calls, What I found that each connection (after accept()) consumes at least 2.5 KB of memory. Interestingly, the memory is not consumed by the process that has accept() call but it consumed by a OS process. I believe it might be because of data structures being created inside OS for each connection. Now, I have two key questions: Is it possible by any means to reduce this memory footprint (by changing any parameters, configuration etc) ? If yes how ? (Because 2K for each connection would be too much if we planning server to accept millions of connections) If my server is intended to accept million connections, is it good idea to use Windows 2008 ? or shall I switch to some other OS? Please advice me.

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• Diagnosing high CPU waiting

  - by Will

  I have a monitoring server that is running icinga/collectd/graphite with about 50 hosts. I have noticed high load/slugging performance on the box. If you take a look at top, you'll see: Cpu(s): 0.6%us, 0.2%sy, 0.0%ni, 7.6%id, 23.4%wa, 0.0%hi, 0.2%si, 0.0%st Notice the HUGE %wa value, which as far as I know means a network or disk bottleneck. ifconfig shows no dropping packets and there's not a ton of bandwidth going on, so that leaves disk issues, right? There's not a lot of disk writing going on either...iotop is reporting we're only writing a little over 1 MB per second and the RAID tool reports everything is A-OK and write caching is enabled. How do I go about trying to figure out how to fix this? UPDATE: iostat -x output is: avg-cpu: %user %nice %system %iowait %steal %idle 0.62 0.10 0.31 9.65 0.00 89.31 Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda 0.21 33.34 83.55 16.54 1599.94 399.07 19.97 43.21 416.98 3.71 37.13

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• Does anyone using godaddy shared windows webhosting, have multiple websites on it and faced this pro

  - by Amr ElGarhy

  I have multiple website on the same shared hosting on godaddy server, its Deluxe Hosting - Windows plan. I asked before a question about this: http://serverfault.com/questions/13906/how-to-fix-subfolders-iis7-functionality But i feel that no one is facing this problem except me, so i want to know what i am doing wrong or if someone had the same problem please tell me. all my website are in subfolders from the root folder, the problem that all links are showing like this: www.example.com/example/...., www.anotherwebsite.com/anotherwebsite/.... such as this http://amrelgarhy.com/ Means the folder name is showing in the URL, i did all what i can and discussed with godaddy a lot, but they always tell that its a IIS7 problem. Did you face this problem before or know a solution for?

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• What does the "Maximum Frequency" number mean in the Windows Resource Monitor?

  - by nhinkle

  In the Windows Resource Monitor's CPU tab, there is a status box and graph for the "Maximum Frequency", right next to the "CPU Usage" values. What does this mean? The value is sometimes over 100% on my system... what could that imply? By looking at CPU-z's real-time report of the processor's clock speed, it seems to be loosely related to what frequency the CPU is running at, which would imply that it means "percent of maximum possible frequency the CPU is running at"; this would be of relevance on systems with SpeedStep and/or TurboBoost technology (or similar). Furthermore, setting the system to "power saving mode" lowers the "maximum frequency" value to around 60%, while setting it to "high performance" mode sets it to around 110%. However, the percentage does not seem to exactly correlate to the CPU speed being shown. What value is this actually representing then?

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• Apache 2.2 on Mountain Lion ignoring ProxyPass and sending request to DocumentRoot

  - by James H

  I have sickbeard running at 127.0.0.1:8081/sickbeard ProxyRequests Off ProxyPass /sickbeard http://127.0.0.1:8081/sickbeard ProxyPassReverse /sickbeard http://127.0.0.1:8081/sickbeard in httpd.conf And yet when I try and access http://example.com/sickbeard/ it gives me a 404, with this in the error log. File does not exist: /Library/Server/Web/Data/Sites/Default/sickbeard Which I think means it's ignoring the ProxyPass and ProxyPassReverse directives? Anyone know why this may be? For what it's worth, this setup used to work under Lion. I have the following modules loaded: LoadModule proxy_module libexec/apache2/mod_proxy.so LoadModule proxy_connect_module libexec/apache2/mod_proxy_connect.so LoadModule proxy_ftp_module libexec/apache2/mod_proxy_ftp.so LoadModule proxy_http_module libexec/apache2/mod_proxy_http.so LoadModule proxy_scgi_module libexec/apache2/mod_proxy_scgi.so LoadModule proxy_ajp_module libexec/apache2/mod_proxy_ajp.so LoadModule proxy_balancer_module libexec/apache2/mod_proxy_balancer.so Thanks for your time!

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• Windows 7 Professional doesn't mount my usb flash drive anymore

  - by Valter Henrique

  I have a Kingston flash drive which works fine in every computer that I insert it. But in my Windows 7 it doesn't mount anymore. Why this is happening ? When I insert the flash drive it seems that the Windows 7 recognize it, but when I hover the icon don't show the flash drive to remove it, as usually does. Any idea ? Thanks. Any idea ? Abrir Dispositivos e Impressoras, means, ' Open devices and printers' .

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• How to change GUI language in Outlook 2007

  - by user1466

  A new guy at work moved in from Denmark, which means that he initially logged in to our Outlook Web Access 2007 from a computer with Danish Windows. As a result, all the objects in the tree-view in Outlook are now in Danish. For example, "Inbox" is called "Indbakke". This prevails, even though he has now logged in locally on his assigned work computer which has English Windows. We're running Exchange 2003, if that matters. How do you change the language of the names of the objects in Outlook 2007? The "Microsoft Office 2007 Language Settings" tool doesn't do this, and I couldn't find anything relevant to this by googling either. In Exchange System Manager there are the "Details Templates" which define these things in different languages, but over on his mailbox there was no configuration option to change which language to use.

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• Asus V1S/V1V inverter cable

  - by Bill

  I have an Asus V1V, which is the same as the Asus V1S except for the video card. I have a problem where the screen will randomly lose brightness or flicker between being lit and not lit. The picture below is of the left hinge, with the cover removed. Pressing one of these cables affects this behaviour, and pressing it in place will resolve the issue for a few hours. To me this means the inverter cable is damaged. As the picture shows, there are two cables, an LCD cable and what I assume is an inverter cable. I purchased an LCD cable for my model of laptop, but have been unable to find an inverter cable. It seems not to exist. I would like some input on if an inverter cable actually exists, if it is likely the problem, or solutions in general to resolve this problem permanently.

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• Premature end of script headers

  - by Tony

  I often get a "premature end of script headers" error in my apache log which results to an internal 500 error. I understand what the error message means - that my application did not give the browser the headers it needs (and maybe nothing at all), but the odd thing is that this does not happen all the time. It actually usually happens the first few times I go to my website after a deploy. Could this be a memory issue? Does anyone know how to trouble shoot this? My apache log isn't really telling me anything. I am running a ruby site using the rails framework on ubuntu hardy. thank you!

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• How does syslog-ng handles flush_lines(0) ?

  - by Luke404

  I wanted to make sure my syslog-ng was doing async logging. Reading through the documentation I see the flush_lines() option for file() destinations, if unspecified, will use the global default. Then I see that the global setting defaults to 0 but it doesn't explain what that means. Is it going to do synchronous logging when set to 0? is it going to buffer an unlimited number of lines (flushing just every flush_timeout() number of seconds)? is it going to bite me?

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• Slash Notation IP - What is what?

  - by Nirmal

  We just signed up with a new ISP and we got a static IP from them. Our previous ISP just gave one IP and we were able to configure our web server using that. Now, we have got this new IP with a slash notation. This type is new to me. When I used the CIDR calculator, it gave me the following results: 202.184.7.52/30 IP: 202.184.7.52 Netmask: 255.255.255.252 Number of hosts: 2 Network address: 202.184.7.52 Broadcast address: 202.184.7.55 Can someone please help me by explaining what these are? I could not understand what the number of hosts means. Is that telling that I can use two different IP for DNS (A) records? Also, which one should I setup in my router? The network address or broadcast address? Thank you very much for any answer you may provide.

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• WD My Passport detected but not assigned a drive letter

  - by abel

  I have a WD My Passport external drive which used to work fine on my Win7 x64 box until recently. Since the past few days, windows would not detect my external drive. However, Storage under disk management lists my external drive(which means windows can see my drive) but without a drive letter. I am not able to assign a drive letter(the option is grayed out). I installed EASUS Partition Manager which allows me to assign a drive letter, but fails to do so when I apply to save changes. What do i do to assign a drive letter to the drive or make windows to detect it as of old? The external drive works well on Win7 x32(dual boot, same system) and win7 x64 on another box. Update: cant comment from Opera Mini 6 @zeke the drive works absolutely fine on other Win7 boxes and on the dual boot win7 on the same system.

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• Asterisk: Forcing a sip peer to connect via ipv6?

  - by growse

  I've got an asterisk server that connects to an upstream provider over a WAN. The upstream provider supports both IPv4 and IPv6 connectivity, and the asterisk server is behind a NAT. When asterisk connects to the upstream sip peer via IPv6, everything works perfectly. The issue I have is that when I configure the asterisk server IPv6 address via DHCPv6, a race condition means that asterisk sometimes ends up attempting to contact the upstream peer via IPv4 (the SIP DNS name has both A and AAAA records). This is because asterisk starts up before the system has a valid IPv6 address. The connection does not work via IPv4 because of the NAT. Is there a way of configuring the peer to specify that it should only be contactable over IPv6? I guess it might be possible to hack together a firewall rule to deny all IPv4 traffic to that IP, but it'd be easier to configure this within asterisk itself.

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• Hosting multiple sites on a single webapp in tomcat

  - by satish

  Scenario: I have a website - www.mydomain.com. Registered users will be given the choice of getting a permanent url to their account on mydomain.com as a subdomain like (username.mydomain.com) or they can opt to have their own domain like www.userdomain.com. So the user can access his/her account through the subdomain URL or their own hostname and the request should be forwarded to a specific url on mydomain.com. For example: xyz.mydomain.com or www.xyz.com should give the user account from www.mydomain.com/webapp/account?id=xyz. The user should be completely unaware about where the content is coming from. Setup: My website is running as a webapp in tomcat 5.5.28 with apache as the web server. I am using a VPS which means I have control over all the configuration files (apache, tomcat and dns server). Can you tell me what are the configurations needed to achieve the above scenario??

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• How to add a 'second elbow' to an 'elbow arrow connector' in Powerpoint 2007?

  - by ricebowl

  I'm trying to put together a relatively complex flow-chart thing -as part of a University assignment (health-related, and gosh, does my university love all things Microsoft Office...). Because of the way the chart progresses I have to connect two objects with a 'double elbow' version of the 'elbow arrow connector.' I accept that perhaps this complexity means I should redesign the chart, but I've tried and failed to simplify things already. If you'll pardon my ASCII art, this is what I have: +----------------+ | 1 | | | +-------+--------+ | | +-------+--------+ /\ |2 +--------|-----/ 3\ +----------------+ \ / \/ Shape 1 should connect to shape 3, currently the line doing so passes behind shape 2. The diagram below shows what I'd prefer, and, frankly, what I need to happen. +----------------+ | 1 | | | +-------+--------+ | +-----------+ +----------------+ | /\ |2 | +--/ 3\ +----------------+ \ / \/ Having explored the various right-click options I'm either being blind and not seeing it, or...well, I'm hoping it's just me being blind and/or stupid, frankly. If anyone has any suggestions they'd be gratefully received. I'm working with WinXP and Office 2007 (at the university, I run on Ubuntu at home, which possibly explains why I'm missing something potentially simple)...

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• ICMP Data Field Modified - What does it Mean?

  - by Lucretius

  Normal ICMP Data fields are composed of a pretty standard 32 byte string of alphabet characters. abcdefghijklmnopqrstuvwabcdefghi I have captured a series of ICMP echo requests using WireShark with a modified Data field and I have no idea what it means. (Underscores represent spaces.) abcdefghijklmnopprstuvwxyzabcdefghi abcdefghijklmnoparstuvwxyzabcdefghi __abcdefghijklmnopsrstuvwxyzabcdefghi __abcdefghijklmnopsrstuvwxyzabcdefghi __abcdefghijklmnopwrstuvwxyzabcdefghi __abcdefghijklmnopdrstuvwxyzabcdefghi__ Note: The position of the "q" character The addition of "xyz" The addition of spaces before and after the payload When you look at the position of "q" horizontally it spells "passwd" which is a Linux/Unix command for changing a users password. Any ideas?

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• Linux and ClickPads

  - by John

  I just got my Arch / Windows 7 dual-boot setup running... except for one thing. I have an HP dv6-3127dx laptop, which is an issue when it comes to Linux because it does not have a traditional touchpad, but a "ClickPad." This means where the left and right buttons exist, it is also sensitive to moving the pointer. The issue comes in when I try to steady the mouse with one finger, while clicking the left click with another, because the mouse freaks out. It's also an issue because it's not recognizing the right click whatsoever. I am currently using the default Synaptics drivers downloaded from pacman on Arch Linux, running Linux v2.6.36. EDIT: The question of course is, how can I fix this?

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• Why does my SQL Server use AWE memory? and why is this not visible in RAMMap?

  - by Marnix Klooster

  We have a Windows Server 2008 R2 (64-bit) 8GB server where, according to Sysinternals RAMMap, 2GB of memory is allocated using AWE. As far as I understood, this means that these pages stay in physical memory and are never pushed out. This causes other apps to be pushed out of physical memory. In RAMMap, on the Physical Pages tab, the Process column is empty for all of the AWE pages. We run SQL Server on that box, but (through SQL Server Management Studio, under Server Properties - Memory, under Server memory options) it says is configured not to use AWE. However, when stopping SQL Server, the AWE pages are suddenly gone. So it really is the culprit. So I have three questions: Why does RAMMap not know/show that a SQL Server process is responsible for that AWE memory? Why does SQL Server Management Studio say that AWE memory is not used? How do we make configure SQL Server to really not use AWE memory?

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• SQL Server: Is it possible to prevent SQL Agent from failing a step on error?

  - by franklinkj

  I have a stored procedure that runs custom backups for around 60 SQL servers (mixes 2000 through 2008R2). Occasionally, due to issues outside of my control (backup device inaccessible, network error, etc.) an individual backup on one or two databases will fail. This causes this entire step to fail, which means any subsequent backup commands are not executed and half of the databases on a given server may not be backed up. On the 2005+ boxes I am using TRY/CATCH blocks to manage these problems and continue backing up the remaining databases. On a 2000 server however, for example, I have no way to prevent this error from failing the entire step: Msg 3201, Level 16, State 1, Line 1 Cannot open backup device 'db-diff(\PATH\DB-DIFF-03-16-2010.DIF)'. Operating system error 5(Access is denied.). Msg 3013, Level 16, State 1, Line 1 BACKUP DATABASE is terminating abnormally. I am simply asking if anything like this is possible in SQL 2000 or if I need to go in a completely different direction.

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• Full disk encryption on linux (ubuntu) w/o re-installing - possible?

  - by sa125

  Hi - I work at a company that takes security very seriously (like most). Our IT guy came in today to prepare us mentally to re-install our systems after he'll apply the new encryption policy (which will basically scrape our HD clean). For our team this means about a week of re-configuring, installing, and tweaking our desktops until we are back to work capacity - anyone who has to re-install a development machine probably knows what I'm talking about. So, I guess my question is if there's any way to perform full disk encryption on a linux (ubuntu = 9.04) system without having to re-install EVERYTHING [sigh]. IT guy said there isn't any - please prove him wrong. thanks :)

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• Windows unrecoverable error wouldn't come out of Hibernate

  - by JohnB

  Out of curiosity... I was in a rush: I put my laptop into Hibernate (I don't keep a battery in it btw) Leaned it against a box in the laundry room Smooth tile floor means bottom of laptop slide out and laptop feel flat against floor, not super hard, but it wasn't carpeting so.. Next time I booted my laptop, I received this error for the first time ever: (not an exact quote) Windows experienced an unrecoverable error and cannot come out of Hibernate. Windows is restarting now After that, my laptop seemed to operate flawlessly. What do you think happened? Jared the electronics? I'm guessing an error like this would result of some sort of hard drive trauma, but fortunately, I have discovered none so far. I scheduled Error-checking for next restart.

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• What is the best file system and allocation size for a USB flash drive?

  - by e-t172

  I'm considering using my 4 GB Kingston DataTraveler USB stick to store my Firefox and Thunderbird profiles for my laptop and desktop PCs. I want to maximize performance when using Firefox. The question is: what is the best file system and allocation size for the fastest Firefox profile operation on a USB flash drive? I'm using Windows 7 on both machines and I don't care about compatibility or the drive's lifetime. I just want to maximize performance. I could even use ext2 with the Ext2 IFS driver if that means it'll be faster. I'm assuming (perhaps I'm wrong) that putting a Firefox profile on a USB stick would be a "lots of small files" usage. In that case, it seems that NTFS would perform best, but I'm not sure. Besides I found nothing regarding the best allocation size to use. Considering that the default allocation size is designed for hard drives (which have different characteristics), I'm assuming that the default allocation size is not the best.

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• Application base [my path to install here] for host [hostnamehere] does not exist or is not a directory

  - by Hyposaurus

  I am trying to start a new installation of tomcat7 (on arch Linux). I have everything configured how I normally would but I am running into the problem described in the title. This means that tomcat starts but nothing in that host gets deployed. My server and host file: <Host name="localcity" appBase="/home/gary/Sites/localcity/" autoDeploy="true" unpackWARs="false"> </Host> And the directory it is in drwxrwxr-x 4 doug tomcat 4096 Apr 15 11:52 . drwx------ 33 gary users 4096 Apr 15 20:40 .. drwxrwxr-x 2 tomcat tomcat 4096 Apr 15 20:40 localcity drwx------ 2 gary users 4096 Mar 31 10:10 lod It looks like other installations I have, but I am not sure what the problem is.

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• What is the purpose of Templates in iWork Pages

  - by AntonAL

  As we launch Pages 09, it prompts us to choose the item from "Text processing" and "Templates". What is the purpose of "Templates" ? Actually, i expect from template the definition of document styles and common layout. Also, i expect to create the normal document from Template. But, i didn't noticed all of that, while working with iWork Pages 09. All, what i can do - is just to create the template ... and what next to do with it ? I don't understand the logical continuation of the workflow, means by Pages, when we have to deal with templates ...

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