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• Extremely slow startup of tomcat

  - by Henrik

  I have a tomcat 7 installation on a Solaris 10 server. My problem is that starting the server (or deploying a new war) is extremely slow. It usually take 30 - 60 minutes. The war application is a medium sized grails application so there are quite a a lot of files. The server is running other server applications as well but from my basic skills I don't see this as a problem. Can anyone give me some tips on how to analyse this? Settings in Tomcat, java, server, disc access or something else? I use these parameters to tomcat: CATALINA_OPTS="-Dcom.sun.management.jmxremote=true -Djava.awt.headless=true -Dfile.encoding=UTF-8 -server -Xms1536m -Xmx1536m -XX:NewSize=256m -XX:MaxNewSize=256m -XX:PermSize=512m -XX:MaxPermSize=512m -XX:+DisableExplicitGC" And I use a 32 bit java 1.6.

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• Should I build a multi-threaded system that handles events from a game and sorts them, independently, into different threads based on priority?

  - by JonathonG

  Can I build a multi-threaded system that handles events from a game and sorts them, independently, into different threads based on priority, and is it a good idea? Here's more info: I am about to begin work on porting a mid-sized game from Flash/AS3 to Java so that I can continue development with multi-threading capabilities. Here's a small bit of background about the game: The game contains numerous asynchronous activities, such as "world updating" (the game environment is constantly changing based on a set of natural laws and forces), procedural generation of terrain, NPCs, quests, items, etc., and on top of that, the effects of all of the player's interactions with his environment are programmatically calculated in real time, based on a set of constantly changing "stats" and once again, natural laws and forces. All of these things going on at once, in an asynchronous manner, seem to lend themselves to multi-threading very well. My question is: Can I build some kind of central engine that handles the "stacking" of all of these events as they are triggered, and dynamically sorts them out amongst the available threads, and would it be a good idea? As an example: Essentially, every time something happens (IE, a magic missile being generated by a spell, or a bunch of plants need to grow to their next stage), instead of just processing that task right then and adding the new object(s) to a list of managed objects, send a reference to that event to a core "event handler" that throws it into a stack of all other currently queued events, which then sorts them out and orders them according to urgency, splits them between a number of available threads for as-fast-as-possible multithreaded execution.

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• Automatically keep your local git repos clean

  - by kerry

  Most developers using git are probably aware of a command ‘git gc’ that has to be run from time to time when you notice your git commands are running a little slow. This command cleans up your git repo and makes sure everything is nice and tidy. If you have not run this command lately, you will notice a huge performance increase in your git commands after running. It’s a bit annoying to have to run this command when you notice that your git performance is suffering. The command also takes a while if you have not run it recently. With this in mind, I decided to create a method to automatically run this command from time to time. So I decided to overload cd similar to how rvm does. All you have to do is paste the method in your .profile file and it will run the command every time you enter a directory with a git repo. You’ll notice a little pause when entering the directory, it’s not insufferable but if you would prefer, you can add an & to the end of the command to have it run in the background. I chose the pause over the pid output of the background command. Here it is in all it’s glory. View the code on Gist.

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• Oracle as a Service in the Cloud

  - by Jason Williamson

  This should really be a Tweet, but I guess I'm writing a bit more. In theme of data migration and legacy modernization, I am seeing more and more of a push to consolidate data sources, especially from non-oracle to oracle in an effort to save dollars. From a modernization perspective, this fits in quite well. We are able to migrate things like Terradata, Sybase and DB2 and put that all into an Oracle database and then provide that as a OaaS (Oracle as a Service) Cloud offering. This seems to be a growing trend, and not unlike the cool RDS Amazon Database cloud being built on Oracle as well. We again find ourselves back in the similar theme of migration, however. The target technology sounds like a winner (COBOL to Java/SOA...DB2/Datacom/Adabas to Oracle) but the age-old problem of how to get there still persists. It it not trivial to migrate large amounts of pre-relational or "devolved" relational data. To do this, we again must revert back to a tight roadmap to migration and leverage the growing tools and services that we have. I'm working on a couple of new sections and chapters for a book that Tom and Prakash and I are writing around Database Migration and Consolidation. I'll share some snipits shortly.

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• How to get list of defined shortcut keys in the Start menu?

  - by Peter Mortensen

  How can I find out which keyboard shortcuts are defined inside the Start menu? And what shortcuts they are assigned to? Platform: Windows XP SP2 64 bit. Example: I open my main Visual Studio solution with a shortcut key, Ctrl+Alt+M. This is setup by having a shortcut inside the Start menu with: Target: "D:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\IDE\devenv.exe" D:\dproj\MSQall\MSQuant\MSQuant.sln Shortcut key: Ctrl+ALT+M If a new shortcut is added and its shortcut key is also set to Ctrl+Alt+M then there are now two shortcuts with the same shortcut key (conflict). To prevent this it would be nice to know which shortcut keys are already assigned and to which shortcuts.

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• Problem with installing Nvidia display drivers on Ubuntu 13.10

  - by Pascal

  Hello everyone and thank you for taking a look at this topic! I'm currently trying out Ubuntu 13.10 but I keep hitting a wall when it comes to installing a driver. I've tried: sudo apt-get install nvidia-current This resulted in a un-bootable system. The screen just stayed black and the cursor displayed as an 'X'. After that I did had to re-install Ubuntu. The computer I'm using is an Acer-Aspire-V3 with a build in Nvidia geforce GT 630M and also with a Intel HD graphics chip-set (not sure if chip-set is the right word here). "lspci | grep VGA" output: pascal@pascal-Aspire-V3-571G:~$ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) 01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [GeForce GT 630M] (rev a1) I've searched a bit here and there and found out that it would be wise to mention that this laptop is using (or so I think) Nvidia Optimus, not sure if it will add anything to the subject but at least I'll mention it just to be sure. Now to the questions: Q1 How is this caused and how can I fix it? Q2 What additional information could I provide to help you help me?

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• Query a Log4Net-database

  - by pinhack

  So if you use Log4Net to log into a database (i.e. using the AdoNetAppender), how can you conveniently get an overview of what has happend ? Well, you could try the following Query ( T-SQL ):   SELECT convert(varchar(10),LogDB.Date,121) as Datum, LogDB.Level, LogDB.Logger,COUNT(LogDB.Logger) as Counter From Log4Net.dbo.Log as LogDB  where Level <> 'DEBUG' AND convert(varchar(10),LogDB.Date,121) like '2010-03-25' GROUP BY convert(varchar(10),LogDB.Date,121),LogDB.Level,LogDB.Logger ORDER BY counter desc This query will give you the number of events by the Logger at a specified date - and it's easy to customize, just adjust the Date and the Level to your needs. You need a bit more information than that? How about this query:  Select  convert(varchar(10),LogDB.Date,121) as Datum,LogDB.Level,LogDB.Message,LogDB.Logger ,count(LogDB.Message) as counter From Log4Net.dbo.Log as LogDB where Level <> 'DEBUG' AND convert(varchar(10),LogDB.Date,121) like '2010-03-25' GROUP BY convert(varchar(10),LogDB.Date,121),LogDB.Level,LogDB.Message,LogDB.Logger ORDER BY counter desc Similar to the first one, but inclusive the Message - which will return a much larger resultset.

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• Thinkpad W510 with default graphics drivers shows weird brightness issues

  - by Chantz

  Hey guys, I am currently running 10.10 - 32 bit on a new Thinkpad W510 with nVidia Quadro FX 880M graphics card. I am running with the default graphics drivers that installed with ubuntu install. My problem is that when I am logging in the screen acts normally as far as birghtness is concerned. I can increase/decrease brightness with Fn keys. But few seconds after I log in screen goes pitch dark. Hitting Fn+Home flickers the screen to all the way bright, then all the way dark. This behavior continues until I reach maximum brightness, in which case the screen stays all the way bright, for a few more seconds and then again goes dark if there is no activity & the cycle continues. Have you guys faced any of these issues? If so any pointers on how to resolve it. I am not alone, on ubuntu forum I saw another person having the same issue - link but no solution. Please help! UPDATE I followed the instructions that htorque mentions in his answer and it worked.

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• Ideas to tackle unwanted bad press/review on Google's SERP?

  - by Rob

  After Googling our company name to our horror we've found someone on Yelp.co.uk has reviewed our company. On the SERP your eye is immediately drawn to the 2 star review some complete stranger has written, which to be honest is pure slander! The most infuriating thing is the person who reviewed our company has never even been a client/customer. It's a bit like me reviewing a restaurant having never eaten or even been in there! We've sent her a private message on Yelp to remove the review and also sent a complaint to Yelp themselves but have yet to get a reply. We've resisted going mad at the reviewer and also requested that she re-review us having just relaunched our new website (it still riles us that she's not even a client though!). We've had genuine customers/clients review us on Yelp yet this 2 star review remains on Google's SERP. Roughly how long would it take to for our new reviews to over take this review? Does anyone have any suggestions as to how we can push the review off the 1st page of Google's SERP or any creative ways in which we can tackle this issue?

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• Video on Hyperion Tax Provision

  - by Lia Nowodworska - Oracle

  ( in via Jan) EPM Information Development has asked us to remind you about the new video available for Hyperion Tax Provision. You can view it on the OracleEPMWebcasts YouTube channel here: http://bit.ly/1jxLlCy An information rich 4:40 minutes of your time.  So please take a look. The video gives a brief overview of the main features of  Hyperion Tax Provision. You will learn ... That Tax Provision and reporting System builds on the Hyperion Financial Close Reporting Platform That much of the Tax Provision flow process is similar to the Financial Close Process and that the modules have been aligned to work together very closely. That HTP enables you to integrate Book- and Tax Reporting on a common platform. That It uses the technology of HFM, ties in with SmartView and can be used with Hyperion Financial Reporting. That the native integration between the Financial System and the Tax System creates transparency for the Tax Departments and removes bottlenecks in the tax process. More technical information can be found here: Oracle Hyperion Tax Provision Data Sheet Oracle Hyperion Tax Provision White Paper Oracle Hyperion Tax Provision Documentation If you have another 45 minutes to spare and want to get into greater detail, then you can check out the recording of an Advisor Webcast that we did earlier last year: You can find this via KM Doc Oracle Business Analytics Advisor Webcast Schedule and Archive Recordings (Doc ID 1456233.1) -> Select the Tab "Archived 2013" and it is the third from the top: "Oracle Hyperion Tax Provision - Features and Overview with Demo" If you have questions towards that Advisor Webcast, you may participate in the Community Discussion about it. (layout and post: Torben, authorized: Lia)

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• Strange stuff in apache log

  - by aL3xa

  Hi lads, I'm building some kind of webapp, and currently the whole thing runs on my machine. I was combing down my logs, and found several "strange" log entries that made me a bit paranoid. Here goes: ***.***.***.** - - [19/Dec/2010:19:47:47 +0100] "\x99\x91g\xca\xa8" 501 1054 **.***.***.** - - [19/Dec/2010:20:14:58 +0100] "<}\xdbe\x86E\x18\xe7\x8b" 501 1054 **.**.***.*** - - [21/Dec/2010:15:28:14 +0100] "J\xaa\x9f\xa3\xdd\x9c\x81\\\xbd\xb3\xbe\xf7\xa6A\x92g'\x039\x97\xac,vC\x8d\x12\xec\x80\x06\x10\x8e\xab7e\xa9\x98\x10\xa7" 501 1054 Bloody hell... what is this?!

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• What is the correct root file to import to aptana from an xampp folder/existing web app or git repository?

  - by gaff

  Very noob question - all of this is new to me - not really sure how to get started. Overview: I'm taking over an existing wep project that has been developed in aptana and deployed in xampp setup - I also have access to Git repository on local directory. I want to import the web application into aptana, run it and begin updating/editing - bit of steep learning curve for me What is the best way to import? And what should I import? What should it look like in aptanan? I tried importing what I think is the root file from the git folder ("existing folder as new project")- it contains things like css, doc, img and js. This looks right to me - but might not be. Thanks, Gaff

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• Filtering serial port io

  - by mr odus

  I am currently working on a project where I communicate with hardware via a com port on its respective pc(win xp or 7) It is a fairly large project and sifting through the log file can be a bit of pain. This is my current setup. I use putty to do the actual serial communication, and write it to a log file. Then using MinGW Msys I filter it using tail -f "puttyLog" | grep -i "search term" Is there a better way to do this? I mean specifically filtering the input in realtime. Not that mine is terrible, but it still involves having to read from a log and sometimes there have been hangups where it will be delayed for a minute or 2. I have used software in the past with a main io window and then internal filter panels, but can no longer remember or find it.

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• mod_rewrite directory path to deeper directory

  - by DA.

  I don't usually work with LAMP and am a bit stumped getting a site working locally. The site is set up to be used via localhost: 1) http://localhost/mysite However, the way the site files are physically on the server the root is located as such: 2) /var/www/mysite/trunk/site I'm trying to figure out a way where I could type #1 but have apache actually looking for the files in #2 so that all of the asset/page links in the web application work. Is mod_rewrite the solution? If so, I'm stumped on the syntax. I have this but it won't work (due, I assume, to it causing an infinite loop) RewriteRule ^mysite/ mysite/trunk/site I have a hunch I need to sprinkle on some regex?

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• ZSH - output whole history?

  - by GorillaSandwich

  I recently switched from bash to zsh. In bash one way (besides recursive search) that I used to find previously-run commands was history | grep whatever, where whatever is the bit of command I remember. In zsh, this isn't working. history returns only a few items, even though my .zsh_history file contains many entries, which I have configured it to do. How can I output my whole history, suitable for searching with grep? (Note: I started out using ryanb's dotfiles, so perhaps it's a problem with his default settings?)

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• Cannot Boot, How to recover

  - by Kendor

  Am running 11.10 64-bit with Gnome-shell. Something happened late Friday whereby my machine never gets to the login screen. I do get to an Ubuntu splash logo, after that I get a text screen that it hangs on. The screen is referring to issues with mounting various network resources, including VMWare and also some references to my NAS that are in fstab. If I hit "esc" I can get to the GRUB menu and into recovery console. If I try to do a file system check, I run into a similar error screen that I see when trying to boot normally. A possible clue here is that during my last good session I made some mods to the /etc/hosts file to reference another system which I'm connecting to with Synergy. I don't believe I have hardware issues as I'm able to boot properly with a Live USB and connect to my network/Internet. A few more tidbits. I have regular Dejadups backups on my NAS. I have a good Clonezilla whole drive image which is 4-6 weeks old.. My home is encrypted. I thought I'd try blowing away my hosts file via live USB, but when I mounted the hard drive everything was read-only and I couldn't figure out how to replace it. P.S. I logged in via CLI and modded the host file to remove the entry I'd made, to no avail. System continue to gets stuck on the following: CIFS VFS: default security mechanism requested. The default security mechanism will be upgraded from ntlm to ntlmv2 in kernel version 3.1s Would love some sober advice on how to attack this.

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• Don't miss Virtual Developer Day - All about ADF next week

  - by Shay Shmeltzer

  In case you haven't heard we are holding a free online virtual developer day next week - July 10th that you should attend - even if you think you already know ADF. First the registration link - http://bit.ly/fusiondev. While one of the tracks is aimed at developer who are relatively new to ADF - and cover ADF Faces, ADF Controller and a comparison of productivity with Forms and other tools - the two other tracks have great content on some topics that you might not be familiar with even if you already work with ADF. This include sessions about the upcoming ADF Mobile, The new ADF support in Eclipse and information about Application Life Cycle Management with ADF and JDeveloper. As well as sessions that will open your mind to the areas where ADF integrates with other Fusion Middleware Solutions such as ADF integration with BI, WebCenter and SOA. Most of the sessions are quite heavy on demos and you'll get a chance to interact with the presenters and ask questions during the live event. You should register even if you can't attend the live event - this way you'll get an email pointing you to the recorded sessions for on demand viewing. See you next week.

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• Windows Physical Direct Memory Mapping

  - by chrisjleaf

  I'm a bit disappointed there is almost no discussion of this no matter where I look so I guess I'll have to ask. I'm writing a cross platform memory bench marking application which requires direct physical address mapping rather than virtual addressing. EDIT The solution would look something like the Linux/Unix system calls: int fd = open("/dev/mem", O_RDONLY); mmap(NULL, len, PROT_READ, MAP_SHARED, fd, PHYSICAL_ADDRESS_OFFSET); which will require the kernel to either give you a virtual page mapping to the desired physical address or return that it failed. This does require supervisor privileges but that is ok. I have seen a lot of information about shared memory and memory mapped files but all of these reside on disc and are thus not really useful when I'm trying to make a system dependent read. It is very similar to writing an IO driver although I do no need write permissions to the physical address. This site gives an example of how to do it on a driver level using the Windows Driver Kit: NT Insider: Sharing Memory between drivers and applications This solution would probably require Visual Studio which currently I do not have access to. (I have downloaded the WDK api but it complained about my use of GCC for Windows). I'm traditionally a Linux programmer so I'm hoping there might be something really simple I'm missing. Thanks in advance if you know something I don't!

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• More than one way to skin an Audit

  - by BuckWoody

  I get asked quite a bit about auditing in SQL Server. By "audit", people mean everything from tracking logins to finding out exactly who ran a particular SELECT statement. In the really early versions of SQL Server, we didn't have a great story for very granular audits, so lots of workarounds were suggested. As time progressed, more and more audit capabilities were added to the product, and in typical database platform fashion, as we added a feature we didn't often take the others away. So now, instead of not having an option to audit actions by users, you might face the opposite problem - too many ways to audit! You can read more about the options you have for tracking users here: http://msdn.microsoft.com/en-us/library/cc280526(v=SQL.100).aspx  In SQL Server 2008, we introduced SQL Server Audit, which uses Extended Events to really get a simple way to implement high-level or granular auditing. You can read more about that here: http://msdn.microsoft.com/en-us/library/dd392015.aspx  As with any feature, you should understand what your needs are first. Auditing isn't "free" in the performance sense, so you need to make sure you're only auditing what you need to. Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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• Why is MySQL making the CPU run at about 80%?

  - by Robert

  MySQL is eating up about 80% of my CPU for no reason as far as I can see. Right now this server is rarely used, more of a test site I set up that will eventually be a used for production once I fix small problems like this. I run 3 instances of MySQL but it seems that my first instance is taking up all the CPU. When I turn off the first instance and leave the other two on everything runs fine. Any suggestions? I tried Show Processlist and no statements are being run besides "Sleep" and the query "Show Processlist" (obviously) at the time it's using up all this CPU. my.cnf is basic. I did not optimize or change any MySQL settings. Do you think this would cause such strange behavior? The machine is running Linux Centos 5.7 64 bit and MySQL 5.0.95. Thanks

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• Strange Exchange 2010 Mailbox issues

  - by jmreicha

  A little bit of information on my environment. I have 2 Exchange 2010 mailbox servers setup in a DAG, connected to a VNX SAN via fiber for the mailbox database disks. One of the servers seems to be working fine as it isn't throwing any similar errors but the other has been receiving strange errors in Event Viewer. I haven't been able to find a pattern to when these happen and I'm not really sure what I should be looking at to troubleshoot this. At this point I am wondering if the issue resides on the SAN or if this is because of an improper shutdown or something else on the Exchange side of things? Here are a few of the errors if that helps:

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• create a bootable usb to automatic repair windows xp system32 files

  - by Edo Post

  Is it possible to create a script/live distro that replaces some system32 files? To explain it a bit more in details: There is a company that has multiple computers (think in 100/1000's) and they all are missing the same system32 files since the company's software removed it. The systems are distributed all over the world and are managed by "normal" people who don't have any knowledge about computers. I want to create a usb stick that i can mail to all those people which contains a script that executes when you boot the usb. this script should replace the missing system32 files without any user input is this possible, and if so how could i manage this?

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• How to control an actor movement in UDK

  - by Mikalichov

  This might be very basic, but I couldn't find something relevant to what I need (see below). I am working on a very basic thing: a 3D environment with some buildings, and actors walking inside it. It looks like following: I mainly want to manage to have one actor standing around, idling, and another walking around the area. Right now, this is done through matinee + skeletal mesh groups, and forcing a looped animation on the actors: But I realize this is super caveman-level. So I've build an AnimTree, linking the idling and directional animations to the corresponding nodes. But then, I'm stuck. I added the AnimTree in the actors properties, but nothing happens. I've tried MoveToActor, but no success - is there a thing to set to allow an actor to move? Also, I place the actors on the map manually (they are supposed to be unique), should I spawn them instead? Every tutorial I find explains how to use an AnimTree for the player character, which is not what I want. I need a way to move the actors. I tried to look for AI tutorials, but only found UT3 bots-modifications, which is not what I need either. Since I have so much trouble finding how to do this through Kismet, I'm starting to suspect this has to be done through scripting/coding, but I would like to be sure there is no way to do it through Kismet before going that route. Every bit of answer about how to tell an actor something along the lines of "go in that direction as much as you can, then when you hit a wall turn 45° and continue" would be awesome. I'll be happy to move/edit the question if there is any problem with it

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• where to start and lack of motivation

  - by anoguy

  I have a few questions that have been bothering me for quite a while, maybe you guys can give me some tips. So let me give a very brief explanation about what I am doing at the moment (like someone cares lol). At the moment I am a last year student on computer science. And like most of you already know is that you won't learn deep programming there, you need to learn it yourself. So at the moment I know like the basics of c++, java, html, php. But it's all bits of this and bits of that. I seriously want to dive deeper in the programming world but there are so many programming languages on the web and there is so much information that i don't know where to start any more.. And that's not the biggest issue, I also lost a bit of my motivation for programming and I like to get more motivation for it so that I love what I do (I am also a very lazy person btw, that's also a problem playing here). So can you guys give me some tips for helping me, because I really want to get pumped up and make cool stuff. (sry for my bad english XD)

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• Is it possible to procure venture capital based on in-progress ideas? [migrated]

  - by Clay Shannon

  I hope this is not the wrong forum for this question, but I can't find one in the Stack Exchange "family" that would be more appropriate. I have ideas for two web sites which I think will be quite popular (they are totally unrelated to each other). I am a programmer, and a "creative" (photographer, author, musician). So I have the "vision" as well as the technical know-how to bring these websites into being. My "problem" is that I'm champing at the bit to complete them, and don't have much time to work on them (being employed fulltime, etc.) If I continue to work on them in my so-called spare time, it will probably be a year or more before they are both done. If I was in a position to work on them fulltime (IOW, if I had a "silent partner" willing to invest enough money that I could quit my job), I could have them complete in about three months. I would be willing to partner with somebody or some group who would back me financially in this way. My vision/work combined with their monetary investment could bring about "great things" or at least moderately great things. I know you can "crowd fund" startups and so on, but for that you need to expose your idea. My ideas are not something I would want to make public, as somebody might "steal" them. I'm willing to discuss them with serious individual potential investors, though (provided they were willing to sign a non-disclosure agreement). Does anybody have any recommendation on how I might find a suitable partner[s] for this/these ventures?

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