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  • Notification of low DHCP pool in split scope setup

    - by JJBladester
    In Windows Server 2008 R2, it is possible to read the Event Viewer for EventID 1020 which is an indication that the DHCP pool is running low on addresses. What if I have two DHCP servers in my domain that use an 80/20 split scope to take a /24 pool of DHCP-allocated IP addresses and split it amongst the two servers according to this Technet Article? In this case, since the scope is split, how can I tell if the total DHCP pool, which is split amongst the two DHCP servers, is beginning to run low on address space?

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  • App pool gets stuck on reset and takes .net pages out

    - by delenda
    Several times after our app pool has been told to reset, it gets stuck, the .net pages go down and the following error appears in the application event log: Failed to execute request because the App-Domain could not be created. Error: 0x80070057 The parameter is incorrect. Our app pool is scheduled to automatically reset at 4am, so the errors stay up until we manually restart the app pool. Has anyone else encountered the error or know of any solutions? Research has suggested it's a permissions issue, but the permissions don't change and the error happens infrequently. The site has no other permission based problems and the app pool identity has permission where needed.

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  • Creating Multiple Users on Single PHP-FPM Pool

    - by Vince Kronlein
    Have PHP-FPM/FastCGI up and running on my cPanel/WHM server but I'd like have it allow for multiple users off of a single pool. Getting all vhosts to run off a single pool is simple by adding this to the Apache include editor under Global Post Vhost: <IfModule mod_fastcgi.c> FastCGIExternalServer /usr/local/sbin/php-fpm -host 127.0.0.1:9000 AddHandler php-fastcgi .php Action php-fastcgi /usr/local/sbin/php-fpm.fcgi ScriptAlias /usr/local/spin/php-fpm.fcgi /usr/local/sbin/php-fpm <Directory /usr/local/sbin> Options ExecCGI FollowSymLinks SetHandler fastcgi-script Order allow,deny Allow from all </Directory> </IfModule> But I'd like to find a way to implement php running under the user, but sharing the pool. I manage and control all the domains that run under the pool so I'm not concerned about security of files per account, I just need to make sure all scripting can be executed by the user who owns the files, instead of needing to change file permissions for each account, or having to create tons of vhost include files.

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  • PHP-FPM Pool, Child Processes and Memory Consumption

    - by Jhilke Dai
    In my PHP-FPM configuration I have 3 Pools, the eg: Config is: ;;;;;;;;;;;;;;;;;;;;;;; ; Pool 1 ; ;;;;;;;;;;;;;;;;;;;;;;; [www1] user = www group = www listen = /tmp/php-fpm1.sock; listen.backlog = -1 listen.owner = www listen.group = www listen.mode = 0666 pm = dynamic pm.max_children = 40 pm.start_servers = 6 pm.min_spare_servers = 6 pm.max_spare_servers = 12 pm.max_requests = 250 slowlog = /var/log/php/$pool.log.slow request_slowlog_timeout = 5s request_terminate_timeout = 120s rlimit_files = 131072 ;;;;;;;;;;;;;;;;;;;;;;; ; Pool 2 ; ;;;;;;;;;;;;;;;;;;;;;;; [www2] user = www group = www listen = /tmp/php-fpm2.sock; listen.backlog = -1 listen.owner = www listen.group = www listen.mode = 0666 pm = dynamic pm.max_children = 40 pm.start_servers = 6 pm.min_spare_servers = 6 pm.max_spare_servers = 12 pm.max_requests = 250 slowlog = /var/log/php/$pool.log.slow request_slowlog_timeout = 5s request_terminate_timeout = 120s rlimit_files = 131072 ;;;;;;;;;;;;;;;;;;;;;;; ; Pool 3 ; ;;;;;;;;;;;;;;;;;;;;;;; [www3] user = www group = www listen = /tmp/php-fpm3.sock; listen.backlog = -1 listen.owner = www listen.group = www listen.mode = 0666 pm = dynamic pm.max_children = 40 pm.start_servers = 6 pm.min_spare_servers = 6 pm.max_spare_servers = 12 pm.max_requests = 250 slowlog = /var/log/php/$pool.log.slow request_slowlog_timeout = 5s request_terminate_timeout = 120s rlimit_files = 131072 I calculated the pm.max_children processes according to some example calculations on the web like 40 x 40 Mb = 1600 Mb. I have separated 4 GB of RAM for PHP, now according to the calculations 40 Child Processes via one socket, and I have total of 3 sockets in my Nginx and FPM configuration. My doubt is about the amount of memory consumption by those child processes. I tried to create high load in the server via httperf hog and siege but I could not calculate the accurate memory usage by all the PHP processes (other processes like MySQL and Nginx were also running). And all the sockets were in use, So, I seek guidance from anyone who have done this before or know how exactly the pm.max_children in PHP Works. Since I have 3 Pools/sockets with 40 child processes does that count to 3 x 40 x 40 Mb of Memory usage ? or it is just like 40 Max. Child processes sharing 3 sockets (and the total memory usage is just 40 x 40 Mb) ?

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  • Thread safe GUI programming

    - by James
    I have been programming Java with swing for a couple of years now, and always accepted that GUI interactions had to happen on the Event Dispatch Thread. I recently started to use GTK+ for C applications and was unsurprised to find that GUI interactions had to be called on gtk_main. Similarly, I looked at SWT to see in what ways it was different to Swing and to see if it was worth using, and again found the UI thread idea, and I am sure that these 3 are not the only toolkits to use this model. I was wondering if there is a reason for this design i.e. what is the reason for keeping UI modifications isolated to a single thread. I can see why some modifications may cause issues (like modifying a list while it is being drawn), but I do not see why these concerns pass on to the user of the API. Is there a limit imposed by an operating system? Is there a good reason these concerns are not 'hidden' (i.e. some form of synchronization that is invisible to the user)? Is there any (even purely conceptual) way of creating a thread safe graphics library, or is such a thing actually impossible? I found this http://blogs.operationaldynamics.com/andrew/software/gnome-desktop/gtk-thread-awareness which seems to describe GTK differently to how I understood it (although my understanding was the same as many people's) How does this differ to other toolkits? Is it possible to implement this in Swing (as the EDT model does not actually prevent access from other threads, it just often leads to Exceptions)

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  • Logic / Render phases with a single thread

    - by DevilWithin
    The question I have may generate different opinions from different developers, but I'd still like to have an answer on this. Its all about the updating and rendering steps of the game loop, and their use under multi and single threaded environments. Currently, there is one thread running, which takes care of sequentially executing events , logic and rendering. Sometimes, the logic part may wish to change the game state to something else, and in between do some loading of files. The result is that the game hangs completely while loading, and then proceeds to normal rendering of the new state. To go around this, i could make another thread, do the loading there while the main thread renders a smooth loading animation, and then proceed normally. The real question is about if i don't create another thread. I could refresh the screen from the logic thread, and provide some basic loading screen, which could be not so smoothly updated while the files load. In fact, this approach is not loved by a lot of developers, as it scrambles render code in the logic step, which may cause problems of different sorts.. Hope its clear!

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  • How to do thread management in C++?

    - by Dipan Mehta
    We use pthread for thread management in C based systems. pthread is in general compilable by C++ compiler (like g++). However, what are the better ways of abstractions for threads in C++? Also, for making any system to be working in a multi-threaded system, it is also important to make thread safe. What are the standard libraries that requires alternative (installs) to be thread safe or are they unsafe for multi-threaded environments? Is smart pointers, templates require special measures to make it safe? What are the best practices for the thread managements in C++?

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  • Application Pool Identity corruption

    - by Gavin Osborn
    I have observed a few times while deploying software into IIS that every now and again the related Application Pools fail to restart and in the Event Log we see an error like the following: The identity of application pool, 'AppPoolName' is invalid. If it remains invalid when the first request for the application pool is processed, the application pool will be disabled. This does not happen frequently but when it does the only solution is to re-apply the Identity password in the IIS Manager Window. As soon as I re-apply and then restart the application pool the web sites come back up. Facts: The account is a service account whose password never expires. The account is local to the IIS host. The account password is never changed. This is IIS 6 running on Windows Server 2003 Deployment of the software is via MSI and involves several IIS Resets. The software is created in house and does not do anything fancy to IIS. Any ideas how the identity information might become corrupt? Edit: Clarification To be clear - this user account and password combination work absolutely fine and usually works fine as the Identity of the Application Pool. It is only when we deploy updates of our software into an existing IIS application that it stops working. Our password has not changed Our deployment does not change the password or reconfigure the application pools. This does not happen every time, 1/20 times perhaps. If we re-enter the password into IIS and restart the App Pools everything works.

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  • Can't remove zfs log device from pool

    - by netmano
    I run a FreeBSD 9.0 server with ZFS pool version 28 and ZFS version 5. I had two pools with a log on ssd's two partitions. These pools was created on FreeBSD 8.2 with ZFS pool version 15, and ZFS version 4. After I upgraded to the new zfs version, I tried to remove the SSD log device from both pools both command was successful (no error message). One of the pools was the log removed, but the other still there, I down the server removed the ssd physically, and hoped it will be forgot by the zpool. The zpool became degraded as ssd was missing. I tied to remove again. No error message, but the log device entry still there. After it, to became the pool online again, I created a file on the root UFS partition and replaced the missing to device to this file. It was successful, the pool again online. However I can't remove the log device from the pool. Where can I have to look for error messages? (in dmesg there is nothing about it, also the zfs remove doesn't have any error message, it's seem like it was successful.

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  • App pool gets stuck on reset and takes .net pages out

    - by user8042
    Several times after our app pool has been told to reset, it gets stuck, the .net pages go down and the following error appears in the application event log: Failed to execute request because the App-Domain could not be created. Error: 0x80070057 The parameter is incorrect. Our app pool is scheduled to automatically reset at 4am, so the errors stay up until we manually restart the app pool. Has anyone else encountered the error or know of any solutions? Research has suggested it's a permissions issue, but the permissions don't change and the error happens infrequently. The site has no other permission based problems and the app pool identity has permission where needed.

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  • file:///cdrom/pool/main/k/klibc/klibc-utils_1.5.25-1ubuntu2_amd64.deb was corrupt

    - by curlyreggie
    I guess this is trivial and most commonly asked question, but I'd reiterate it again here as I'm not able to find a correct solution. I'm trying to install Ubuntu Cloud setup on VMWare using the package from http://download.ubuntu.com and have this basic installation setup issue as per the below image. file:///cdrom/pool/main/k/klibc/klibc-utils_1.5.25-1ubuntu2_amd64.deb was corrupt The issue is I cannot continue by skipping this as you know this happens to be the most important setup. How can I fix this? Help is sincerely appreciated.

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  • IIS7.5 Domain Account Application Pool Identity for SQL Server Authentication

    - by user38652
    In Windows Server 2003/IIS6 land we typically create an app pool that runs as the identity of an AD account created with minimal privileges simply for that purpose. This same domain user would also be granted access to SQL Server so that any ASP.NET application in that app pool would be able to connect to SQL Server with Integrated Security=SSPI. We are making a brave move to the world of Windows Server 2008 R2/IIS7.5 and are looking to replicate this model, but I am struggling with how to make the application pool in IIS7.5 run as the identity of an AD account? I know this sounds simple and hopefully it is, but my attempts so far have been fruitless. Should the application pool identity be a 'Custom account' for a domain account? Does the domain account need to be added to any groups?

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  • Multithreaded game fails on SwapBuffers in render thread at exit

    - by user782220
    The render loop and windows message loop run on separate threads. The way the program exits is that after PostQuitMessage is called in WM_DESTROY the message loop thread signals the render loop thread to exit. As far as I can tell before the render loop thread can even process the signal it tries SwapBuffers and that fails. My question, is there something about how Windows processes WM_DESTROY and WM_QUIT, in maybe DefWindowProc that causes various objects associated with rendering to go away even though I haven't explicitly deleted anything? And that would explain why the rendering thread is making bad calls at exit?

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  • Can CultureInfo.CurrentCulture differ per application pool?

    - by Peter
    I'm having trouble with CultureInfo in our ASP.NET web application. Our web application returns a different culture, depending on which application pool it is in. In application pool A, it is en-US, but in application pool B, it's nl-BE. I'd like it to be nl-BE, but can't find where to change this (IIS6 by the way). I'm not even sure if this can be changed on an app-pool level. I'm checking with CultureInfo.CurrentCulture.Name. Is it possible to change this for an application pool? Or what else could influence this? In the regional settings of the server, we have selected 'Dutch (Belgium)', which translates to nl-BE, I believe. So where could this application pool be getting the en-US?

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  • What happens when Npgsql connection pool reaches Max

    - by ClearCarbon
    Both the name of the connection string parameter and this blog post - http://fxjr.blogspot.co.uk/2010/04/npgsql-connection-pool-explained.html - lead me to believe that Npgsql wont exceed the MaxPoolSize value set in the connection string. However the docs (http://npgsql.projects.postgresql.org/docs/manual/UserManual.html) say "Max size of connection pool. Pooled connections will be disposed of when returned to the pool if the pool contains more than this number of connections. Default: 20" This suggests that the pool can actually grow larger than MaxPoolSize and it is in fact just a level at which Npgsql starts to aggressively remove connections from the pool as soon as they are returned. I've been searching to try and find an answer but I can find out exactly what happens when you reach MaxPoolSize. Anyone else know? edit: I should add we are using Npgsql 2.0.6.0 due to another dependency being supported only up to that version.

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  • [C# Thread] I'd like access to a share on the network!

    - by JustLooking
    Some Details I am working with VisualWebGUI, so this app is like ASP.NET, and it is deployed on IIS 7 (for testing) For my 'Web Site', Anonymous Authentication is set to a specific user (DomainName\DomainUser). In my web.config, I have impersonation on. This is how I got my app to access the share in the first place. The Problem There is a point in the the app where we use the Thread class, something similar to: Thread myThread = new Thread(new ThreadStart(objInstance.PublicMethod)); myThread.Start(); What I have noticed is that I can write to my logs (text file on the share), everywhere throughout my code, except in the thread that I kicked off. I added some debugging output and what I see for users is: The thread that's kicked off: NT AUTHORITY\NETWORK SERVICE Everywhere else in my code: DomainName\DomainUser (described in my IIS setup) OK, for some reason the thread gets a different user (NETWORK SERVICE). Fine. But, my share (and the actual log file) was given 'Full Control' to the NETWORK SERVICE user (this share resides on a different server than the one that my app is running). If NETWORK SERVICE has rights to this folder, why do I get access denied? Or is there a way to have the thread I kick off have the same user as the process?

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  • Is this use of PreparedStatements in a Thread in JAVA correct?

    - by Gormcito
    I'm still an undergrad just working part time and so I'm always trying to be aware of better ways to do things. Recently I had to write a program for work where the main thread of the program would spawn "task" threads (for each db "task" record) which would perform some operations and then update the record to say that it has finished. Therefore I needed a database connection object and PreparedStatement objects in or available to the ThreadedTask objects. This is roughly what I ended up writing, is creating a PreparedStatement object per thread a waste? I thought static PreparedStatments could create race conditions... Thread A stmt.setInt(); Thread B stmt.setInt(); Thread A stmt.execute(); Thread B stmt.execute(); A´s version never gets execed.. Is this thread safe? Is creating and destroying PreparedStatement objects that are always the same not a huge waste? public class ThreadedTask implements runnable { private final PreparedStatement taskCompleteStmt; public ThreadedTask() { //... taskCompleteStmt = Main.db.prepareStatement(...); } public run() { //... taskCompleteStmt.executeUpdate(); } } public class Main { public static final db = DriverManager.getConnection(...); }

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  • Create a new app pool and assign it to a site subfolder on a remote host, using C# and IIS7

    - by Soeren
    I have a web site running on IIS7 on a remote server. I would like to do the following: Create a new subfolder under the root virtual directory. Create a new app pool. Add this new app pool to the new subfolder Normally, I would do this manually in IIS by first creating the app pool, and then right-clicking the sub folder an choose "add application", but I need to do this programmatically in C#. I've managed to make the above points 1 and 2 work, but I can't find the way to adding the application to the sub folder. This is the code I have used so far for 1 and 2: ServerManager mgr = new ServerManager(); ApplicationPool myAppPool = mgr.ApplicationPools.Add("MyAppPool"); myAppPool.AutoStart = true; myAppPool.Cpu.Action = ProcessorAction.KillW3wp; myAppPool.ManagedPipelineMode = ManagedPipelineMode.Integrated; myAppPool.ManagedRuntimeVersion = "V4.0"; myAppPool.ProcessModel.IdentityType = ProcessModelIdentityType.NetworkService; mgr.CommitChanges(); if (!Directory.Exists(@"D:\webroot\TestSite\NytSite")) { Directory.CreateDirectory(@"D:\webroot\TestSite\NytSite"); } So, I need to add "MyAppPool" to the "NytSite" folder... Is this even the correct way to do this? Any experiences out there? Thnx

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  • How to create a thread in XNA for pathfinding?

    - by Dan
    I am trying to create a separate thread for my enemy's A* pathfinder which will give me a list of points to get to the player. I have placed the thread in the update method of my enemy. However this seems to cause jittering in the game every-time the thread is called. I have tried calling just the method and this works fine. Is there any way I can sort this out so that I can have the pathfinder on its own thread? Do I need to remove the thread start from the update and start it in the constructor? Is there any way this can work? Here is the code at the moment: bool running = false; bool threadstarted; System.Threading.Thread thread; public void update() { if (running == false && threadstarted == false) { thread = new System.Threading.Thread(PathThread); //thread.Priority = System.Threading.ThreadPriority.Lowest; thread.IsBackground = true; thread.Start(startandendobj); //PathThread(startandendobj); threadstarted = true; } } public void PathThread(object Startandend) { object[] Startandendarray = (object[])Startandend; Point startpoint = (Point)Startandendarray[0]; Point endpoint = (Point)Startandendarray[1]; bool runnable = true; // Path find from 255, 255 to 0,0 on the map foreach(Tile tile in Map) { if(tile.Color == Color.Red) { if (tile.Position.Contains(endpoint)) { runnable = false; } } } if(runnable == true) { running = true; Pathfinder p = new Pathfinder(Map); pathway = p.FindPath(startpoint, endpoint); running = false; threadstarted = false; } }

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  • Create a thread in xna Update method to find path?

    - by Dan
    I am trying to create a separate thread for my enemy's A* pathfinder which will give me a list of points to get to the player. I have placed the thread in the update method of my enemy. However this seems to cause jittering in the game every-time the thread is called. I have tried calling just the method and this works fine. Is there any way I can sort this out so that I can have the pathfinder on its own thread? Do I need to remove the thread start from the update and start it in the constructor? Is there any way this can work. Here is the code at the moment: bool running = false; bool threadstarted; System.Threading.Thread thread; public void update() { if (running == false && threadstarted == false) { thread = new System.Threading.Thread(PathThread); //thread.Priority = System.Threading.ThreadPriority.Lowest; thread.IsBackground = true; thread.Start(startandendobj); //PathThread(startandendobj); threadstarted = true; } } public void PathThread(object Startandend) { object[] Startandendarray = (object[])Startandend; Point startpoint = (Point)Startandendarray[0]; Point endpoint = (Point)Startandendarray[1]; bool runnable = true; // Path find from 255, 255 to 0,0 on the map foreach(Tile tile in Map) { if(tile.Color == Color.Red) { if (tile.Position.Contains(endpoint)) { runnable = false; } } } if(runnable == true) { running = true; Pathfinder p = new Pathfinder(Map); pathway = p.FindPath(startpoint, endpoint); running = false; threadstarted = false; } }

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  • WebLogic Server Performance and Tuning: Part II - Thread Management

    - by Gokhan Gungor
    WebLogic Server, like any other java application server, provides resources so that your applications use them to provide services. Unfortunately none of these resources are unlimited and they must be managed carefully. One of these resources is threads which are pooled to provide better throughput and performance along with the fast response time and to avoid deadlocks. Threads are execution points that WebLogic Server delivers its power and execute work. Managing threads is very important because it may affect the overall performance of the entire system. In previous releases of WebLogic Server 9.0 we had multiple execute queues and user defined thread pools. There were different queues for different type of work which had fixed number of execute threads.  Tuning of this thread pools and finding the proper number of threads was time consuming which required many trials. WebLogic Server 9.0 and the following releases use a single thread pool and a single priority-based execute queue. All type of work is executed in this single thread pool. Its size (thread count) is automatically decreased or increased (self-tuned). The new “self-tuning” system simplifies getting the proper number of threads and utilizing them.Work manager allows your applications to run concurrently in multiple threads. Work manager is a mechanism that allows you to manage and utilize threads and create rules/guidelines to follow when assigning requests to threads. We can set a scheduling guideline or priority a request with a work manager and then associate this work manager with one or more applications. At run-time, WebLogic Server uses these guidelines to assign pending work/requests to execution threads. The position of a request in the execute queue is determined by its priority. There is a default work manager that is provided. The default work manager should be sufficient for most applications. However there can be cases you want to change this default configuration. Your application(s) may be providing services that need mixture of fast response time and long running processes like batch updates. However wrong configuration of work managers can lead a performance penalty while expecting improvement.We can define/configure work managers at;•    Domain Level: config.xml•    Application Level: weblogic-application.xml •    Component Level: weblogic-ejb-jar.xml or weblogic.xml(For a specific web application use weblogic.xml)We can use the following predefined rules/constraints to manage the work;•    Fair Share Request Class: Specifies the average thread-use time required to process requests. The default is 50.•    Response Time Request Class: Specifies a response time goal in milliseconds.•    Context Request Class: Assigns request classes to requests based on context information.•    Min Threads Constraint: Limits the number of concurrent threads executing requests.•    Max Threads Constraint: Guarantees the number of threads the server will allocate to requests.•    Capacity Constraint: Causes the server to reject requests only when it has reached its capacity. Let’s create a work manager for our application for a long running work.Go to WebLogic console and select Environment | Work Managers from the domain structure tree. Click New button and select Work manager and click next. Enter the name for the work manager and click next. Then select the managed server instances(s) or clusters from available targets (the one that your long running application is deployed) and finish. Click on MyWorkManager, and open the Configuration tab and check Ignore Stuck Threads and save. This will prevent WebLogic to tread long running processes (that is taking more than a specified time) as stuck and enable to finish the process.

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