So I am wondering about Mike's response=2E Do you guys think a= virus scanner could have something to do with high CPU usage=2E = Because I have a app sitting on a server listening for stuff=2E = As a request comes in it parses the request and creates a SQL= report=2E Anyway, the memmory u...more >>

Hello, I would like to know the following: In VB 6 I could create a dll file, place it on a server and register the dll file on each client computer, so all client computers know that the dll file is on the server. This way, I could make small changes to the dll, without having to reïnstal...more >>

Hi DateTime.Ticks is very slow I use it but it is updated 64 times in a second. I think performance counter is the fastest counter but I could not use it for elapsed time. It is complicated. are there any counter that updates faster and simple coding? ...more >>

We have an application develped in asp.net whcih supports multiple database the database type is stored in web.config file.. But my BL layer componenet only need to know dbtype.. so what are the best ways of storing the db type and reading it.. 1. web.config. 2. Remoting config 3. or any...more >>

I have a Windows 2003 Web Edition box which has asp.net and asp pages = both accessing serviced components. The components don't seem to run = slow, but the pages which are written in asp.net are rendered painfully = slow. Any suggestions? Thanks, Rob...more >>

Need - stream data from a UDP source Problem - While trying to do blocking receive we are using Socket.Poll(....) but according to ClrProfiler the call to Poll allocates about 1.5 MB per minute which causes extensive GC activity. How could I have the best performance on UDP reading in term o...more >>

I'm running ClrProfiler for the first time to profile my web app, and it keeps getting stuck at this msg box: "Waiting for Asp.net to start common language runtime - this is the time to load your test page." even after I launched my app and aspnet_wp.exe is running. I found some old post, a pe...more >>

Hi All, I am maintaining one small web site and concurrent users less than 20 only(win2003/iis 6.0). In my production IIS server w3wp.exe service Count increasing day by day in task manager. If it continuous like this, one day server will hang up. why t he ideal work processes not ge...more >>

Hi, I create application which transform huge XML files (~ 150 Mb) to CVS files. And I am facing strange problem. First 1000 rows parsed in 1 sec after 20000 rows speed down to 100 rows per sec, after 70000 rows speed down to 20 rows per sec ( I should parse ~ 2 500 000 rows). For me it ...more >>

(Type your message here) -------------------------------- From: John Stephens Hi Naill, Did you ever determine what the cause of the memory retention= your app? I'm writing a =2ENet add-on to a MFC app=2E The clr heap= always stays small (1-7MB), and I have most of the code NGen'ed= and ...more >>

Hi Everyone, Does .NET offer any collection class which will give me objects last *accessed* such that I may build a least-recently-used cache that kills off objects that haven't been used for awhile? Or is there any other way to implement this kind of a cache / collection where one can do ...more >>

Hello, I've developed a lot of database-systems in Microsoft Access. Now I'm going to develop a large system in VB.NET. Before I start, I'm testing some performance differences between MS Access and VB.NET. When I connect to a large table (more than 100.000 records) from a database with MS Ac...more >>

Can you please help me with these questions. 1. I have a static method in a class. This method may be simultaneously called by 2 or more classes. What will happen? 2. Two users are trying update a record in database. First user has updated the database. The second user does not know it. He is ...more >>

Hi everyone, My application is written in VB.NET and will run on a SmartPhone. My problem is that my application is making too many string copy (String.Substring(...)) which is slowing my application. Example of what the application has to do: oSize = oGraph.MeasureString(strValue.Subst...more >>

I'm in need to download big files using async operations, I've done my implementation based on this example: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemnethttpwebrequestclassbegingetresponsetopic.asp im facing the problem that after 1-2 seconds the...more >>

Hi, In my quest for performance, I come up with another question... There is no DataTable.Copy() with CF and I need to do that. So I came up with my own implementation which is as follow: public static DataTable DataTableCopy(DataTable dtOriginal) { DataTable dtCopy = dtOriginal.Clone();...more >>

I have an application that uses HTTPHandlers to calculate the response to send back to the user. The handler handles all calls to *.test and is working fine. Observed: In FileMon, I was surpised to see the w3wp.exe process trying to find *.test files on the disk. Expected: It seems like ...more >>

I need to write an app in C# that monitors several processes and sends an alert via e-mail when any of those processes goes over a certain CPU usage. The process I need to monitor are all instances of the same console app. Any help getting started would be appreciated. Thanks. ...more >>

Could someone point me in the direction of good discussions on scalable state management solutions? Specifically, pros and cons of following strategies: Strategy 1 : temporary business-objects are implicitly stored in RAM, "permanent" business objects are explicitly stored in SQL-Server ...more >>

I wanted to decorate the features of a base class by declaring a virtual method and deriving a new class, which overrides this method. As I implemented this I found a strange performance behavior, that occours as soon as I start nesting this concept. I call this "strange performance behavior" be...more >>

Why can't we use switches with singleton objects? I know that the compiler cannot optimize them like constant values but the same is true for strings and they are allowed in switches. The reason is that I often use singleton classes as replacement for enum's because enums does'nt provide me a ...more >>

Hi! I'm trying to read a fixed length text file, get the information for each field from an XML file that describes the length of each sequential field, and them put them in SQL database. Here's what I'm doing thus far: 1) Generate a new command object with same name parameters as defined in...more >>

I am implimenting Performance counters into a web application. I use the following code to create the counters during setup: private void SetupPerfCntrs() { System.Diagnostics.CounterCreationDataCollection CounterDatas = null; System.Diagnostics.CounterCreationData cdCounter4 = null; try ...more >>

Why is the following code so slow? I have a listView that must refresh it's processes data every 3 seconds. However, this sometimes goes beyond 5 seconds and crashes the application. I have tries multi-threading, also ListView.BeginUpdate + EndUpdate(), but the code is sooo slow. Try it for your...more >>

On a pure 64Bit processor, will .NET be slow because int is always 32bit, regardless on which platform it runs? Or does the jitter internally propagate the int to an int64? In the C/C++ language they made the size of int platform dependent just for that reason. Am I right with these assumptions...more >>

can i use datatable in place of dataset and fill it by dataadapter if yes then how-------------------------------- From: surender singh ----------------------- Posted by a user from .NET 247 (http://www.dotnet247.com/) <Id>BIC5PiXID02lbqQcXdvrZA==</Id>...more >>

I have an application that allows for searches, but it appears when I stress test it with 50+ users the CPU utilization on the MS SQL server machine is hitting 100%. The machine is on RAID SCSI, running on 4GB of memory and dual AMD Opteron cpu's. I can get a more powerful machine, but not sure...more >>

I'm getting the following 2 errors randomly when doing a load test on a web application's search engine. As far as I know, there isn't writing to the DB involved when doing searches, so I'm at a loss of why this occurs under load. I'm not the programmer, but this doesn't seem right. Can someon...more >>

I am experiencing high CPU utilization with my ASP.NET application. The w3wp.exe process uses 75%-80% CPU for about 10 seconds. I notice this when the application first starts up, which I can partially understand since ASP.NET compiles the application on the first access. However, I also notice...more >>

I am assuming that data set (through its base class) may need to have finalizer defined for typed data set. If this is the case, what is the justification for penalizing the code that does not use typed data set? If this is not the case, I would appreciate if any one can post a convincing respon...more >>

Hi, Anybody know why when I create a single instance performance counter, PerfMon shows the instance names as "systemdiagnosticssharedsingleinstance"? Code sample is below (I've also tried using the named instance overload of the PerformanceCounter constructor and leaving the instance name ...more >>

I have a class AddressBook, with string variables. public class AddressBook { int ID; string name; string address; string email; /* Addressbook functions */ } And in another class i fill arraylist adressList with object of AddressBook. for(int i= 0;i <100; i++) { AddressBook addr...more >>

We are having issues with DataSet and related objects. They are staying in the memory for too long. When we started investigating the problem, windows debugger (windbg) showed that they are in the finalization queue. This surprised us as we were not aware that they have finalizers defined. The...more >>

Hi, i'm running a website with multiple ASP.net apps on the boxes, we are running into a situation with our servers that handle the asp traffic spiking to 100 % cpu traffic. This is not happening during peak times and the aspnet_wp.exe process seems to be the problem child. I have SP 3 for .ne...more >>

Hi all, I'm trying to measure the amount of memory shared between two instances of an application. So far, I can't measure any sharing whatsoever and I'm suspecting that I'm either measuring wrongly or that there is no sharing at all. Here are some details: * I am measuring by recording the ...more >>

Hi, I'd like to know if there is a way to limit the overall download speed of the system. For example, setting the maximum bandwidth to 500kbps (50kb/s). Is this possible using the performance counters or in any other way using .NET ? Thanks -------------------------------- From: Max Larabie ...more >>

I am working on a LDAP add-in for Outlook and I am having = performance issues. The query is exceedingly long to the point the = add-in is not usable. Below is the code any help will be greatly = appreciated. ;-) Thanks, _________________________________________________________________...more >>

Hi all, I have a server application we may be hosting 1000+ client sessions so I want to avoid the "thread per client" model to avoid thread thrashing, memory overhead etc etc. At the moment I have a thread per socket that simply sits on the blocking Recieve to read and parse incoming da...more >>

Almannan MK Hai, I have to compare the values of the dataset before being edited and after editing. so can any body guide me How can I Compare the Record Column values before and after editing Thanks for Your Concern. ...more >>

in relation to number of interfaces that object implements. I have a weired design idea that needs classes to implement a lot(say tens) of interfaces. I an wondering how .net searches for the right one when an object is cast to an interface in the runtime. Is it a linear search, a binary se...more >>

Hi there! I have a task: validate huge amount of URLs from DB. To accomplish it I'm using synchronous HttpWebRequests and accordingly HttpWebResponses. I had implemented multi-threaded utility that sends SYNCHRONOUS requests in each thread and wait for responses. I realized that .NET Fra...more >>

Hi, we have a client application polling an ASP.NET XML WebService every 2 seconds (a simple method call, passing two strings, a long, and an enum, which returns a string array). When using asynchronous calls (so as to not to have the user interface hang during transmission), working-set...more >>

I'm reading this article http://msdn.microsoft.com/msdnmag/issues/1200/GCI2/default.aspx the part I found interesting is "Garbage-collecting Large Objects: There is one more performance improvement that you might want to be aware of. Large objects (those that are 20,000 bytes or larger) are a...more >>