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• Bug in malloc or mine?

  - by Martin

  Is this my bug or a bug/assertion fail in malloc itself? alloc.c:2451: sYSMALLOc: Assertion `(old_top == (((mbinptr) (((char *) &((av)-bins[((1) - 1) * 2])) - __builtin_offsetof (struct malloc_chunk, fd)))) && old_size == 0) || ((unsigned long) (old_size) = (unsigned long)((((__builtin_offsetof (struct malloc_chunk, fd_nextsize))+((2 * (sizeof(size_t))) - 1)) & ~((2 * (sizeof(size_t))) - 1))) && ((old_top)-size & 0x1) && ((unsigned long)old_end & pagemask) == 0)' failed. libstdc++6:amd64 4.7.2-2ubuntu1 gcc 4.7.2 ubuntu 12.10/64bit

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• Strange hex formatting in NSString

  - by pseudopeach

  Try this: unsigned long long int N; = 23229877463LL; NSString* s = [NSString stringWithFormat:@"dec:%qi, hex:%qX",N,N]; NSLog(@"output: %@",s); output: dec:23229877460, hex:689BCCD400000005 What's up with the 00000005??? In mySQL, hex(23229877460) = 5689BCCD4. Also, every other language seems to do this correctly. A 16 digit long hex is like 4 gazillion (16^16), right? How can I get objective-c to format hex numbers that other languages can understand?

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• Openmpi 1.6.3 on ubuntu 12.10

  - by torem

  I manually installed the tar.gz of openmpi 1.6.3 on Ubuntu 12.10. But now mpif90.openmpi returns the following: Cannot open configuration file /usr/local/share/openmpi/ mpif90.openmpi-wrapper- data.txt Error parsing data file mpif90.openmpi: Not found How can I get mpif90.openmpi get running again? It was running fine if I install openmpi using apt-get install. But that way I will get only version 1.6.1. Thanks.

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• Is it possible to write a generic +1 method for numeric box types in Java?

  - by polygenelubricants

  This is NOT homework. Part 1 Is it possible to write a generic method, something like this: <T extends Number> T plusOne(T num) { return num + 1; // DOESN'T COMPILE! How to fix??? } Short of using a bunch of instanceof and casts, is this possible? Part 2 The following 3 methods compile: Integer plusOne(Integer num) { return num + 1; } Double plusOne(Double num) { return num + 1; } Long plusOne(Long num) { return num + 1; } Is it possible to write a generic version that bound T to only Integer, Double, or Long?

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• Declaration and initialization of local variables - what is most C++ like?

  - by tuergeist

  Hi, I did not find any suitable questions answered yet, so I'd like to know what is "better" C++ style in the mean of performance and/or memory. Both codes are inside a method. The question is: When to declare long prio? And what are the implications? Code 1 while (!myfile.eof()) { getline(myfile, line); long prio = strtol(line); // prio is declared here // put prio in map... // some other things } Code 2 long prio; // prio is declared here while (!myfile.eof()) { getline(myfile, line); prio = strtol(line); // put prio in map... // some other things }

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• writing structs and classes to disk

  - by Phenom

  The following function writes a struct to a file. int btwrite(short rrn, BTPAGE *page_ptr) { long addr; addr = (long) rrn * (long) PAGESIZE + HEADERSIZE; lseek(btfd, addr, 0); return (write(btfd, page_ptr, PAGESIZE)); } The following is the struct. typedef struct { short keycount; /* number of keys in page */ int key[MAXKEYS]; /* the actual keys */ int value[MAXKEYS]; /* the actual values */ short child[MAXKEYS+1]; /* ptrs to rrns of descendants */ } BTPAGE; What would happen if I changed the struct to a class, would it still work the same? If I added class functions, would the size it takes up on disk increase?

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• Would vector of vectors be contiguous?

  - by user1150989

  I need to allocate a vector of rows where row contains a vector of rows. I know that a vector would be contiguous. I wanted to know whether a vector of vectors would also be contiguous. Example code is given below vector<long> firstRow; firstRow.push_back(0); firstRow.push_back(1); vector<long> secondRow; secondRow.push_back(0); secondRow.push_back(1); vector< vector < long> > data; data.push_back(firstRow); data.push_back(secondRow); Would the sequence in memory be 0 1 0 1?

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• Looking for a better alternative to linklabels

  - by user986086

  Please see the two long linklabels below (please ignore the black lines above) Linklabels' length is made dynamically during runtime, and as seen, could be that it's too long and overlapping other text we have (there is another text where you see 'Differences'). My questions are: a) Can I limit the maximum length of a linklabel? b) Is that possible to use a scrollbar with a linklabel (or any similar control) in case that it's too long? e.g. setting it to 200 pixels, and in case it's longer, the user has to scroll the horizontal scroller and see end of the text. I'm using VB.NET on Visual Studio 2008 THANK YOU

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• i have done code so please help

  - by davit-datuashvili

  public class bitap{ public static void main(String[]args){ String text="tbillisi"; String pattern="tbilxiri"; int k=2; int m=pattern.length(); long pattern_mask[]=new long[Character.MAX_VALUE+1]; String result=""; boolean[]R=new boolean[m+1]; long i,d; for (i=0;i<=k;i++){ R[i]=~1; } for (i=0;i if (0==(R[k]& (1< System.out.println(result); } } http://en.wikipedia.org/wiki/Bitap_algorithm from this site

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• How can I pass a type as a parameter in scala?

  - by rsan

  I'm having a really hard time trying to figure out how can I store or pass a type in scala. What I want to achive is something like this: abstract class Foo( val theType : type ) object Foo{ case object Foo1 extends Foo(String) case object Foo2 extends Foo(Long) } So at some point I can do this: theFoo match{ case String => "Is a string" case Long => "Is a long" } and when obtaining the object being able to cast it: theFoo.asInstanceOf[Foo1.theType] Is this possible? If is possible, is a good aproach? What I'm trying to achieve ultimately is writing a pseudo schema for byte stream treatment. E.g if I have an schema Array(Foo1,Foo1,Foo2,Foo3,Foo1) I could parse Arrays of bytes that complain with that schema, if at some point I have a different stream of bytes I could just write a new schema Array(Foo3, Foo4, Foo5) without having to reimplement parsing logic. Regards,

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• Can I define which characters are allowed to 'break' a word?

  - by zneak

  Hey guys, I'm showing up veeeery long URLs in my Safari extension. Obviously, they can't fit on a single line. Currently, word breaking rules make it so most URLs are on two lines: the first one is rather short and ends with the ? symbol, and the other is ridiculously long and contains all the rest of the GET parameters. I'd like to make it so words also break on the & symbol, without screwing up copy-paste if possible. I've tried to replace every & with &\u00ad (& + the soft hyphen character), but it's kind of weird to see the hyphen after the & when there really isn't any in the URL. I thought there was something in store with CSS3 for that kind of problem, but I can't find it. Any suggestion welcome, as long as it works with Safari.

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• In JPA, a Map of embeddable values, that have an embedded entity used as the key

  - by Schmuli

  I'm still new to JPA (and Hibernate, which I'm using as my provider), so maybe this just can't be done, but anyway... Consider the following code: @Entity class Root { @Id private long id; private String name; @ElementCollection private Map<ResourceType, Resource> resources; ... } @Entity class ResourceType { @Id private long id; private String name; } @Embeddable class Resource { private ResourceType resourceType; private long value; } In the database, there is a collection table, 'Root_resources', that stores the values of the map, but the resource type appears twice (actually, the resource type ID does), once as the KEY of the map, and once as part of the value. Is there a way, similar to, say, the @MapKey annotation, to indicate that the key is one of the columns of the value (i.e. embedded)?

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• typedef to store pointers in C

  - by seriouslion

  The Size of pointer depends on the arch of the machine. So sizeof(int*)=sizeof(int) or sizeof(int*)=sizeof(long int) I want to have a custom data type which is either int or long int depending on the size of pointer. I tried to use macro #if, but the condition for macros does not allow sizeof operator. Also when using if-else, typedef is limited to the scope of if. if((sizeof(int)==sizeof(int *)){ typedef int ptrtype; } else{ typedef long int ptrtype; } //ptrtype not avialble here Is there any way to define ptrtype globally?

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• Mulitple words in any order using regex

  - by RC1140

  As the title says , i need to find 2 specific words in a sentence. But they can be in any order and any casing. How do i go about doing this using regex. E.g. This is a very long sentence used as a test From that sentence i need to extract the words test and long in any order i.e. test can be first or long can be first. UPDATE: What i did not mention the first part is it needs to be case insensitive as well

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• Cutting Row with Data and moving to different sheet VBA

  - by user3709645

  I'm trying to cut a row that has the specified cell blank and then paste it into another sheet in the same workbook. My coding works fine to delete the row but everything I've tried to cut and paste keeps giving me errors. Here's the working code that deletes the rows: Sub Remove() 'Remove No Denovo &/or No Peak Seq Dim n As Long Dim nLastRow As Long Dim nFirstRow As Long Dim lastRow As Integer ActiveSheet.UsedRange Set r = ActiveSheet.UsedRange nLastRow = r.rows.Count + r.Row - 1 nFirstRow = r.Row For n = nLastRow To nFirstRow Step -1 If Cells(n, "G") = "" Then Cells(n, "G").EntireRow.Delete Next n End Sub Thanks for any help!

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• How to use tscon on Windows7?

  - by Radek

  I need to run overnight automation testing using RFT and IE on Windows7 virtual machine. I found that restarting the Windows box before the testing starts helps. I am moving the production environment from Windows XP to Windows 7. RFT used to complain when running RFT scripts that CRFCN0557E: Activation failed when running under a Terminal Services environment. This may be caused by using a minimized terminal window - try playing back without minimizing the terminal window (it does not need to be full-screen). Running tscon.exe 0 /dest:console prior starting any RFT script fix the error on Windows XP. But not on Windows7. I did some research and was trying for hours to fix that but nothing helped. There is no screen saver turned on on Windows7. I tried to run both but nothing helped. tscon.exe 0 /dest:console tscon.exe 1 /dest:console On Windows7 tscon returns {ErrorPrintf(): LoadString failed, Error 15105, (0x00003B01)} Error [15105]:The resource loader cache doesn't have loaded MUI entry. Error [0]:The operation completed successfully. On Windows XP tscon returns Could not connect sessionID 0 to sessionname console, Error code 7045 Error [7045]:The requested session access is denied. I just double checked that running tscon.exe 0 /dest:console on Windows XP solves the issue. Cannot understand the output of the tscon command then. Any idea how I can run RFT scripts after I restart the Windows box automatically? Preferably without involving any other computer. I was even thinking to use the old Windows XP to make remote desktop session to make RFT happy. I hope there is other better solution to that.

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• virtualbox installing iso Error "could not find a valid v7 on sda"

  - by MountainX

  I decided to try this suggestion to install Android x86 on Virtual Box. I'm following those steps and I'm at #4. I used the android-x86-4.0-RC1-amd_brazos.iso (because I have a ThinkPad that this might be compatible with and it seemed as good as any of the other choices...) I'm getting an endless series of errors: .[numbers] VFS: could not find a valid v7 on sda. .[numbers] VFS: could not find a valid v7 on sda. repeating... For storage, I made a VDI image sized at 4.0 GB (dynamically allocated) attached on SATA Port 0. Background and more details: I'm running Kubuntu 12.04. I installed VirtualBox 4.1.12 after adding deb http://download.virtualbox.org/virtualbox/debian precise contrib to my sources. EDIT: Now I'm wondering if I installed the right package. I verified that I'm running 4.1.12. But I installed it with apt-get install virtualbox instead of the recommended apt-get install virtualbox-4.1. I checked just now and see this: apt-cache search virtualbox virtualbox - x86 virtualization solution - base binaries virtualbox-4.1 - Oracle VM VirtualBox But when I run VirtualBox, I get the Oracle VM VirtualBox Manager version 4.1.12, so I think I'm OK. I did see one minor issue (possibly related to this question) when installing VB, but in my case I don't think it is actually an error at all: * No suitable module for running kernel found [fail] invoke-rc.d: initscript virtualbox, action "restart" failed. VirtualBox installed and seems to be running fine. I just can't get the ISO image to install. The error is as shown above.

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• ADODB DB2 DSN using IBMDADB2 provider

  - by Eli Sand

  I have a very bizarre issue with trying to establish a working connection to an IBM DB2 server from Classic ASP using ADODB. On my development server I am running IIS and have a local instance of DB2 running. When I create a system DSN on this server and try to connect to it with ADODB, I have to specify Provider=IBMDADB2; in my connection along with the DSN name - failure to include the provider and my connection won't work. On my production server(s), I have one running IIS and a second system running an instance of DB2. When I create a system DSN on the production IIS server and try to connect to it with ADODB, I cannot specify the provider, otherwise it throws an uncatchable error in an external module (I assume it's referring to the DB2 module) if I try to do anything past get a connection (oddly, opening the connection itself doesn't throw an error - but if I run a query it does). If I remove the Provider=IBMDADB2; from the connection string (thus I just have DSN=some_name), it works fine. On both systems I can verify through the ODBC connection manager that the DSN's work and can connect to the databases, and on both systems I have made sure to set the correct (only) instance of DB2 as the default. Can anyone tell me why I have to have different connection strings for the development and production servers? I would like to be able to use the same connection string for both environments if at all possible. If that means either specifying a provider for both, or for neither I don't care which - I would just like to know what's going on and how to fix it.

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• Remote App Authentication Error (Code:0x507)

  - by CMK

  Hi I'm trying to get RDP services running with Windows 2008 R2. I'm at a WINXP SP3 client that was modified to run RDP with NLA. When I start the client connect to the local DC and get an authentification error (Code 0x507). I've already done the following: • Server Setup to run as a standalone local "DC" to provide Terminal services to a single application. Remote Desktop Session Host CAL License is running & operational, RD Gateway Manager w/ Local Server RAP & CAP running NLA & operational etc..... Server has NLA & temporary use of port 3389 (which is directly connected to and accessible from the internet (I am planning to change the port to 443, but want to get the current system running first). • XP Client(s): RDP-Version on win xp clients is 6.1 If had SP2, then added SP3 and edited the registry settings to allow NLA, by: Click Start, click Run, type regedit, and then press ENTER. In the navigation pane, locate and then click the following registry subkey: HKEY_LOCAL_MACHINE \SYSTEM\CurrentControlSet\Control\Lsa In the details pane, right-click Security Packages, and then click Modify. In the Value data box, type tspkg. Leave any data that is specific to other SSPs, and then click OK. In the navigation pane, locate and then click the following registry subkey: HKEY_LOCAL_MACHINE \SYSTEM\CurrentControlSet\Control\SecurityProviders In the details pane, right-click SecurityProviders, and then click Modify. In the Value data box, type credssp.dll. Leave any data that is specific to other SSPs, and then click OK. Exit Registry Editor. Restart the computer.

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• Terminal Server 2008: Installing 16-bit Application (FoxPro 2.6)

  - by JohnyD

  I have one physical Windows 2008 R2 server running Hyper-V. Running under Hyper-V I have a virtual Windows Server 2008 R2 server running Remote Desktop Services (Terminal Services). I'm preparing my applications using the "Install Application on Remote Desktop..." control panel app. So far so good. However, I am now trying to install FoxPro 2.6 which is a 16-bit windows application. When I try to install it I receive the message: "The version of this file is not compatible with the version of Windows you're running. Check your computer's system information to see whether you need an x86 (32-bit) or x64 (64-bit) version of the program, and then contact the software publisher". Is there any way around this? I'm in the middle of a large migration to thin-clients and foxpro 2.6, while it won't be around forever, is a very integral application for our data-entry personnel. How can I get this to work? Thanks in advance!

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• Apachebench on node.js server returning "apr_poll: The timeout specified has expired (70007)" after ~30 requests

  - by Scott

  I just started working with node.js and doing some experimental load testing with ab is returning an error at around 30 requests or so. I've found other pages showing a lot better concurrency numbers than I am such as: http://zgadzaj.com/benchmarking-nodejs-basic-performance-tests-against-apache-php Are there some critical server configuration settings that need done to achieve those numbers? I've watched memory on top and I still see a decent amount of free memory while running ab, watched mongostat as well and not seeing anything that looks suspicious. The command I'm running, and the error is: ab -k -n 100 -c 10 postrockandbeyond.com/ This is ApacheBench, Version 2.0.41-dev <$Revision: 1.121.2.12 $> apache-2.0 Copyright (c) 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Copyright (c) 2006 The Apache Software Foundation, http://www.apache.org/ Benchmarking postrockandbeyond.com (be patient)...apr_poll: The timeout specified has expired (70007) Total of 32 requests completed Does anyone have any suggestions on things I should look in to that may be causing this? I'm running it on osx lion, but have also run the same command on the server with the same results. EDIT: I eventually solved this issue. I was using a TTAPI, which was connecting to turntable.fm through websockets. On the homepage, I was connecting on every request. So what was happening was that after a certain number of connections, everything would fall apart. If you're running into the same issue, check out whether you are hitting external services each request.

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• How to find virtualization performance bottlenecks?

  - by Martin

  We have recently started moving our C++ build server(s) from real machines into VMs. (MS Hyper-V) We have some performance issues that I've currently no idea how to address. We have: Test-Box - this is a piece of desktop workstation hardware my co-worker used to set up the VM before we moved it to the actual server hardware Srv-Box - this is the server hardware Test-Box-Real - This is Windows running directly on the Test-Box HW Test-Box-VM - This is Windows in a Hyper-V VM on the Test-Box HW Srv-Box-Real- This is Server2008R2 running on the Srv-Box HW. Srv-Box-VM- This is Windows running in a Hyper-V VM on the Srv-Box HW, i.e. on Srv-Box-Real. Now, the problem is that we compared Build times between Test-Box-Real and Test-Box-VM and they were basically equal (within about 2%). Then we moved the VM to the Srv-Box machine and what we saw there is that we have a significant performance degradation between Srv-Box-Real and Srv-Box-VM, that is, where we saw no differences on the Test HW we now do see major differences in performance on the actual Server HW. (Builds about ~~ 50% slower inside the VM.) I should add that both the Test-Box and the Srv-Box are only running this one single VM and doing nothing else. I should also note that the "Real" OS is Win2008R2(64bit) and the VM hosted OS is Wind2003R2(32bit). Hardware specs: Srv-Box: Intel XEON E5640 @ 2.67Ghz (This means 8 cores with hyperthreading on the Real system and "only" 4 cores on the VM, since Hyper-V doesn't allow for hyperthreading, but number of cores doesn't seem to explain the problem here.) 16GB RAM (we have 4GB assigned to the VM) Virtual DELL RAID 1 (2x 450GB HUS156045VLS600 Hitachi 15k SAS drives) Test-Box: Intel XEON E31245 @ 3.3GHz 16GB RAM WD VelociRaptor 600GB 10k RPM SATA Note again that I'm only concerned with the differences between Srv-Box-Real and Srv-Box-VM (high) vs. the differences seen btw. Test-Box-Real and Test-Box-VM (low). Why would one machine have parity when comparing VM vs Real performance and the other (server grade HW no less) would have a large disparity? (Both being XEON CPUs ...)

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• BackupExec errors when starting services

  - by blade

  Hi, I've installed backupexec 2010 trial on my server, with an appropriately-privileged AD account, but get errors when starting the required services from the login page: Processing services Start services on server: WIN-HQ7JSCRTTSQ Starting Enterprise Vault Admin Service on WIN-HQ7JSCRTTSQ. The service Enterprise Vault Admin Service is already running on WIN-HQ7JSCRTTSQ. Starting Backup Exec Remote Agent for Windows Systems on WIN-HQ7JSCRTTSQ. The service Backup Exec Remote Agent for Windows Systems is already running on WIN-HQ7JSCRTTSQ. Starting Backup Exec Device & Media Service on WIN-HQ7JSCRTTSQ. Error starting the service Backup Exec Device & Media Service on WIN-HQ7JSCRTTSQ. Service-specific error code returned: 0x2000e2d3 (536928979) Starting Backup Exec Server on WIN-HQ7JSCRTTSQ. Error starting the service Backup Exec Server on WIN-HQ7JSCRTTSQ. The dependency service or group failed to start. Starting Backup Exec Job Engine on WIN-HQ7JSCRTTSQ. Error starting the service Backup Exec Job Engine on WIN-HQ7JSCRTTSQ. The dependency service or group failed to start. Starting Backup Exec Agent Browser on WIN-HQ7JSCRTTSQ. Error starting the service Backup Exec Agent Browser on WIN-HQ7JSCRTTSQ. The dependency service or group failed to start. Starting Backup Exec DLO Administration Service on WIN-HQ7JSCRTTSQ. Error starting the service Backup Exec DLO Administration Service on WIN-HQ7JSCRTTSQ. Error code returned: Starting Backup Exec DLO Maintenance Service on WIN-HQ7JSCRTTSQ. The service Backup Exec DLO Maintenance Service is already running on WIN-HQ7JSCRTTSQ. Starting Backup Exec Web Service on WIN-HQ7JSCRTTSQ. The service Backup Exec Web Service is already running on WIN-HQ7JSCRTTSQ. Start services on server WIN-HQ7JSCRTTSQ completed. Processing services completed! How can I resolve this?

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• How do I start nginx on port 80 at OS X login?

  - by Bryson

  I installed Nginx using homebrew and after completing the installation the following message was displayed: In the interest of allowing you to run `nginx` without `sudo`, the default port is set to localhost:8080. If you want to host pages on your local machine to the public, you should change that to localhost:80, and run `sudo nginx`. You'll need to turn off any other web servers running port 80, of course. You can start nginx automatically on login running as your user with: mkdir -p ~/Library/LaunchAgents cp #{prefix}/org.nginx.nginx.plist ~/Library/LaunchAgents/ launchctl load -w ~/Library/LaunchAgents/org.nginx.nginx.plist Though note that if running as your user, the launch agent will fail if you try to use a port below 1024 (such as http's default of 80.) But I want Nginx, on port 80, running at login and I don't want to have to open terminal and type in sudo nginx to do it. I want it to load from a plist file like Redis and PostgreSQL do. I moved the plist to /Library/LaunchAgents/ from the user folder equivalent and changed its ownership, also tried setting the user directive in the nginx.conf file and still the same error message in Console.app: nginx: [emerg] bind() to 0.0.0.0:80 failed (13: Permission denied) (along with another message telling me that since nginx was being run without super-user privileges, the user directive was being ignored)

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• Too much memory consumed during TFS automated build

  - by Bernard Chen

  We're running TFS 2010 Standard Edition, and we've set up an automated build to run whenever someone checks in code. We run through all of the automated tests (built with MSTest) as part of the build. We've configured the build to run the tests as a 64-bit process, but the QTAgent.exe that runs the tests grows in memory while the tests are running. It is currently reaching 8GB for the ~650 tests we have, and the process has slowed significantly when we went from 450 tests to 650 tests. When we run all of the tests in the local development environment, memory seems to be freed at least with each TestClass and never exceeds a certain level. The process of running all tests has not increased significantly in the local development environment. Is there a way to configure the build service to free up memory with each Test or each TestClass? With the way things are currently running, the build process gets very slow when we start to run out of memory on the machine. Edit: I found the MSTest invocation in the build log and ran it manually and saw the same behavior of runaway memory. I removed the /publish, /publishbuild, /teamproject, /platform, and /flavor parameters from the invocation of MSTest, in case the test runner was holding onto results until the end, but the behavior didn't change. I ran the same command line on a dev box, separate from the build server, and the memory freed up frequently. It seems there must be something wrong/different about the build server that is causing it to behave different, but I'm stumped where to look. I've looked at qtagent.exe.config, mstest.exe.config, versions of both executables. What else might affect this?

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