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  • SQL Monitor Custom Metric: Out of memory errors

    The number of out of memory errors that have occurred within a rolling five minute window. If you just want to keep an eye out for any memory errors, you can watch the ring buffers for the Out of memory errors alert when it gets registered there. Get alerts within 15 seconds of SQL Server issuesSQL Monitor checks performance data every 15 seconds, so you can fix issues before your users even notice them. Start monitoring with a free trial.

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  • New Spatial Features in SQL Server Code-Named 'Denali'

    SQL Server 2008 introduced spatial data support into the database server. This paper describes and discusses the new spatial features in SQL Server Code-Named “Denali” CTP1 and CTP3 that augment existing SQL Server 2008 and SQL Server 2008 R2 spatial functionality. The Future of SQL Server MonitoringMonitor wherever, whenever with Red Gate's SQL Monitor. See it live in action now.

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  • Foreign key restrictions -> yes or no?

    - by This is it
    I would like to hear some”real life experience” suggestions if foreign key restrictions are good or bad thing to enforce in DB. I would kindly ask students/beginners to refrain from jumping and answering quickly and without thinking. At the beginning of my career I thought that stupidest thing you can do is disregard the referential integrity. Today, after "few" projects I'm thinking different. Quite different. What do you think: Should we enforce foreign key restrictions or not? *Please explain your answer.

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  • Stairway to SQL Server Agent: Step 1: Setup and Overview

    SQL Server Agent is a Microsoft Windows service that allows a DBA to automate administrative tasks. SQL Server Agent can run jobs, monitor SQL Server, and process alerts. The SQL Server Agent service must be running before any jobs scheduled to execute automatically can be run Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • simple sql group by custom groups question [migrated]

    - by alex
    imagine a mysql table that only has 2 columns, an id and a name of a color. with this query I know how many id's do I have for each color. SELECT color_name, count(id) FROM color_table GROUP BY (color_name); red:10 blue:5 yellow:3 green:1 my question is, is there a way I can specify to the "group by" some custom groups?? i mean, is there a query that results in this??: red:10 colors different than red: 9

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  • Free eBook: SQL Server Hardware

    SQL Server Hardware will provide the fundamental knowledge and resources you need to make intelligent decisions about choice, and optimal installation and configuration, of SQL Server hardware, operating system and the SQL Server RDBMS. New! SQL Prompt 6 – now with tab historyWriting, exploring, and editing SQL just became even more effortless with SQL Prompt 6. Download a free trial.

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  • Advised auditing method for MS SQL to track changes made to a specific table by a specific user?

    - by scape
    What is the best method for tracking changes or logging the queries done to a table by a specific user when the person is using Management Studio? I'm using 2008 R2 Express Edition and want to specifically track a single user who logs in through Management studio and runs queries to make changes manually. I want to see what query was run and thus determine what was changed and how. I am not interested in restoring the information. I considered Change Tracking but read that it is not ideal for auditing as well I am unsure how to read the data, then I considered the Bulk-Logging option on the database however I then have to consider handling the log files which may grow huge as the database is used constantly by a web app. I am wondering if there is a more concise method to do what I want?

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  • Sql statement return with zero result [closed]

    - by foodil
    I am trying to choose the row where 1)list.ispublic = 1 2)userlist.userid='aaa' AND userlist.listid=list.listid I need 1)+2) There is a row already but this statement can not get that row, is there any problem? List table: ListID ListName Creator IsRemindSub IsRemindUnSub IsPublic CreateDate LastModified Reminder 1 test2 aaa 0 0 1 2012-03-09 NULL NULL user_list table (No row): UserID ListID UserRights My test version SELECT l.*, ul.* FROM list l INNER JOIN user_list ul ON ul.ListID = l.ListID WHERE l.IsPublic = 1 AND ul.UserID = 'aaa' There is zero result. How can I fix that?

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  • Is an average RAM usage per Apache process of 43 MB "normal" for a Social Networking site? [closed]

    - by Programmer
    I have a Social Networking site that runs on a single LAMP Server that handles everything. The average RAM usage per Apache process is 43 MB. Is that amount roughly within the expected range for a Social Networking site, or is it too high? If it's too high, where and how can I look to bring that average number down? (If you need more details to determine whether it's within the expected range or not, just let me know and I'll edit my question to provide them as best I can.)

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  • SQL Server Semantic Search to Find Text in External Files

    Sometimes it is necessary to search for specific content inside documents stored in a SQL Server database. Is it possible to do this in SQL Server? Can I run T-SQL queries and find content inside Microsoft Word files? Yes, now with SQL Server 2012 you can do a semantic search. 12 essential tools for database professionalsThe SQL Developer Bundle contains 12 tools designed with the SQL Server developer and DBA in mind. Try it now.

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  • Mimicking Network Databases in SQL

    Unlike the hierarchical database model, which created a tree structure in which to store data, the network model formed a generalized 'graph' structure that describes the relationships between the nodes. Nowadays, the relational model is used to solve the problems for which the network model was created, but the old 'network' solutions are still being implemented by programmers, even when they are less effective.

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  • Helloooooooooooo, is anybody here?

    - by The Official Microsoft IIS Site
    Well, to start off with, we got a great response to our PHP survey and …. But wait, first things first, let us start off with introductions. I joined the team recently as the Program Manager for this driver. I’ve worked on several technologies in my career and very excited to be a part of this great team and look forward to working with you all, the PHP developer community! PHP and its ecosystem is new to me, so I’ve been ramping up over the last few months as well as helping the team as best I can...(read more)

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  • SQL Saturday #263 Manila, Phillipines

    SQL Saturday is a training event for SQL Server professionals and those wanting to learn about SQL Server. This event will be held Nov 9 2013, admittance to this event is free, all costs are covered by donations and sponsorships. New! SQL Prompt 6 – now with tab historyWriting, exploring, and editing SQL just became even more effortless with SQL Prompt 6. Download a free trial.

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  • DB12c In-Memory & JSON ?????

    - by katsumii
    ???8?18??20????????? DB12c PS1(PatchSet 1, 12.1.0.2.0)?????????JSON ??In-Memory Option ??????????????????????????????????????????????????????????????????????????In-Memory???????????????????????????????????????????????????????????????????????[????] Oracle Database 12c In-Memory?????????! (Oracle Technology Network Japan Blog)?Oracle Database 12c? Oracle In-Memory Option???? 8?28?(?)19:00 ~20:40 @  ??????????(??????)

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  • Are there more secure alternatives to the .Net SQLConnection class?

    - by KeyboardMonkey
    Hi SO people, I'm very surprised this issue hasn't been discussed in-depth: This article tells us how to use windbg to dump a running .Net process strings in memory. I spent much time researching the SecureString class, which uses unmanaged pinned memory blocks, and keeps the data encrypted too. Great stuff. The problem comes in when you use it's value, and assign it to the SQLConnection.ConnectionString property, which is of the System.String type. What does this mean? Well... It's stored in plain text Garbage Collection moves it around, leaving copies in memory It can be read with windbg memory dumps That totally negates the SecureString functionality! On top of that, the SQLConnection class is non-inheritable, I can't even roll my own with a SecureString property instead; Yay for closed-source. Yay. A new DAL layer is in progress, but for a new major version and for so many users it will be at least 2 years before every user is upgraded, others might stay on the old version indefinitely, for whatever reason. Because of the frequency the connection is used, marshalling from a SecureString won't help, since the immutable old copies stick in memory until GC comes around. Integrated Windows security isn't an option, since some clients don't work on domains, and other roam and connect over the net. How can I secure the connection string, in memory, so it can't be viewed with windbg?

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  • SQL Server stored procedures - update column based on variable name..?

    - by ClarkeyBoy
    Hi, I have a data driven site with many stored procedures. What I want to eventually be able to do is to say something like: For Each @variable in sproc inputs UPDATE @TableName SET @variable.toString = @variable Next I would like it to be able to accept any number of arguments. It will basically loop through all of the inputs and update the column with the name of the variable with the value of the variable - for example column "Name" would be updated with the value of @Name. I would like to basically have one stored procedure for updating and one for creating. However to do this I will need to be able to convert the actual name of a variable, not the value, to a string. Question 1: Is it possible to do this in T-SQL, and if so how? Question 2: Are there any major drawbacks to using something like this (like performance or CPU usage)? I know if a value is not valid then it will only prevent the update involving that variable and any subsequent ones, but all the data is validated in the vb.net code anyway so will always be valid on submitting to the database, and I will ensure that only variables where the column exists are able to be submitted. Many thanks in advance, Regards, Richard Clarke Edit: I know about using SQL strings and the risk of SQL injection attacks - I studied this a bit in my dissertation a few weeks ago. Basically the website uses an object oriented architecture. There are many classes - for example Product - which have many "Attributes" (I created my own class called Attribute, which has properties such as DataField, Name and Value where DataField is used to get or update data, Name is displayed on the administration frontend when creating or updating a Product and the Value, which may be displayed on the customer frontend, is set by the administrator. DataField is the field I will be using in the "UPDATE Blah SET @Field = @Value". I know this is probably confusing but its really complicated to explain - I have a really good understanding of the entire system in my head but I cant put it into words easily. Basically the structure is set up such that no user will be able to change the value of DataField or Name, but they can change Value. I think if I were to use dynamic parameterised SQL strings there will therefore be no risk of SQL injection attacks. I mean basically loop through all the attributes so that it ends up like: UPDATE Products SET [Name] = '@Name', Description = '@Description', Display = @Display Then loop through all the attributes again and add the parameter values - this will have the same effect as using stored procedures, right?? I dont mind adding to the page load time since this is mainly going to affect the administration frontend, and will marginly affect the customer frontend.

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  • UITableView's NSString memory leak on iphone when encoding with NSUTF8StringEncoding

    - by vince
    my UITableView have serious memory leak problem only when the NSString is NOT encoding with NSASCIIStringEncoding. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"cell"; UILabel *textLabel1; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; textLabel1 = [[UILabel alloc] initWithFrame:CGRectMake(105, 6, 192, 22)]; textLabel1.tag = 1; textLabel1.textColor = [UIColor whiteColor]; textLabel1.backgroundColor = [UIColor blackColor]; textLabel1.numberOfLines = 1; textLabel1.adjustsFontSizeToFitWidth = NO; [textLabel1 setFont:[UIFont boldSystemFontOfSize:19]]; [cell.contentView addSubview:textLabel1]; [textLabel1 release]; } else { textLabel1 = (UILabel *)[cell.contentView viewWithTag:1]; } NSDictionary *tmpDict = [listOfInfo objectForKey:[NSString stringWithFormat:@"%@",indexPath.row]]; textLabel1.text = [tmpDict objectForKey:@"name"]; return cell; } -(void) readDatabase { NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDir = [documentPaths objectAtIndex:0]; databasePath = [documentsDir stringByAppendingPathComponent:[NSString stringWithFormat:@"%@",myDB]]; sqlite3 *database; if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK) { const char sqlStatement = [[NSString stringWithFormat:@"select id,name from %@ order by orderid",myTable] UTF8String]; sqlite3_stmt *compiledStatement; if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK) { while(sqlite3_step(compiledStatement) == SQLITE_ROW) { NSString *tmpid = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)]; NSString *tmpname = [NSString stringWithCString:(const char *)sqlite3_column_text(compiledStatement, 1) encoding:NSUTF8StringEncoding]; [listOfInfo setObject:[[NSMutableDictionary alloc] init] forKey:tmpid]; [[listOfInfo objectForKey:tmpid] setObject:[NSString stringWithFormat:@"%@", tmpname] forKey:@"name"]; } } sqlite3_finalize(compiledStatement); debugNSLog(@"sqlite closing"); } sqlite3_close(database); } when i change the line NSString *tmpname = [NSString stringWithCString:(const char *)sqlite3_column_text(compiledStatement, 1) encoding:NSUTF8StringEncoding]; to NSString *tmpname = [NSString stringWithCString:(const char *)sqlite3_column_text(compiledStatement, 1) encoding:NSASCIIStringEncoding]; the memory leak is gone i tried NSString stringWithUTF8String and it still leak. i've also tried: NSData *dtmpname = [NSData dataWithBytes:sqlite3_column_blob(compiledStatement, 1) length:sqlite3_column_bytes(compiledStatement, 1)]; NSString *tmpname = [[[NSString alloc] initWithData:dtmpname encoding:NSUTF8StringEncoding] autorelease]; and the problem remains, the leak occur when u start scrolling the tableview. i've actually tried other encoding and it seems that only NSASCIIStringEncoding works(no memory leak) any idea how to get rid of this problem?

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  • Visual C# 2008 Express connection to SQL Server 2008 Express problem

    - by Phil
    Hi guys, I have a problem with Visual C# 2008 express (SP1) connecting to SQL Server 2008 express. The "Add Connection" window (wherever initiated) doesn't list existing sql server and no option for sql server except a compact edition. Note that, I've got the VWD 2008 express (SP1) on the same machine which shows the window regularly (with SQL server listed) and SQL Server Management studio works fine with the server as well. I've seen other similar posts, did take some advices: reinstalled the VC#, services run ok, etc... but with no success with VC# so far. Again, on the same machine the VWD shows the dialog with sql server option regularly, but VC# shows only 3 options in "Change data source" dialog (1. Microsoft Access Database File (OLE DB) 2. Microsoft SQL Server Compact 3.5, 3. Microsoft SQL Server Database File) Any idea? Thanks in advice, Phil

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  • AVAudioRecorder Memory Leak

    - by Eric Ranschau
    I'm hoping someone out there can back me up on this... I've been working on an application that allows the end user to record a small audio file for later playback and am in the process of testing for memory leaks. I continue to very consistently run into a memory leak when the AVAudioRecorder's "stop" method attempts to close the audio file to which it's been recording. This really seems to be a leak in the framework itself, but if I'm being a bonehead you can tell me. To illustrate, I've worked up a stripped down test app that does nothing but start/stop a recording w/ the press of a button. For the sake of simplicty, everything happens in app. delegate as follows: @synthesize audioRecorder, button; @synthesize window; - (BOOL) application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // create compplete path to database NSString *tempPath = NSTemporaryDirectory(); NSString *audioFilePath = [tempPath stringByAppendingString:@"/customStatement.caf"]; // define audio file url NSURL *audioFileURL = [[NSURL alloc] initFileURLWithPath:audioFilePath]; // define audio recorder settings NSDictionary *settings = [[NSDictionary alloc] initWithObjectsAndKeys: [NSNumber numberWithInt:kAudioFormatAppleIMA4], AVFormatIDKey, [NSNumber numberWithInt:1], AVNumberOfChannelsKey, [NSNumber numberWithInt:AVAudioQualityLow], AVSampleRateConverterAudioQualityKey, [NSNumber numberWithFloat:44100], AVSampleRateKey, [NSNumber numberWithInt:8], AVLinearPCMBitDepthKey, nil ]; // define audio recorder audioRecorder = [[AVAudioRecorder alloc] initWithURL:audioFileURL settings:settings error:nil]; [audioRecorder setDelegate:self]; [audioRecorder setMeteringEnabled:YES]; [audioRecorder prepareToRecord]; // define record button button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button addTarget:self action:@selector(handleTouch_recordButton) forControlEvents:UIControlEventTouchUpInside]; [button setFrame:CGRectMake(110.0, 217.5, 100.0, 45.0)]; [button setTitle:@"Record" forState:UIControlStateNormal]; [button setTitle:@"Stop" forState:UIControlStateSelected]; // configure the main view controller UIViewController *viewController = [[UIViewController alloc] init]; [viewController.view addSubview:button]; // add controllers to window [window addSubview:viewController.view]; [window makeKeyAndVisible]; // release [audioFileURL release]; [settings release]; [viewController release]; return YES; } - (void) handleTouch_recordButton { if ( ![button isSelected] ) { [button setSelected:YES]; [audioRecorder record]; } else { [button setSelected:NO]; [audioRecorder stop]; } } - (void) dealloc { [audioRecorder release]; [button release]; [window release]; [super dealloc]; } The stack trace from Instruments that shows pretty clearly that the "closeFile" method in the AVFoundation code is leaking...something. You can see a screen shot of the Instruments session here: Developer Forums: AVAudioRecorder Memory Leak Any thoughts would be greatly appreciated!

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  • .NET RegEx "Memory Leak" investigation

    - by Kevin Pullin
    I recently looked into some .NET "memory leaks" (i.e. unexpected, lingering GC rooted objects) in a WinForms app. After loading and then closing a huge report, the memory usage did not drop as expected even after a couple of gen2 collections. Assuming that the reporting control was being kept alive by a stray event handler I cracked open WinDbg to see what was happening... Using WinDbg, the !dumpheap -stat command reported a large amount of memory was consumed by string instances. Further refining this down with the !dumpheap -type System.String command I found the culprit, a 90MB string used for the report, at address 03be7930. The last step was to invoke !gcroot 03be7930 to see which object(s) were keeping it alive. My expectations were incorrect - it was not an unhooked event handler hanging onto the reporting control (and report string), but instead it was held on by a System.Text.RegularExpressions.RegexInterpreter instance, which itself is a descendant of a System.Text.RegularExpressions.CachedCodeEntry. Now, the caching of Regexs is (somewhat) common knowledge as this helps to reduce the overhead of having to recompile the Regex each time it is used. But what then does this have to do with keeping my string alive? Based on analysis using Reflector, it turns out that the input string is stored in the RegexInterpreter whenever a Regex method is called. The RegexInterpreter holds onto this string reference until a new string is fed into it by a subsequent Regex method invocation. I'd expect similar behaviour by hanging onto Regex.Match instances and perhaps others. The chain is something like this: Regex.Split, Regex.Match, Regex.Replace, etc Regex.Run RegexScanner.Scan (RegexScanner is the base class, RegexInterpreter is the subclass described above). The offending Regex is only used for reporting, rarely used, and therefore unlikely to be used again to clear out the existing report string. And even if the Regex was used at a later point, it would probably be processing another large report. This is a relatively significant problem and just plain feels dirty. All that said, I found a few options on how to resolve, or at least work around, this scenario. I'll let the community respond first and if no takers come forward I will fill in any gaps in a day or two.

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  • Flex 4 Spark VideoDisplay in Popup causes memory leak

    - by Ben
    Hi, I'm currently building an air app with FB 4. I have a custom control that contains a VideoDisplay control, and which loaded using the PopupManager. Using the profiler, i've noticed that every time the my popup is loaded the memory for it gets allocated, but when it's closed the memory is never recovered. There's nothing else holding a reference to the popup. And if I don't set the source of the VideoDisplay object, then there is no leak - but as soon as the source is set I get a leak. I can't see any method to force close the stream or anything on the spark VideoDisplay control. Any idea or suggestions? EDIT: I have tried setting the source to null before closing the popup but that doesn't change anything. Also, I'm not holding any event listener to the video

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  • Linq to SQL DataContext Windsor IoC memory leak problem

    - by Mr. Flibble
    I have an ASP.NET MVC app that creates a Linq2SQL datacontext on a per-web-request basis using Castler Windsor IoC. For some reason that I do not fully understand, every time a new datacontext is created (on every web request) about 8k of memory is taken up and not released - which inevitably causes an OutOfMemory exception. If I force garbage collection the memory is released OK. My datacontext class is very simple: public class DataContextAccessor : IDataContextAccessor { private readonly DataContext dataContext; public DataContextAccessor(string connectionString) { dataContext = new DataContext(connectionString); } public DataContext DataContext { get { return dataContext; } } } The Windsor IoC webconfig to instantiate this looks like so: <component id="DataContextAccessor" service="DomainModel.Repositories.IDataContextAccessor, DomainModel" type="DomainModel.Repositories.DataContextAccessor, DomainModel" lifestyle="PerWebRequest"> <parameters> <connectionString> ... </connectionString> </parameters> </component> Does anyone know what the problem is, and how to fix it?

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  • JRuby Slick CanvasGameContainer using too much heap memory

    - by Jwosty
    I'm using Java's Slick library (great, by the way) just fine from JRuby. To start a game, I use AppGameContainer which works completely fine and as expected, but if I try to use CanvasGameContainer instead (I want a resizable window and Slick uses an old version of LWJGL that doesn't support this directly) it throws this error: Fri Jun 01 10:22:07 MDT 2012 INFO:Slick Build #274 Error: Your application used more stack memory than the safety cap of 2048K. Specify -J-Xss####k to increase it (#### = cap size in KB). Specify -w for full StackOverflowError stack trace I've tried increasing the heap size until my computer can't allocate any more memory, but to no avail. The CanvasGameContainer uses an awt window to display, which is resizable. Any ideas on why this is happening and/or how to fix this?

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  • What are good memory management techniques in Flash/as3

    - by Parris
    Hello! So I am pretty familiar with memory management in Java, C and C++; however, in flash what constructs are there for memory management? I assume flash has a sort of virtual machine like java, and I have been assuming that things get garbage collected when they are set to null. I am not sure if this is actually the case though. Also is there a way to force garbage collection in Flash? Any other tips? Thanks

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