Connection pool keeping much-needed each of idle connections

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  By Ref.
  Configure FCAC with TAF Oracle11g r2 instead of use the SCAN
  Re: Configure FCAC with TAF Oracle11g r2 instead of use the SCAN
  
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  Hitesh Gondalia
  
  Published by: hitgon on August 10, 2011 06:38

  hitgon wrote:
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• Time of excessive latency of connection... Adobe Air supports on mobile connection pooling?

  Hello

  I'm developing a mobile application that loads the thumbnail images to a remote server. During testing on the Android platform, however, I discovered that the images are very long to load. By monitoring the server logs, I determined that poor performance is caused by the absence of connection pooling, which means that each request creates a new connection. Running the sample code below on a mobile device produces 20 applications and 20 attempts to connect. By comparison, the same web application or desktop creates 2 connections and reuses connections for the following applications. Important overhead and latency associated with generating new connections has a significant impact on performance, with 20 thumbnails taking about 4-5 seconds to load on mobile compared to 0.5-1 second on a desk.

  I've included a sample application below the emphasis placed on the performance issue. The image itself is very small (290 bytes), to focus the issue on the latency of the connection. I confirmed this behavior on many Android devices running 4.1, 4.0 and 2.3. I also tried using the charger c. URLLoader v. URLStream and v. sequential loading with no change in the behavior of simultaneous connection. Trying to set up the connection to 'keep-alive' in the URLRequest has also no effect.

  package

  {

  import flash.display.Loader;

  import flash.display.Sprite;

  import flash.display.StageAlign;

  import flash.display.StageScaleMode;

  import flash.events.Event;

  import flash.net.URLRequest;

  import flash.utils.getTimer;

  SerializableAttribute public class Main extends Sprite

  {

  private var _count:int = 0;

  public void Main()

  {

  Super();

  internship. Align = StageAlign.TOP_LEFT;

  stage.scaleMode = StageScaleMode.NO_SCALE;

  trace ("Start time" + getTimer() + "ms");

  var loader: Loader;

  var url: String = " " http://fbcdn-profile-a.akamaihd.NET/static-AK/rsrc.php/v2/yo/r/UlIqmHJn-SK.gif ";  290 bytes

  for (var i: int = 0; i < 20; i ++) {}

  loader = new this.addChild (Loader()) as a charger.

  loader.contentLoaderInfo.addEventListener (Event.COMPLETE, complete);

  Loader.Load (new URLRequest (url));

  }

  }

  private void complete(event:Event):void

  {

  _Count ++

  trace ("Completed" + _count + 'to' + getTimer() + "ms");

  }

  }

  }

  So, I have a few questions:

  (1) is there something I can do to allow the reuse of connection?

  (2) is it an inherent limitation with Adobe Air for mobile?

  (3) is that someone can confirm if this limitation exists on other mobile platforms (iOS or Blackberry)?

  Any help you can provide would be greatly appreciated. I really hope that this isn't a fundamental limitation of Adobe Air because it weakens my application to feel very slow.

  Thank you

  Adam

  Hmm. You were quite right, it's a little disappointing!

  This is Android recompiled for 3.4 rather than 3.1.

  null

  OVER 50 with 8 Chargers in 11327 milliseconds or 226,54 by load.   50 8 11327 226,54

  OVER 50 with 50 Chargers in 8899 milliseconds or 177,98 by load.   50 50 8899 177,98

  OVER 50 with 50 Chargers in 9280 milliseconds or 185,6 by load.     50 50 9280 185,6

  OVER 50 with 50 loaders in 9513 milliseconds or 190.26 per charge.   50 50 9513 190.26

  OVER 50 with 8 Chargers in 9744 milliseconds or 194.88 by load.     9744 8 50 194.88

  OVER 50 with 1 Chargers in 16383 milliseconds or 327.66 by load.   16383 1 50 327.66

  Compared with Apple iPad recompiled for 3.4 rather than 3.1.

  null

  OVER 50 with 8 Chargers in 502 milliseconds or 10.04 per charge. 50 8 502 10.04

  OVER 50 with Chargers of 50 to 100 milliseconds or 2 per load.     50 50 100 2

  OVER 50 with 50 Chargers in 117 milliseconds or 2.34 per charge. 50 50 117 2.34

  OVER 50 with 50 Chargers in 93 milliseconds or 1.86 per charge.  50 50 93 1.86

  OVER 50 with 8 tires in 270 milliseconds or 5.4 per charge.    50 8 270 5.4

  OVER 50 with 8 Chargers in milliseconds of 307 or 6.14 per charge.  50 8 307 6.14

  OVER 50 with 8 Chargers in 316 milliseconds or 6.32 per charge.  50 8 316 6.32

  OVER 50 with 4 Chargers in 555 milliseconds or 11.1 per charge.  50 4 555 11.1

  OVER 50 with 4 Chargers in 547 milliseconds or 10.94 per charge. 50 4 547 10.94

  OVER 50 with 4 Chargers in 535 milliseconds or 10.7 per charge.  50 4 535 10.7

  OVER 50 with 2 Chargers in 1038 milliseconds or 20,76 by load.        50 2 1038 20,76

  OVER 50 with 2 Chargers in 1042 milliseconds or 20,84 by load.        50 2 1042 20,84

  OVER 50 with 1 Chargers in 2107 milliseconds or 42,14 by load.        50 1 2107 42,14

  OVER 50 with 1 Chargers in 2099 milliseconds or 41,98 by load.        50 1 2099 41,98

  Both are on the exit compilation, which should take all of the variability. So, Yes, it is as if the Runtime AIR 3.4 lost the pool of connections, but ONLY for Android.

  PS: Code I used in my test (which was a view based Mobile application conventional) is below in case you want to include it when you submit a bug report.

  
  http://ns.Adobe.com/MXML/2009.
  xmlns:s = "library://ns.adobe.com/flex/spark" title = "TestLLatency" xmlns:mx = "library://ns.adobe.com/flex/mx" >
  
    Import mx.events.FlexEvent;
    
  protected function uicomponent1_creationCompleteHandler(event:FlexEvent):void
  {
  startTest();

  }
      
  public function startTest (): void {}
  If (tail) throw new Error ("Please wait for the previous test at the end.");
  queue = new Array();
  _Count = 0;
  var loader: Loader;
  var i: int;
  for (i = 0; i< numtoqueue;="" i++)="">
  loader = new bob.addChild (Loader()) as a charger.
  Loader.x = (I have 10%) * 50;
  Loader.y = Math.floor (i/5) * 50;
  loader.contentLoaderInfo.addEventListener (Event.COMPLETE, complete);
  queue.push (Loader);
  }
  startTime = getTimer();
  for (i = 0; i
  nextQueue();
  }
  }
  protected var startTime:int;
  protected var endTime:int;
  protected var numToQueue:int = 50;
  protected var numLoaders:int = 8;
  protected var queue: Array;
  private var _count:int;
  private void complete(event:Event):void
  {
  _Count ++
  nextQueue();
  }
  [Bindable] protected var results: String;
  protected function nextQueue (): void {}
  var url: String = "http://fbcdn-profile-a.akamaihd.net/static-ak/rsrc.php/v2/yo/r/UlIqmHJn-SK.gif";  290 bytes
  if(queue && queue.) Length) {}
  var loader: Loader = queue.pop () as a charger.
  Loader.Load (new URLRequest (url));
  } else {if(_count==numToQueue)
  endTime = getTimer();
  var last: int = endTime-startTime;
  results += "\n" + ("COMPLETED" + numToQueue + "with" + numLoaders + "Chargers in ' + (elapsed) +" milliseconds or ' +(elapsed/numToQueue) + ' by load.\t"+[numToQueue,numLoaders,elapsed,elapsed/numToQueue].join("\t ' ""));
  queue = null;
  {while(Bob.numChildren>5)}
  bob.removeChildAt(bob.numChildren-1);
  }
  bob.getChildAt (0) .addEventListener (MouseEvent.CLICK, repeatTest);
  bob.getChildAt (1) .addEventListener (MouseEvent.CLICK, repeatTest);
  bob.getChildAt (2) .addEventListener (MouseEvent.CLICK, repeatTest);
  bob.getChildAt (3) .addEventListener (MouseEvent.CLICK, repeatTest);
  bob.getChildAt (4) .addEventListener (MouseEvent.CLICK, repeatTest);
  }
  }
  protected function repeatTest(event:MouseEvent):void {}
  var dob:DisplayObject = event.target as DisplayObject;
  var testBehaviour:int = dob.parent.getChildIndex (dob);
  try {}
  {Switch (testBehaviour)}
  case 4:
  this.numLoaders = this.numToQueue;
  break;
  case 3:
  this.numLoaders = 8;
  break;
  case 2:
  this.numLoaders = 4;
  break;
  case 1:
  this.numLoaders = 2;
  break;
  case 0:
  this.numLoaders = 1;
  break;
  }
  startTest();
  dob.removeEventListener (MouseEvent.CLICK, repeatTest);
  for (var i: int = 0; i<5;i++)>
  } catch(e:Error) {}
  trace (e.message);
  }
  }
   
  ]]>
  
  
   
  
  
   
   
   
  
  

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  Should cold fusion Pools of independent for each web site applications or can

  all of these Web sites running under DefaultAppPool?

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  And what are the advantages and disadvantages of the two options?

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  Is there a setting I should change who will say active

  instances of w3wp.exe to stop if no activity takes place for a certain

  time to release the memory.

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  Hope some of it is useful.

  /Charlie arehart

  [email protected]

  Quick delivery, help desk services remotely, the demand for CF (and CFBuilder)

  More on http://www.carehart.org/consulting

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  First of all, I apologize if some of these issues are pretty basic. For my work, I have been teaching myself LabVIEW (using one of the books) for the last two months, in addition to a course of semesters of C++ software development. I have flowed through a few examples from the book and have searched these forums + google search, but I found the contradictory and confusing information on how to manage the C string data.

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  Public Function declare bfx_piezo_ClosePort Lib "bfx_piezocontrol.dll" () As Integer

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  On the other

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  End If

  End Sub

  Private Sub Action_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Action.Click

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  RC = bfx_piezo_SetupPiezo (stroke, beat down, HoldTime, ascending, UnloadTime, UnloadCurrent, LoadCurrent and LoadTime) rc += bfx_piezo_Repeat (repetitions, RepeatDelay)

  If rc = 0 Then LogLabel.Text = "Setup dosage settings."

  Only four interested features me search piezo, open port, configure piezo and piezo installation, as seen on my block diagram. My questions concern only the setup functions / openport piezo and how I built the library call nodes function, since these would also address how to set up the other two. When running VI, I get the error code is 1517, with installation function highlighted, leading me to believe that I have this feature badly adjusted upward (and Potentially openport, explained in the next paragraph).

  Function to open the port has two string parameters that are passed by reference, and configure the function takes one of the following strings as a call by value. Can I just wire them together as I did, or is it necessary to do something in the sense of adding a sub - VI GetValueAtPointer to dereference firstly, the pointer to the string and then spend the actual string on the second node?

  To specify the data types in the function library call nodes, I have all channels like C strings, double as double, return numeric values as integers signed 32 (each function returns a digital long I think that for debugging purposes), Boolean as an integer 16 bit signed (after that I forced my Boolean constant in an integer) and one of my numbers in Setup as an integer no signed, as I was told in an e-mail from the manufacturer of the instrument. Should we indicate the call launched by numbers as constants value, or not, since they are not explicitly defined as constants in the code provided? Since they have been specified not as long, I am right to assume signed 16-bit integer for the passage by the digits of the value? Is the Boolean value a 8-bit or 16-bit and signed? If the function has a numeric parameter as a value call, I guess by the wiring in a digital constant, that this value is transferred to the function?

  Again, I apoligize if these questions are too simplistic (and many of them), due to my limited experience programming and possibly scarce documentation of the company during the inspection. I look forward comments about the VI as well, if I had nothing at all just illegal/bad practice.

  Thank you for your time!

  First of all, I'm really not familiar with C/C++ dll, but I remember something the DLL must contain the standard C functions to properly accessible from LabVIEW. I don't know if this is the case here, but lets see more will enlighten this part.

  Second, whenever I have the chance to directly use the simple series commands, I go like this, and I create my own live LabVIEW. As I see in the attached pdf doc, it is possible to order the material through the series without using the DLL (on page 18). If these features meet your needs, I would really screw via VISA program, your life will be much easier...

  Edit: http://www.ni.com/tutorial/3702/en/

• 2 blackBerry Smartphones newbie questions: do I need it, and how I spoil my phone?

  Sorry for the newbie questions:

  My IT has already set up my phone to receive email from their Blackberry Enterprise Server.

  (1) do I still need to install the desktop software?  Given that I can transfer files via Bluetooth from my laptop and my contacts/calendar/notes are stored on the Exchange Server, is there any point?

  (2) if I do not need to install it, given that my email is already working with BES, and the Office installation configures email settings, how do I keep the new Desktop install to mess up the current configuration of e-mail?

  Of all the notes of support on the software, looks like more trouble whereas at this stage.  I really need to treat it?

  Thank you.

  Janimal

  Hi and welcome to the Forums!

  Janimal wrote:

  (1) do I still need to install the desktop software?  Given that I can transfer files via Bluetooth from my laptop and my contacts/calendar/notes are stored on the Exchange Server, is there any point?

  There is not much need of DTM, but it is convenient to update the OS of your BB. Sometimes there will be releases of minor bugs corrections and such to your BB - DTM will be meaningless and install them, while updating wireless could not detect them. For a major OS update, you want DTM, as it will do a backup/complete restoration of your BB, including configuration settings, and others so that you don't have to redo those. But, to your e-mail, calendar, contacts, etc. - you are right, it is useless given that your Exchange Server is actually your master with your BB being actually a backup of that (in a sense).

  In addition, USB drivers (which are part of the package DTM) are necessary in order to charge your BB via your laptop USB. You can download and install all the USB drivers if this is the only part of the DTM you want.

  Janimal wrote:

  (2) if I do not need to install it, given that my email is already working with BES, and the Office installation configures email settings, how do I keep the new Desktop install to mess up the current configuration of e-mail?

  When you install it, it will ask if you are in a company - say Yes and it will install properly. Installation when your PC is connected to your corporate network and your Outlook is open. Who will get the best and fastest configuration. When you install, do not let it select the functions of auto-launch... If you wish, attach your BB and manually run the DTM.

  Of all the notes of support on the software, looks like more trouble whereas at this stage.  I really need to treat it?

  Thank you.

  Janimal

  Basically, on the whole, I vote 'YES'. You get the USB charging. You can save if you wish. You get the device OS and other updates. Most of the reported problems are people using it to synchronize via USB things - you won't do that because most of your stuff will be syncing via BES OTA. Other things, you can simply drag-and - drop (music, videos, etc.). .. .follow these instructions (use the latest 5.0 DTM):

  http://supportforums.BlackBerry.com/Rim/Board/message?board.ID=BlackBerryDesktopSoftware&thread.ID=3...

  DL the latest version here:

  http://NA.BlackBerry.com/eng/services/desktop/

  Good luck!