Invert the table to the Add element to the front of the performance of Bay

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• Comparison of the results of the performance and the sum of the sum of array elements

  I did a comparison of the performance of "Add table" with 2 other methods (an Add elements and function of ddot BLAS) to see who was the fastest and also to compare their results, given that I was watching a few slight differences.

  Conclusions
  BLAS ddot's quicker (just a little), then add items, then add it in a loop of table

  BLAS ddot and add items table give identical results almost all the time.

  I don't know why add items in a loop manually gives a slightly different result. I understand there are any rounding due to finite precision errors, but why is it different for the 2 other methods?

  This classic of digital computing: the quality of the result depends on the order of operations.

  A simple example is the calculation of a * b / c with a, b, c equal to 25, 200 and 100 respectively. The result should be 50, but if a, b and c are U8, the result depends on the order of operation, as shown in the example below. DBL and data non-entier, the difference is of course that much smaller, but still there are!

  

  

  In your case, the difference also stems from the order of operations:

  -in the table add-in, the product of all the elements is calculated first and then the elements of the array are added.

  -in the loop, the addition is performed after each multiplication.

• Remove the performance of a large table or several small tables.

  I have a table with 30 million lines, that is used in a statistic application developed in home treatment.
  
  In the process, there is an application that will scan old records and then remove them from the database.
  
  I'm looking for a way to improve it, and I am currently faced with alternatives:
  
  Option #1
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  Option #2
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  From a logistical point of view, I'd prefer Option #2, my only concern with him is what's performance comparrison between:
  
  50 processes Delete form 50 small individual tables with 100,000 rows in each
  vs
  50 to a table with more than 30 million lines removal process
  
  Anyone has any experience on a preview?
  
  We use an instance of Oracle 9i, no partitioning.
  
  Unfortunately I don't have a lot of control in the application or make major changes to Oracle.

  940507 wrote:
  It redundant seams, one of the reasons why I prefer Option 2, using additional criteria...

  I just need to make sure that when 20 process attempts to remove it from the same table with 30 + million lines, the contetion on the updating of the table, index... will not introduce a point of suffocation.

  This can vary widely based on the distribution of data and model of data access. Oracle accesses data in blocks, so if someone updates an another line of the block while you delete, you could get a transaction wait. For playback from your deletion, Oracle is good, not blocking, but compromise can be a lot of waiting. If your data in the table such as two of your processes to remove from the same block, you could come back here crying on the performance and have people laugh design.

  Rather than the mud things with more java spawning process, you may need to perform these deletions by a single stored procedure with very specific criteria. Then, rather that dealing with the issues of contention, you serialize everything to go as soon as possible and reduce to a minimum the block copy and cancel demand to keep multiuser. Oracle is biased in favor of adding data instead of delete, add will always be potentially more fast-able.

  Think about this: http://jonathanlewis.wordpress.com/2011/04/19/more-cr/

• Invert the colors OFF makes my iPhone 6 to be inverted color after 9.3.0 iOS updated

  Invert the colors Off makes my iPhone 6 to be inverted color after 9.3.1 iOS updated

  my iPhone 6 a negative color after updating iOS 9.3.1. I have to turn on Invert color for making my iPhone to work in normal color.

  Is it a problem in the software update for the night shift?

  Check to see if you have a filter set with zoom. Settings > general > accessibility > Zoom > Zoom filter > No. -AJ

• 'For' loop with a different number of iterations. Second, the auto-indexation of the tables with different sizes is done. It can affect the performance of the Vi?

  Hello

  I have a loop 'for' which can take different number of iterations according to the number of measures that the user wants to do.

  Inside this loop, I'm auto-indexation four different 1 d arrays. This means that the size of the tables will be different in the different phases of the execution of the program (the size will equal the number of measures).

  My question is: the auto-indexation of the tables with different sizes will affect the performance of the program? I think it slows down my Vi...

  Thank you very much.

  My first thought is that the compiler to the LabVIEW actually removes the Matlab node because the outputs are not used.  Once you son upward, LabVIEW must then call Matlab and wait for it to run.  I know from experience, the call of Matlab to run the script is SLOW.  I also recommend to do the math in native LabVIEW.

• Invert the colors in the painting of the black to white?

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• Invert the colors of a graphic object?

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  Original title: invert the selection

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  I think Alt-E-I is also the shortcut for this feature.

• Flip and invert the colors of the selected area - Javascript for Photoshop

  So I am writing a script for Photoshop using Javascript and I a selection I want return vertically and then invert the colors of a layer, but I can't find a command on how to do it.

  Here is what I tried:

  docRef.selection.select(shapeRef)

  docRef.activeArtLayer.Invert()

  docRef.activeArtLayer.flip(Direction.VERTICAL)

  I haven't checked the others your lines, but your invert line should be:

  docRef.activeLayer.invert)

• Tips on optimizing the performance of table.

  Hello

  I read several article on optimizing the performance for the table. Finally, I settle on a strategy to implement, but I have a few questions.

  Let's say we want to display a wide range of data in a table. The number of lines displayed on the screen is n = 25.

  For each VO displayed in table form: Open model project->->->-> Data Model Instances to View object Data Model Module of Application -> select your view object-> press the modify... button-> Tuning

  • For best performance Oracle ADF Performance Tuning Documentation indicates that in lots of field must be set to n + 3
  • The scope of the queryoptimizer indicator should be the value + 3, so if n = 25, FIRST_ROWS_28 FIRST_ROWS_n
  • By default, access is set to Scrollable, which is OK as long as you aren't iteration in a large data set, but if you are, then you must change the Access Mode to the Range Paging
  • Set the size of the beach to n + 3

  Q1: What is the reasonable maximum for a set size? Client wants to display huge table as 200 lines that is not really usable, but it's what they want. I was wondering if the definition of the size of the beach at 203 is a reasonable value, or if it is too high.

  Q2: I have really not understand the purpose of the indicator of QueryOptimizer even after reading the documentation. Is it okay to put it at FIRST_ROWS_203 if your batch size is 203?

  Thank you

  JDev 11.1.2.4

  What version of jdev we are talking about?

  Is the table in paging mode (+ 11.1.1.7)?

  Q1 Yes), the tip is still standing, then set-203. The reason is that the table will display 200 lines that you need to load them in any case. In this case, it is best to load them into a round trip. a smaller rangesize then the number of visible rows in the table means more then 1 trip on the server and the db.

  Q2) the query optimizer indicator is just passed to the db which then decides to use it or not. The indicator shows the db to deliver the first n lines of results as soon as possible. If you have large result sets the db can provide the result set when it comes always collection more data FRO the game results in the background. This will display the fastest page to the user.

  Timo

• Views of repository for the performance table

  Hi all
  
  I found this page
  [http://docs.oracle.com/cd/B19306_01/em.102/b16246/views.htm | http://docs.oracle.com/cd/B19306_01/em.102/b16246/views.htm]
  on Oracle® Enterprise Manager extensibility
  but I can't seem to find what I want.
  
  Can someone tell me one I can find the information that powers the graphics on the performance tab? As "medium-sized active sessions?
  I would like to create a graph of multiple target.
  
  Thank you.
  ARO
  João Pinela.
  
  Published by: Pinela on July 2, 2012 11:19

  I wasn't a link to monitoring views section. Specifically, you do not want to watch the following views:

  MGMT$ METRIC_CURRENT
  MGMT$ METRIC_HOURLY
  MGMT$ METRIC_DAILY

• Suggestions to maximize the performance of loop of RT

  I've attached a screenshot of a small portion of a RT data acquisition and treatment program. This loop treats 1 second blocks of data from a FIFO RT but very rarely (about once per day) the loop is slowing to the point where he is not able to track the data blocks 1 second coming from the producer loop (not shown). Normal loop iteration time is about a half a second, but when he falls behind, iteration rate slows down until almost 2 seconds and does not recover.

  The incoming data for the treatment are an array of 14 waveforms, 102400 each of the samples.

  1 channel is peeled off very early for the treatment of tachometer. For other analog channels, there are a few calibration and light filtering/RMS calculation then the data is sent to an another RT FIFO. Then the analog channels are highly filtered, decimated and sent an FFT / unit conversion/integration VI. The FFT results are transmitted over the network and then checked for overtaking in VI connected to the shared variable of the network 'fireplace data '. Step much more time of the whole process seems to be the wave filter vi form, just after the RT FIFO first write operation.

  I'm looking for suggestions on improving the performance and the deterministic nature of this loop. So far, I've only tried to turn off debugging and reentrant inline, all the vi if the sub vi supports. These measures have helped, but I see the question coming. I'm willing to try anything, so just point out something that does not look quite right. I will be happy to provide more details on one of the vi if this will help.

  I could considerably improve the performance by using the place in the structure of the element for the same vi, calibration and decimation. Then, I replaced all build tables with a subset of spare board. Finally, I have pipelined loop into two distinct stages. Since the target RT uses only one heart, so I don't get a multithreading performance gain, but it seemed a little better job, I don't know why...

• ORA-29874: caution in the performance of routine ODCIINDEXALTER

  Hello

  I'm on Oracle 11.2.0.3

  [code]

  drop table test;

  create table test of xmltype.

  Insert in the test

  values (')

  < employee

  " xmlns: xsi =" http://www.w3.org/2001/XMLSchema-instance "xsi: noNamespaceSchemaLocation =" "> ".

  < location >

  < joiningDate id = "on site" >

  2012 06-18 of < hireDate > < / hireDate >

  < / joiningDate >

  < joiningDate id = "offshore" >

  2011 07-8 < hireDate > < / hireDate >

  < / joiningDate >

  < / location >

  (< / employee > ');

  commit;

  exec ('myprop') DBMS_XMLINDEX.dropParameter;

  CREATE INDEX test_xml_index ON test (OBJECT_VALUE)

  INDEXTYPE IS XDB. PARAMETERS XMLIndex ("test_dates_tab WAY of TABLE");

  BEGIN

  () DBMS_XMLINDEX.registerParameter

  "myprop",.

  ' ADD_GROUP GROUP test_dates

  XMLTable test_dates_tab "/ employee"

  XMLNAMESPACES ("http://www.w3.org/2001/XMLSchema-instance" AS "xsi")

  COLUMNS on the spot date PATH ".//*[@id="onsite"]/hiredate/text ()"

  ');

  END;

  /

  ALTER INDEX SETTINGS ('myprop PARAM') test_xml_index;

  [/ code]

  When I run the alter index below I get the error.

  I'm following the documentation to the Indexation of the XMLType data example 6-20

  [code]

  SQL > test_xml_index ALTER INDEX SETTINGS ('myprop PARAM');

  ALTER INDEX SETTINGS ('myprop PARAM') test_xml_index

  *

  ERROR on line 1:

  ORA-29874: caution in the performance of routine ODCIINDEXALTER

  [/ code]

  ORA-29960: line 1, ORA-02000: lack of keyword

  Hello

  The example you're referring to creates an index informal first, and then add a structured component.

  Unless it's really what you want to do, simply create a structured index directly:

  CREATE INDEX test_xml_index ON test (OBJECT_VALUE)

  INDEXTYPE IS XDB. XMLIndex SETTINGS (q'~)

  Test_dates_tab XMLTable ' / employees '

  COLUMNS on the spot date PATH 'location/joiningDate[@id="onsite"]/hireDate '.

  ~'

  );

  If you want to use two components, and then specify a different XMLTABLE name of the path table.

  See my response here for more tips:

  Re: oracle xml db looking to extract the date year

• How to optimize the performance of this code?

  I have two clips on a flash project. One of them is fixed and the other can be moved with the arrow keys of the keyboard. The two clips have irregular shapes, so HitTestObject and HitTestPoint does not work very well. I have a function that detects the collision of two clips using bitmap. I wanted to update the position of the Movie clip mobile so I put the function of collision detection under the ENTER_FRAME event listener code. It works fine, but when I add many fixed film clips (about 10 clips fixed in an image), the game (.swf file) becomes slower and slows down the performance of the PC. I thought that my collision detection function has a negative effect on the performance of the PC, so I used the class on this page: https://forums.adobe.com/thread/873737
  but the same thing happens.

  You told me how to do to speed up execution of my codes?

  Here's the part of my code:

  stage.addEventListener (Event.ENTER_FRAME, myOnEnterFrame);

  function myOnEnterFrame(event:Event):void

  {

  If (doThisFn) / / doThisFn is a variable to allow or prevent the kind of mobile film clip moved with arrow keys

  {

  If (left & &! right) {}

  Player.x = speed;

  Player.rotation = player.rotation - speed;

  }

  If (right & &! left) {}

  Player.x += speed;

  Player.rotation = player.rotation + speed;

  }

  If (up & &! down) {}

  Player.y = speed;

  }

  If (down & &! up) {}

  Player.y += speed;

  }

  The clips of film sets are wall1, wall2, wall3, wall4,... and so on
  the following code checks to see how many walls exist on each image and pushes them in table wallA

  for (var i: int = 0; i < 1000; i ++) / / you can put up to 1000 object of wall in the table wallA

  {

  If (this ['wall' + i]) / / if the wall object exists, push it into the table wallA

  {

  wallA.push (this, ['wall' + i]);

  }

  }

  for (i = 0; i < wallA.length; i ++)

  {

  If ( h.hitF (player, wallA [i]) | gameOverTest) / / this code checks whether or not the player (the mobile clip) hit the walls

  {

  trace ("second try");

  gameOver.visible = true;

  doThisFn = false;

  }

  }

  I think the following codes are easy to turn and run. I think that the performance problem is due to previous codes.

  
  

  If (player.hitTestObject (door))

  {

  Win.Visible = true;

  doThisFn = false;

  }

  If (key) / / if there is a key on chassis

  {

  If (player.hitTestObject (key))

  {

  Key.Visible = false;

  switch (currentFrame)

  {

  case 4:

  wallA [0] .visible = false;

  .x wallA [0] = 50000;

  break;

  case 5:

  wall14. Play();

  wall8.x = 430;

  break;

  }

  }

  }

  }

  }

  It's a simple question that doesn't usually have a simple answer.

  Here is an excerpt of a book (Flash game development: in a Social, Mobile and 3D world) I wrote.

  Optimization techniques

  Unfortunately, I don't know any way completely satisfactory to organize this information. In what follows, I discuss memory management first with sub-themes listed in alphabetical order. Then I discuss the management of CPU/GPU with subheadings listed in alphabetical order.

  This may sound logical, but at least, there are two problems with this organization.

  1. I don't think it's the most useful way to organize this information.

  2. memory management affects the CPU/GPU use, so that everything in the section of memory management can also be listed in the section CPU/GPU.

  In any case, I'll also list information in two other ways, from the easiest to the most difficult to implement and more for much less.

  Two of these later inscriptions are subjective and dependent on experience developer and capabilities, as well as environmental test and the test situation. I very much doubt there would be a consensus on the order of these lists.  However, I think that they are still valid.

  Easier to the more difficult to implement

  1. do not use the filters.

  2. always use the reverse for loops and avoid loops and avoid while loops.

  3. explicitly stop timers for their loan for gc (garbage collection).

  4. use the weak event listeners and remove headphones.

  5. strictly type variable when possible.

  6. explicitly disable interactivity mouse when interactivity smile not necessary.

  7. replace dispatchEvents with callback functions whenever possible.

  8 it would be gc stop sounds for the sounds and SoundChannels.

  9. use the DisplayObject most basic need.

  10. always use cacheAsBitmap and cacheAsBitmapMatrix with air applications (i.e., mobile).

  11. reuse of objects when possible.

  12 Event.ENTER_FRAME loops: use different listeners and different listener functions applied to DisplayObjects as little as possible.

  13. the pool instead of creating objects and gc objects ' ing.

  14. use partial blitting.

  15. use step blitting.

  16 use Stage3D

  Biggest advantage less

  1. Use the blitting Stadium (if there is enough memory system).
  2. Use Stage3D.
  3. Use partial blitting.
  4. Use cacheAsBitmap and cacheAsBitmapMatrix with mobile devices.
  5. Disable explicitly interactivity mouse when interactivity smile not necessary.
  6. Do not use filters.
  7. Use the most basic necessary DisplayObject.
  8. Reuse objects whenever possible.
  9. Event.ENTER_FRAME loops: use different listeners and different listener functions applied to DisplayObjects as little as possible.
  10. Use reverse for loops and avoid the do loops and while loops.
  11. The pool instead of creating objects and gc'ing.
  12. Strictly, type variable when possible.
  13. Use weak event listeners and remove headphones.
  14. Replace dispatchEvents by the callback functions whenever possible.
  15. Explicitly stop timers on loan for the gc.

  16 stop sounds for the sounds and SoundChannels be gc would be.

• Increase the performance of pl/sql delete

  version: 10g

  Hi all

  Help me please by increasing the performance of the code below,

  The code below takes about 10 min for deletion in 80 tables he recovered. Each table it does not remove more than 50,000 thousands

  Is there another way I can increase the performance of the below.

  I thought to delete forall, but I don't think its useful in this context.

  DECLARE

  v_num_2 PLS_INTEGER: = 50000;

  BEGIN

  THE C1

  (SELECT master: '.) '       || table_name table_name

  From all_tables owner WHERE = 'ARCHIVE' AND num_rows > 0 ORDER BY table_name

  )

  LOOP

  BEGIN

  EXECUTE IMMEDIATE 'remove'. C1.table_name |

  "where arch_ts < (sysdate-530) and rownum < =' | ' v_num_2;

  END LOOP;

  END;

  Thanks in advance

  Without asking what purpose your code is used:

  You can enable parallel DML and add a hint of parallel to your delete statement.

  Something like (not tested, but you'll get the idea):

  Start

  immediate 'alter session enable dml parallel. "

  --

  C1 in (select master: '.) ' || table_name table_name

  from all_tables

  where owner = "ARCHIVE".

  and num_rows > 0

  -order of table_name<-- not="" really="" needed,="" is="">

  )

  loop

  Start

  run immediately "remove / * + parallel (t 4) * / ' |"

  'from' | C1.table_name | |' t ' |

  "where arch_ts".< (sysdate-530)="">

  'and rownum '.<= 50000="">

  end loop;

  --

  immediate "alter session disable dml" parallel execution

  end;

  /

  You can test with different values for the declaration of principles (degree of parallelism), 4 in the index and find the optimal value.