Speed of table.

Similar Questions

• need help with the Merge statement

  I'm on: Oracle Database 11 g Enterprise Edition Release 11.2.0.2.0 - 64 bit Production
  
  I'm currently an UPDATE statement and then it works and is accurate, it takes 30 minutes. I heard that MERGE
  can do the same thing and is just as accurate and much faster!
  
  Here's the query I want to convert into a MERGE INTO statement. I tried to do it myself, but I get errors and don't know simply, since it's new for me.
  
  Basically I want to update table your on a corresponding condition in the table tt for 2 columns (GTP and UPDATE_DT), for UPDATE_DT I want to insert the Date current system.
  

  UPDATE /*+ PARALLEL (16) */  OLDER_Table ta
  
  SET (ta.GTP, ta.UPDATE_DT) = 
  
                  (SELECT /*+ PARALLEL (16) */ tt.GTP, SYSDATE
                   FROM NEWER_Table tt
                   WHERE ta.cust_id = tt.cust_id
                   AND ta.STAMP_DATE = tt.STAMP_DATE
                   AND ROWNUM = 1)
  
                   WHERE EXISTS (SELECT 1
                                 FROM NEWER_Table tt
                                 WHERE ta.cust_id = tt.cust_id
                                 AND ta.STAMP_DATE = tt.STAMP_DATE
                                 AND (NVL(ta.GTP, 'X') != NVL(tt.GTP, 'X'))); 

  Thank you!

  Hello

  Whenever you have a problem, please post a small example of data (CREATE TABLE and only relevant columns, INSERT statements) of all of the tables involved.
  Also post the results you want from this data, as well as an explanation of how you get these results from these data, with specific examples.
  If you ask on a DML statement, such as UPDATE, CREATE TABLE and INSERT statements need to re - create the tables as they are before the DML, and results will be the content of the or the tables changed when it's all over.
  See the FAQ forum {message identifier: = 9360002}

  MERGE peut be much faster than update; Sometimes, there is no significant difference in speed.
  Tables in multiple situations like this, I've never seen a case where the MERGER has been slower than the UPDATE, even if the UPDATE is sometimes easier to code and just as fast.

  Maybe that's what you want:

  MERGE INTO  older_table            dst
  USING  (
             SELECT  n.cust_id
          ,        n.stamp_date
          ,        n.gtp
          ,        ROW_NUMBER () OVER ( PARTITION BY  n.cust_id
                                             ,           n.stamp_date
                           ORDER BY      n.gtp
                            )                    AS r_num
          FROM        newer_table  n
          JOIN        older_table     o  ON   n.cust_id     = o.cust_id
                               AND     n.stamp_date     = o.stamp_date
                         AND     NVL ( n.gtp
                                  , 'X'
                               )          != NVL ( o.gtp
                                                , 'X'
                                            )
  
         )                 src
  ON     (    src.cust_id            = dst.cust_id
         AND  src.stamp_date     = dst.stamp_date
         AND  src.r_num            = 1
         )
  WHEN MATCHED THEN UPDATE
  SET    dst.gtp          = src.gtp
  ,      dst.update_date     = SYSDATE
  ;
  

  As I can't test it, I can't be sure.

• I'm reading the data (speed rate and flow) of a table and it plot in a graph.

  I'm reading the data (speed rate and flow) of a table and it plot in a graph. I need to draw two values of l/min (speed) to the same speed. How can I do using a loop for?

  There is no need actually to use a loop FOR this. And using a graphic waveform isn't the type of field for this, for a waveform you a (Start), the dT T0 (greatness not) and table D (Data), this isn't what you want unless you know precisely the measure will take place according to an orderly disposal, you'd want a xy chart so that you can trace the measures where they occur in the axes X and Y of preference.

  

• Sorting the rows in the table based on the first character - speed-problem

  Hello

  I have a text file with a lot of lines. The file is imported into LV, and must be sorted by the first character.

  It works very well, but gets very slow lines if too.

  If 40,000 lines then take 0. 2 s.

  If 400,000 lines then the time rises with factor 100 in 25 years.

  If 1,000,000 lines then the weather is dry 222 (~ 4 min)

  Attached is the code which sorts a table to text.

  The number of lines can be set with the meter of the loop (Loop-counter * 4 = NumberOfLines)

  The elapsed time is displayed.

  How to speed this up? (Or check the more linear time number of rows)

  Thank you

  

  You can try something like that. If you treat a table line by line, you end up taking a lot of time.

  

  Sorry I have a problem of fixing of the VI.

• soon more fast faster. Comparison of speed of dim v.s. table 1 object dict.

  LS,

  I'm working on an application with a large number of clips.

  IM using a Dictionary object to keep track of what's where on x, y coords.

  The function using this object is made very frequent.

  that is to say:

  var name: string = x + y;

  If (mycoord [name] content == true) etc.

  Howmuch would be the speed improve if I flattened everything down to a 1 table dim.

  Then using a calculation calculate the coords array index.

  Or simpler put: does anyone know the dictionary speed v.s. a single Bay Sun?

  Kind regards

  Mac

  Hi K... glad to hear u

  I test.

  I can tell you that it is much faster!

  I guess the Dictionary object to axe the name before you store and retrieve. Calcs so more then 2 multiply.

  Also... before every store and retrieve the you do a string for the name concat.

  I am so happy. the app has been grinding to a halt.

  After the change, he now runs thryptophane again.

  IM if happy... im going to mark myself as the right answer... don't know if that counts... but this is not what counts here =)

  Kind regards

  Mac

• generate the search pages the tables and forms using templates speed

  Hello
  
  I have a table-form page and would like to have a quick search on two windows. Currently, I'm copying the form of generated code page jspx table on page jspx form to achieve. Speed models can be modified to allow this? I looked at the formGroup.vm and the searchArea.vm, but the below lines
  
  If ($JHS.current.pageComponent.hasSearchArea)
  if(${JHS.) Current.Group.generateSearchAreaInRegion})
  
  seem to be stumble me...
  
  We develop in JDev 10.1.3.4 and JHeadstart 10.1.3.3.88
  
  Thank you!
  
  Lana

  Lana,

  You can make a custom searchArea.vm and a custom formGroup.vm model where you uncheck the box for #if ($JHS.current.pageComponent.hasSearchArea)

  You will then get a search box in the table and the page of the form.

  Steven Davelaar,
  Jheadstart team.

• How to speed up sqlldr import of a materialized view's base table

  Hi all
  
  We have a large base on a warehouse system table.
  
  We charge this table periodically by using SQL * Loader.
  
  The charges are generally 30 minutes and its supported. Recently, we have created a materialized view using this table as a table base (and his newspaper correspondents materialized view) mode to REFRESH FAST .
  
  Now we see that expenses will take much longer muuuch.
  
  We created the view as the ISC documentation, using COUNT (*) columns and refresh mode seems to work. BUT, why is it so slow? Is it possible to speed it up?
  
  Thank you in advance.
  
  
  Mariano
  Spain

  Hello

  You have all the nonunique indexes or indexes on base tables bitmap? If Yes, you can consider disabling or setting their USUSABLE, and rebuild them after charge, you can also consider using PARALLEL INDICATOR your query mview to speed up, but you need to test this on your system with suitable parallel degrees (No. = 2 CPU, parallel = 2).

  The amount of data you load?
  Is the partitioned table, if so, then what system is used?
  Have you considered materialized view partitioning and using PCT (track changes of partition) to refresh loaded recently loaded partition? the amount of data you have in this table?

  Concerning

• Speeding Up load table of Excel Subvi

  Hello

  I have a Subvi, which charge a double table 2D from an Excel file. Currently, it takes about 500 ms between executions do not cause an error of type variant, something to do with everything opened and closed. I was wondering if someone could see something obvious is it slows down. If you could help me optimize it a little it would be great. Even if I could shave up to 200ms.

  Here is a small example of what I'm talking about.  Placing the reference App open/close outside the loop gets you down to about 300 ms.

• How to speed up the handling of the table

  I need to generate two arrays of samples up to 20 million to simulate a quadrature encoder signals. I start with a table of examples of position and for each sample, I create a table with the representation of a single pulse and insert it in the table final as many times as necessary. I tried to optimize this code in many ways (using "replace subsets of the table" instead of "insert into tables" and leaving as much code as possible out of the loop FOR), but it is always very slow to run (it takes about 15 minutes just to treat about 10% overall on an i5 machine).

  Is there a faster way to handle this table? I read somewhere that "insert into tables" should not be used inside a loop, but when I initialize an array with the total number of samples and use instead "replace subsets of table" to insert samples execution gets even slower.

  See you soon

  
  

• Model aggregation tables to speed up queries

  Hello
  Can someone help me in the topics
  "Tables of aggregation model to accelerate the processing of applications.
  'Model Partitions and Fragments to improve ease of use and performance of applications '.
  
  Am new to this concept, have not worked on it before.
  
  Kind regards
  Arun

  Hi Arun,

  There are some good articles on overall awareness / overall persistence in OBIEE, check here:

  http://obiee101.blogspot.com/2008/11/OBIEE-making-it-aggregate-aware.html
  and here
  http://obiee101.blogspot.com/2008/11/OBIEE-aggregate-persistence-Wizard.html

  Also check Oracle documentation (obviously).

  For Fragmentation, once again see this blog on how to:
  http://108obiee.blogspot.com/2009/01/fragmentation-in-OBIEE.html
  and
  http://gerardnico.com/wiki/dat/OBIEE/fragmentation

  Let us know about specific questions after reading these links above.
  See you soon
  Alastair

• delete all the records in a table, the speed of insertion is not change.

  I have an empty table, and I insert a record need 100ms.
  During this table a 40,0000 trace, I insert a record need 1 s, it's ok, because I need to make a comparison according to an index before inserting a record need, so more record, more time.
  The problem is when I delete all the record in this table, the insertion time is always 1s, not reduce to 100ms. Why?

  Hello

  Read this part of the oracle documentation

  http://download.Oracle.com/docs/CD/B19306_01/server.102/b14220/logical.htm#CNCPT004

  The reason is always 1s, because when you inserted 400ko record as HWM (high tide is the border between old and new space in a segment.) moved to the top. And when you remove all records of your HWM still in the same coordinate system and that you have not reset to 0. So when you insert 1 it save free space and after finding faces (usually a regular insertions got 6 steps it inserts data). If you truncate your table you and try it again it will be faster that your HWM is reset to 0.

  Concerning

• How to speed up my MBP incredibly slow

  MBP Late 11, 4gigs ram, 250 GB free on the hard drive.  Recently, it has been slow at the point of being unusable.

  Internet use has become if slow I was just using my phone for most things, (I HATE to use phones).  YouTube passes like a minute just to play a video.  Simply scroll a page is on a 5-10 second delay.

  Can I use is no longer my music composing/recording of the programs at all. Sessions created on the MBP now play back slow and jerky.  It's particularly frustrating for me due to the fact that it is the main reason I bought it.

  I know I could get more ram, or other improvements of equipment, but the $ isn't here and I just want to run around like he did with the same characteristics.

  The only thing that may or may not be a clue (I know at least that it is some kind of issue) is when I restart or stop a window appears asking you if I want to continue the installation of some programs, I can't understand.

  Virus, perhaps?  Malware?

  in any way, any help or advice will be greatly appreciated, or this thing must soon become a $1500 table stabilizer.

  Thanks in advance.

  Reset the SMC could solve the problem.

  Reset the management system (SCM) controller on your Mac - Apple Support

  Better add you more RAM, replace the HDD with SSD to speed up your MacBook Pro.

• Recording on DVD - "Unable to retrieve the table of contents" error

  Hi all

  Whenever I try to record on a DVD a face "could not retrieve the table of contents.

  I tried to change the recording speed, but no use.

  When I go to properties of DVD and click on activate record it does not recognize the DVD or any CD in the drive.

  Please help

  Hello

  1. what software to use to burn cd/dvd discs? Try using Nero, Ashampoo burning studio, alcohol CD and DVD software of engraving,
  2. then, I advise you to use high quality as TDK or Verbatim media.

  3
  Go to Device Manager and remove the drive from the list of devices CD/DVD.
  Then access the registry and delete the Upperfilters and Lowerfilters completely from the following registry key values:

  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class {4D36E965-E325-11CE-BFC1-08002BE10318}

  Reboot the laptop and wait for the CD/DVD drive would appear once again

  If your problems persist, there may be a problem with your cd/DVD-ROM

• Satellite Pro P100 GPU Fan off or full speed after updating the Bios to 4.20

  Hello

  After installing the "nine" update Bios 4.20 the GPU fan is when the laptop is cool. While working with him the GPU temperature increases up to 100 ° C (very hot), then the fan starts to run at medium speed and the GPU is cooled. After a restart, for example. the next day, the fan still works on the average speed or high (very noisy). With the bios version before this problem appeared.

  Someone at - it the same problem with his laptop?
  Someone there done the update of the Bios before 4.20 and can send it to me?

  Welcome them
  Rommulaner

  Hi guys

  May I ask which graphics drivers are you using?
  If you n t use the original graphic driver on the site of Toshiba and the laptop can starts overheating. Non - Toshiba GPU led don t support protection against overheating as the drivers of Toshiba! If the temperature of the GPU would rise to a higher level, then the pilot would diminish GPU performance to reduce the heat.
  Drivers graphic non-Toshiba don t control it and therefore the GPU could produce more heat.

  Another reason for this problem could be changed to value of table fan.
  I think that the cooling modules run faster and more often because the table fan has been changed in the BIOS. It may be necessary to prevent the overheating of the material.

  Concerning

• Satellite Pro U300 PSU31E - two how to adjust the fan speed

  While using the laptop the fan comes in for a few seconds and then stops again, which causes the temperature
  increase... what makes the fan?
  Throttle upward rather than stay in a slow to medium status.

  I'm running Vista Business, but I did ' t find the parameters in this regard.

  In the ACPI BIOS is not accessible, but as already posted my problem looks a bit like this:

  Re: ACPI fan on Satellite L30
  Posted the: 13-Sep-2007 22:08 reply

  The fan goes in cycles like this:
  ------------------
  Less than 50, fan
  When > 55, fan to full
  When< 55,="" fan="" on="">
  When< 50,="" fan="" off="">
  and it continues

  ------------------

  It would be much better than when he went to more than 50 years she just spend on bass, then
  It would never reach 55 and never go up.
  And the laptop would be 100 x more silent.

  Another thing: the Germany from Toshiba support page won't load at all or is the global page
  very slow, using different locations and conections. That I can not retrieve all the information to help me.
  And I do not think the University backbone or my DSL 6 Mbps at home is the problem

  Hello

  The fans begin to turn only if a certain temperature point has been reached.
  These fan table information is stored in the BIOS and cannot be changed.

  Some computers laptops satellite supports an additional option in the Toshiba HWSetup. It allows to change the CPU dynamically switchable or always low frequency mode.
  This would set the temperature to a lower level and the fans would lead occasionally.

  In any case, to my knowledge, this option is not available in the Toshiba HWSetup and not in the BIOS so I guess that it s not possible to control fan behavior.

  By the way; If you wish, you can test a tool like aSpeedFanfreeware.
  This program can control the speed of the fans according to the temperatures of the system.
  Maybe it will work on your Satellite Pro U300

  Good bye