cache memory buffer cache vs. data blocks which can be

Similar Questions

• Is there a function in LabVIEW that takes the last half of the data (table) which can then be used for the analysis?

  I was wondering if there was something in this direction in LabVIEW to create a shortcut for this, rather than try to hardcode it after the fact. Does anyone know this method I'm talking about? (IEC 60601-2-24 dry 50) Please let me know because I'm fighting here.

  Mark.Eckhoff wrote:

  I have to calculate the index and the length after the fact. I just hope that there may be a simpler solution.

  Well, you can reduce the complexity of the half by computing only the "index" and leave the 'length' of "subset of the table" unwired. If you wire length, the subset is the rest of the table.

  There are also "split table 1 d.

  If it's still too hard, do it once and wrap it in a sub - VI, called for example "SecondHalf1D.VI". Of course, you probably also need a logical deal with cases where the size of the array is not an even number.

• Recover data block

  To do ETL, I truncate tables, then insert directly the data every day. Direct use only the new blocks.

  Delete or truncate operation reclaim block which can be used by direct insertion?

  Cheney Shue says:

  To do ETL, I truncate tables, then insert directly the data every day. Direct use only the new blocks.

  Delete or truncate operation reclaim block which can be used by direct insertion?

  Truncated, the default resets the leash of the high water and releases storage allocated back to Oracle to be reused.

  See the doc of SQL language

  TRUNCATE TABLE

  Use of the TRUNCATE TABLE statement to remove all rows from a table. By default, Oracle database also performs the following tasks:

  • Free all space used by the deleted lines except that specified by the MINEXTENTS parameter storage
  • Sets the NEXT parameter of storage to the size of the last extent removed from the segment by the truncation process

  If you reload the table with about the same amount of data each day (for example the daily charges), you generally use the REUSE STORAGE clause. Which improves performance because Oracle does not release allocated space, but reuses for the new charge.

  Specify reuse STORAGE REUSE STORAGE to keep the amount of space between the deleted rows allocated to the table. Storage values are not reset to the values when the table or cluster was created. This space can subsequently by the new data in the table or cluster resulting from insert or update operations. This clause leaves storage parameters at their current settings.

• Reg: Buff v/s data Cache area Shared Sql

  Hi Experts,
  
  I had a doubt about the Oracle architecture.
  
  When a query is triggered, and then it checks whether the same is present in the area of SQL shared of the shared pool.
  In addition, it is said That Database Buffer Cache stores recently used data blocks for faster recovery (of frequently used data).
  Please correct me if I'm wrong.
  
  Now, I get exactly the goal difference of two. Seems the same.
  I read the articles of the Oracle documentation.
  
  Pointers on this?
  
  Thank you and best regards,
  Nordine Bolduc

  ranitB wrote:
  Hi Experts,

  I had a doubt about the Oracle architecture.

  When a query is triggered, and then it checks whether the same is present in the area of SQL shared of the shared pool.
  In addition, it is said That Database Buffer Cache stores recently used data blocks for faster recovery (of frequently used data).
  Please correct me if I'm wrong.

  Now, I get exactly the goal difference of two. Seems the same.
  I read the articles of the Oracle documentation.

  You answered you. The shared pool contains areas of memory that contain the sql code optimized for the treatment but not the data. The data for the same cursor will be available in the cache buffers data . Store the data in the buffer cache would reduce e physics / s for later execution and fetch the same data.

  HTH
  Aman...

• Question about data block address (DBA)

  Hi all
  
  The disk block has its own s/n (data block address) and when it is read into the buffer cache, he has a memory address (I'm just guessing).
  If my assumption is correct, the DBA and memory address have any relationship, i.e. a mechinsm of mapping?
  
  Best regards
  Leon

  Laughing out loud
  There is NO relationship between the address of a block on the disk (the file / block number) and address when it is in memory. Keep in mind, first, that there could be several copies a block of memory.

  By 'relationship', I mean that you can not say "because this block disk address is X the memory address is there.
  There is a relationship between the address block and 'cache buffers chain' that the block will be associated with - and that's how Oracle knows how to find the block of memory, he knows what channel it should be, so he goes to the beginning of the relevant channel and starts walking he controls each link in the chain for the right version of the block on the right. (The string is a list of related entries of x$ bh, of course, not a linked list of actual copies of blocks).

  Concerning
  Jonathan Lewis

• Combining a circular buffer with dynamic data

  Hello

  I am trying to save data in a test that surrounds an impact event to determine the period during which the acceleration passes a certain threshold. I want to record a second of data before and after the event occurs, I put the threshold crossing. The duration will be about 10-15 ms, so two seconds of data at 10 kHz will be a lot of data. I have my VI written so far to export the data from the buffer to an excel file, but is it possible that I could record an extra second of data and it concatenate into what I already have? I usually use the express VI of data collection for dynamic data collection and report generation specific excel live for static data, but how could combine the two?

  Any kind of conceptual thinking would be much appreciated.

  Thank you!

  What I've done in the past, is to use a queue of fixed size with the queue with loss to store data (is like a circular buffer).  Then, when the threshold is detected, recording a 1 second.  Your queue should now have 2 seconds of stored data that you can then write just to your file (use the status of the queue to get data without emptying the queue).

• The ITV player / You Tube keeps in memory buffer and sound cut since I have done a Windows Update. How can I fix?

  I did a Windows Update on my XP

  The ITV player / You Tube keeps in memory buffer and sound cut since I have done a Windows Update. How can I fix?

  What is the speed of internet connection?

  http://www.Speedtest.NET/

  Don't make sure that no firewall or internet security thing trying to block streaming.

  Install the latest version of Adobe Flash Player: -.

  http://get.Adobe.com/flashplayer/

• Data block don't request when the Web is not displayed

  Hi, I had problems questioning a block master / detail. I have 1 master block which has 7 blocks of retail.

  the main block and 4 blocks of retail are Canvas1.

  3 of these blocks of detail are in separate paintings (canvas 2, 3, 4)

  I have then 3 Summary canvas1 items that show the sum of columns into blocks of 2, 3, 4.

  (summ2, summ3, summ4)

  Whenever I run EXECUTE_QUERY, it shows the details of the blocks 4 detail.

  but for summ2, summ3, summ4. It shows 0.

  I have to click the button submit once again just so he could question him again.

  no idea why this is happening?

  Thank you!

  Hello

  If I have your correct case, Pls, try using QUESTION after Trigger - level of the form

  You can use the u code used in your button with some changes by following the steps...

  BEGIN

  ....

  DECLARE

  SELECT...

  IN: summ2

  Of

  WHERE...;

  EXCEPTION

  WHEN NO_DATA_FOUND THEN ("no data found for summary2");

  END;

  SET_RECORD_PROPERTY(:SYSTEM.TRIGGER_RECORD, :SYSTEM.TRIGGER_BLOCK, STATUS, QUERY_STATUS);

  Amatu Allah.

• Verizon Palm Centro with data block incoming picture message issue

  My wife & I have Verizon Palm Centro.  We have a data block on the account that we only wanted to fuse our PDA with our phone to carry less devices.  Recently, someone she knew sent him a picture message.  She never received as to be expected since we have a block of data.  BUT now his phone constantly freezes and will not allow her to put it to sleep.  I noticed that when he behaved in this way, there are two icons triangle above the antenna meter chart, which mean the transfer of data (they go gray and then become green and grey).
   
  To try to remedy the situation, I did a soft reset.  One more question.  Did a Hard Reset.  One more question.  She took it to the Verizon store.  They said he had no trouble finding.  Has continued to be a problem.  Then I saw on the Palm site there is an upgrade of the operating system.  Done (which includes some reset hard).  One more question.  The next day, my wife returned to the Verizon store.  This time, they saw the issue.  They said there was nothing they could do, but give him a new phone.  She brings the phone home and same problem.  I then HotSync had to get all its data back on the phone.
   
  Now, I get a little concerned, as it has been 5 days since the beginning of the question.  As this problem happening my wife tells me of the picture message sent him these days ago.  While it's a data connection, I opened the message Centre and there is an icon of mail with arrows to move through it stay at 0%.  When that disappears, the triangle icons disappear from the graph of power antenna.
   
  I call the technical assistance.  The person is very and said we should would never block because someone should only get this phone for data.  I explained that we wanted only to combine devices.  I explained the picture message. blah blah blah.  He then says that it is from a software on the phone.  Takes me through a bunch of read him information.  All the time that he does not believe me that it's something to do with the unrecovered MMS (which we do not want yet).  In any case, it is more than an hour on the phone with the guy.  It had Palm on instant message and at the back of their hand for me.  He then tells me to do a Hard Reset.  I told her that I've already done a lot and it was not the solution.  I had to do because it could it resolve, he said.  I did, and for the next few minutes, it doesn't lock upwards with the icons.  That is why he said it was fixed and it was something we did on the phone.  Then, he wanted to end the call.  As he was not driving, I ended the call.
   
  Well..................  I did a restore complete everything on the phone my wife, starting by a Safe Hotsync for his calendar, list of tasks and addresses.  Then I restored one - by - one all of his requests including its Documents to go files, etc..  It took another hour +.  The phone worked ok for some time and now 1 day later... The same thing is happening again.
   
  Is there a way to stop this madness?  Verizon can't kill what is trying to get out?  Is there something in the Palm that can kill the message?  Any help would be great.

  PS Our phones have the same exact software on them with the same applications, provided with the phone and the modules provided by Verizon/Palm.  We have the same ringtones.  We have the same content of music on our MicroSD cards.  The only thing different is photos we have taken.  My phone doesn't have this problem.  The only difference is that picture stupid someone message.  Hopefully, it's not mine.  Thanks again.

  Thank you very much for the reply.  After that I posted this, I contacted Verizon Technical Support.  It seems that the problem was exactly what I said it was.  There was a picture message which was held by the data block, but still somehow try to get on the phone.  I spent some time with a very competent tech person who took the time to solve the problems with me (and down tell me).  We tried to remove the block to see if the message would come through.  Still problem.  We went through all kinds of things to reprogram and realign the phone to the Verizon network.  Still problem.  Then he looked again and found a setting in the application of message for MMS messages fired automatically.  When I disabled this setting, bam message came (no picture because of the block) and the problem stopped.  I was very pleased with the help and the phone my wife is no problem.

  P.S., while my wife & I have the same contacts this is a manual process to keep the same.  We have different identifiers of Palm.  Our devices are different.  The only reason why I mentioned in my original post how we hae the inforamtion even had to point out that his phone was screwing and mine was not (with essentially the same content).  Once again, thank you.  G

  Message relates to: Centro (Verizon)

• The values for the items in the list of the other data blocks appear not when running.

  Hello

  I have a new problem again.

  I'm a new form in which there is about 8 blocks. All blocks have their tables in the oracle database.

  Each block has 18 columns with the same column and the column names. But the values in these columns are different and do not match.

  The problem is while I sign the form, it fills only the first data block. Other blocks do not display or fill in the values.

  I can't create a master relationship because all column values are different.

  How show or fill in the values of all the tables?

  Please help me. Thank you.

  Hello

  If your form has really separated tables, then you can simply use a trigger key-exeqry at the level of forms of travel in each block in turn and perform a built-in query execute, eventually returned the starting block.

  That is to say

  go_block('..');

  execute_query;

  go_block('..');

  execute_query;

  etc.

  go_item (...);

  In this case, you would use the block where clause to constrain each table for the game proper.

  If, however, the database has no relationship between the tables, but the content of the data has a correlation, then you could create a relationship of forms manually.

  see you soon

  Stem

• Data block corruption?

  Hi all
  
  OraDB 11.2.0.1
  
  Today, we just met this error in oue PROD db. It is the first time that we have achieved this.

  Caused by: java.sql.SQLException: ORA-01578: ORACLE data block corrupted (file #
  5, block # 136230)
  ORA-01110: data file 5: 'C:\ORACLE\ORADATA\ORAJVB7\DATATS01.DBF'
  ORA-26040: Data block was loaded using the NOLOGGING option

  My boss ask you what are the usual cause of this issue.
  I just said, fluctuations in the power supply and the drive is already old and fragile.
  It presents a valid explanation?
  
  How do you handle this issue?
  The FF is also acceptable?
  
  startup nomount
  recover the database.
  
  
  Thank you very much
  
  Edited by: KinsaKaUy? on July 18, 2012 20:19

  KinsaKaUy? wrote:
  Thank you...

  I just thought that 11.2.0.1 is now the high-tech modern database and it has a utility to repair the damaged data. Something like fix DBMS exec (Corrupt block). And presto! corruption will be gone.
  Why is that the process is still primitive :(

  Corruption would be gone on that the storage on which the Oracle block is sitting, would be free of him. If you have a defective material, can not expect Oracle to heal for you, right?

  Aman...

• Constantly changing data blocks

  Hello
  If the data blocks in the buffer constantly updated such that they never reach the list less used of LRU, then when they will be written on the disc?

  To ensure that DBWR writing all updated the pads the following is appropriate:

  1 STOP (NORMAL or IMMEDIATE)
  2 ALTER DATABASE BEGIN BACKUP
  3. CHANGE THE SYSTEM CHECKPOINT
  4. ALTER SYSTEM SWITCH LOGFILE - Modified written DBWR buffers "lazily", so the order is returned, before even that all modified buffers are written to disk
  5 ALTER TABLESPACE BEGIN BACKUP - only Tablespace tbsname is controlled, not the whole instance
  6 DELETE or TRUNCATE the table - only buffers of the table (and index) are controlled
  7 checkpoint segment emitted by a parallel query - only segment buffers are controlled
  8. control initiated by direct route segment point series read implemented at level 11 g - only segment buffers are controlled (see URL later added by Joel (jgarry) in the comments)

  Hemant K Collette

  Published by: Hemant K grapple on January 11, 2011 11:13

• How to record data block details without validation data?

  Hi all.
  I have a form - forms 6i - contains three blocks of data DB1 h1 ^(form/master) ^ <-DB2 ^ (in the form of table/main/detail) ^ <-DB3 ^(tabular/detail) ^
  
  There are certain mandatory elements in DB1, which must be entered.
  user first enter data DB1 then go to DB2 - master DB1, DB2 in detail.
  in normal when insert us a new record in the detail data block and move the cursor to the next element form will ask for validation. I solve this problem by engaging if the status in new or modified data block, that is the problem because there are certain elements is required in DB1, so if the user leave them empty and fill the tabular data block DB3 form will commit and the requested item will be stored as null in the database.
  
  so, how can I save the data in DB2 and DB3 temporally to the form so that the form won't ask for validation when the cursor will move to the other element?
  If Yes, then I can do a procedure which ensure that all the necessary filed came before committing.
  Thank you

  To be very honest, I'm still confused what you want to do. But the thing in the last post asked you then read on the POST in the help of forms...

  Integrated POST

  Writes data into the form in the database, but does not perform data validation. Oracle Forms valid first form. If there are changes to publish on the database, for each block in the form of what oracle Forms written deletions, insertions and updates the database. All the data that you send to the database is committed to the database of the next COMMIT_FORM that runs when the session Runform. In addition, these data can be restored by the next CLEAR_FORM.

  -Clément

• Reading excel data file in Oracle form data blocks

  Hi all
  
  I want to read the data from the excel file in the data block of the module of the form. There are many resources available that explain how to put the data in oracle forms in the excel sheet, but I can't find a single resource to achieve this functionality. Can someone please help me get around this problem. Any help will be much appreciated.
  
  Thanks in advance
  Bilal

  Bilal,.
  There is little documentation available through My Oracle Support, which shows how to read an Excel file in a form, but you need a support contract with Oracle to access the document (how to read data from an EXCEL worksheet in a form using WebUtil Client_OLE2 [813535.1 ID]).

  I've seen this issue come up in the forum from time to time, so I wrote a small form demo which illustrates playback in Excel in a form. Discover forms: how to read an Excel file in a form. This demonstration uses the WebUtil library, so you must make sure have WebUtil correctly configured in the Forms Designer, as well as on your application server.

  Hope this helps,
  Craig B-)

  If someone useful or appropriate, please mark accordingly.

• The button toggle based on condition for a data block

  I have a data block with elements like student, student, DOB name card (all are text elements) and view (push button).
  I'm getting 100 records and it generates 100 lines and push button for each line that matches. Now, I want to turn the push button, based on the DOB. If a student < 10 DOB I won't allow them to view their profile. How to limit the age of the student?
  Thank you.

  Hello Chris,
  There are two ways to do this. A way to toggle the button (which I don't like)
  1 way.
  1 create a trigger on called a TIME-NEW-RECORD-INSTANCE at the block level and use the code like this...

  IF MONTHS_BETWEEN(SYSDATE,:DATE_OF_BIRTH)/12 < 10 THEN
    SET_ITEM_PROPERTY('BUTTON_NAME',ENABLED,PROPERTY_FALSE);
  ELSE
    SET_ITEM_PROPERTY('BUTTON_NAME',ENABLED,PROPERTY_TRUE);
  END IF;
  

  2nd way
  I prefer to use to restrict the button itself. I mean, that's when the user will press the button then show him the message otherwise call form etc. as...
  1. the trigger WHEN BUTTON PRESSED, use code like this...

  IF MONTHS_BETWEEN(SYSDATE,:DATE_OF_BIRTH)/12 < 10 THEN
    MESSAGE('Not allowed to view profile.');
    MESSAGE('Not allowed to view profile.');
    RAISE FORM_TRIGGER_FAILURE;
  ELSE
    -- Do something here / call form...
  END IF;
  

  -Clément