level of Rollback statement and 2PC/2PL

Similar Questions

• Level of the Rollback statement and 2PL/3PL

  Mr President
  
  I'm very big thing back to oracle db but confused here:
  
  Level in oracle Rollback statement says:
  
  (1) If a single LMD fails while executing this single statement is rolled back.
  
  (2) the oracle server implements a default backup point.
  
  (3) all other changes are preserved.
  
  (4) the user has to interrupt transactions explicitly by executing a statement commit or rollback.
  
  issues related to the:
  
  ............. (1) assumes that I have a transaction T1, T2... TN.
  
  Obviously T1 starts with begin and ends to commit / rollback. It may look like:

   
  begins
  .............
  some DML statements
  
  commit / rollback.

  the same for the T2, T3,..., TN.
  
  Let say for transaction Ti a DML said update statement fails for bad network link.what will happen next?
  
  If my interpretation is not bad:
  
  A lock will run on the resources.and she will invest in the last commit point.
  
  but, according to the statement (what our faculty of WDP o interpreted) level restoration it will commit to the last well played DML when the central database server crashed eg.what occur if you restart your computer during an operation to copy - paste.If it's true how oracle ensures consistency? because the other site that can not get network connection, won't the other transaction state.
  
  Please comment on this and clear my doubt.

  Hello

  No boy, you don't understand, if you the transaction faces one of the dynamic DDL statements - then implicit validation occurs (it is the case that I referred)

  HTH

  -Pavan Kumar N

• Invalid Application State and functionality appeared not

  Hi all

  I created a Helloworld Android application like Oracle JDeveloper 12 c (12.1.3) tutorials - Setting Up Mobile Application Framework . When I deploy the device app, I can get into the application, but the html page cannot be shown, the newspaper indicates oracle State and functionality of application not valid. Success has not been created. What's the matter with him. Can someone help me? Thank you very much. Here is the part of the newspaper.

  07-16 05:14:09.251: D/dalvikvm (2005): lib shared add /data/app-lib/com.company.MyAndroidMobileApp-1/libvmchannel.so 0xb302f490

  07-16 05:14:09.251: D/dalvikvm (2005): JNI_OnLoad No. found in /data/app-lib/com.company.MyAndroidMobileApp-1/libvmchannel.so 0xb302f490, skipping init

  07-16 05:14:09.251: D/dalvikvm (2005): attempt to load /data/app-lib/com.company.MyAndroidMobileApp-1/libvmchannel_dalvik.so lib 0xb302f490

  07-16 05:14:09.251: D/dalvikvm (2005): lib shared add /data/app-lib/com.company.MyAndroidMobileApp-1/libvmchannel_dalvik.so 0xb302f490

  07-16 05:14:09.251: D/dalvikvm (2005): JNI_OnLoad No. found in /data/app-lib/com.company.MyAndroidMobileApp-1/libvmchannel_dalvik.so 0xb302f490, skipping init

  07-16 05:14:10.091: D/dalvikvm (2005): GC_FOR_ALLOC released 353 K, 6% free 7864/8288 k, break 3ms, 4ms total

  07-16 05:14:10.121: W/ContextImpl (2005): has failed to ensure that the directory: /storage/sdcard/Android/data/com.company.MyAndroidMobileApp/cache

  07-16 05:14:10.271: D/GVC (2005): [SEVERE - oracle.adfmf.framework - EmbeddedFeatureInformation - Builder] invalid application state

  07-16 05:14:10.271: D/GVC (2005): oracle function [SEVERE - oracle.adfmf.framework - EmbeddedApplicationInformation - getAllFeatures]. Success has not been created.

  07-16 05:14:10.361: I/CordovaLog (2005): evolution of the log to DEBUG level (3)

  07-16 05:14:10.361: I/CordovaLog (2005): found preference for useBrowserHistory = true

  07-16 05:14:10.361: D/CordovaLog (2005): found preference for useBrowserHistory = true

  07-16 05:14:10.361: I/CordovaLog (2005): found preference for output-on-suspend = false

  07-16 05:14:10.361: D/CordovaLog (2005): found preference for output-on-suspend = false

  Best regards

  Sheng

  Thank you very much for all. I solved this problem. The reason is that the frame of the mobile application don't either not be applied successfully. How to check if the hotfix is applied successfully, you can view this title:Re: MAF: cannot install Mobile Application Framework JDeveloper Patch, so you need to reapply the patch. If you don't apply the patch once again successfully, I think that you must reinstall JDeveloper in administrator mode.

  Best regards

  Sheng

• I live in the United States and would like to buy a song from the Germany. Is this Possible?

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  You can buy songs that are available on iTunes Store for your country.

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  I have several iTunes Store purchases that appear on my bank statement and I don't know what they are for. Can you help me? I'm unable to maneuver through this system to view previous purchases.  I wonder if I pay for extra storage, it is always advising me that I'm pretty sure.

  Hello

  Open iTunes on your Mac and click your name (if you are not signed in, then sign to see your name). Then click on account information. Once you enter the account information screen, you will see a section called historical of purchases. Click 'View all' to see the list of purchases and the ability to watch the dates more.

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  Is - any technique of special programming used in labview for any specific purpose? I am a novice in labview.

  Thank you

  Josée Vilas V

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  The .ctl files are custom controls.  Without seeing them, I can't be sure, but I suppose they could be witnesses typedef'ed enumerated (enum).  These are often used for engines of the action and state machines.

  The state machine is a widely used program architecture. There are examples in the design templates that ship with LabVIEW.

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• Interrupted SQL statement and start several times with several SQL_EXEC_ID

  Hi all

  We meet a strange phenomenon, maybe someone can help.

  We see that sometimes, when our client runs a single statement, implemented Oracle to process the statement with a special SQL_EXEC_ID, but after a while stops and starts processing the statement along with different SQL_EXEC_ID. Then, after a while, it happens again - stop Oracle processes the statement and start from the beginning with the new SQL_EXEC_ID. This happens again and again until we kill all of the other sessions on the database (then it ends).

  What we see exactly: Client executes the statement (sql_id = "2tp7pz6yv87qp"). Monitor us v $ SQL_MONITOR and get this:

  SELECT Sql_id, sql_exec_id, to_char (SQL_EXEC_START, "HH24:MI:SS MON-DD-YYYY) SQL_EXEC_START, status OF V$ SQL_MONITOR where sql_id = '2tp7pz6yv87qp' ORDER BY SQL_EXEC_START DESC;

  2tp7pz6yv87qp 16777216 28 may 2015 07:19:14 the EXECUTION

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  2tp7pz6yv87qp 16777217 28 may 2015 07:36:17 the EXECUTION

  2tp7pz6yv87qp 16777216 28 may 2015 07:19:14 FACT

  After a while, we see this:

  2tp7pz6yv87qp 16777219 28 may 2015 08:09:58 the EXECUTION

  2tp7pz6yv87qp 16777218 28 may 2015 07:53:37 FACT

  2tp7pz6yv87qp 16777217 28 may 2015 07:36:17 FACT

  2tp7pz6yv87qp 16777216 28 may 2015 07:19:14 FACT

  and so on — will happen again and again until we kill all of the other sessions in the database.

  When comparing the follow-up of the different SQL_EXEC_IDs SQL reports, we see that each of them did exactly the same job: used the same execution plan, beginning treatment she even read/wrote the same amount of e/s and each of them stopped at the same point during execution. You can see that for each SQL_EXEC_ID execution 'stops' in the middle and never reach the end of the plan. She always stops in the JOIN by HASH and never continue to the next steps in the implementation plan.

  When you look more deeply, we see in V$ ACTIVE_SESSION_HISTORY always last thing that happens for every SQL_EXEC_ID is HASH JOIN RIGHT OUTER (SQL_PLAN_OPERATION = HASH and SQL_PLAN_OPTIONS = RIGHT OUTER JOIN). Then comes the new SQL_EXEC_ID and it starts to do the same thing as the previous SQL_EXEC_ID did when it was launched.

  Kill all other sessions, run finally ends. We see that the final (successful) SQL_EXEC_ID work and completes his plan to run to completion.

  When executing the same single statement (when it comes to the single session in the database), it ends with a single SQL_EXEC_ID. Its SQL monitoring report looks like the final execution when the phenomenon occurs after killing all other sessions.

  -We checked that the customer executing the query only once. AWR also only shows simple execution of the query.

  -We have reproduced in many different clients (plus SQL, JDBC thin client OIC and DBMS_SCHEDULER job).

  -It has no PARALLEL in the query or table.

  -In this case for different statements (different INSERT-SELECT and MERGE instructions).

  -Version: Oracle Database 11 g Enterprise Edition Release 11.2.0.3.0 - 64 bit Production

  Does anyone have an idea?

  Finally found the root cause of the problem.

  This phenomenon occurs when the cursor of the active query being invalidated. This can occur in several scenarios, in our case, what happens when we work on a single partition (read or write) and perform DDL operations on different partitions of the same or the tables.

  Steps to reproduce:

  1 launch long command DML that affect the single partition

  2. in the course of executing this SQL, do one of the following values in a session different all 1 minute:

  2.1 do the indexes to a different partition unusable: ALTER TABLE X EDIT PARTITION Y UNUSABLE LOCAL INDEX

  2.2 rebuild the unusable index of different partition: ALTER TABLE X EDIT PARTITION Y REBUILD UNUSABLE LOCAL INDEX

  2.3 a partition different truncate

  Support of Oracle we were told that this problem is known and there are several requests for bugs and improvements thereon, for example this one:

  Bug 12905327 : TRUNCATE to an INVALID PARTITION TABLE UNNECESSARILY IMMEDIATELY all THE SLIDERS

  In our case (ETL process), we used to perform all these operations DDL and DML operations long (we work on different partitions in parallel). In order to solve, we have separated these operations to the different phases in our process and don't be DDL and DML operations at the same time more. This solved the problem for us.

• What happened when RMAN 1 level 1 is running and start a 2nd

  Hello

  I have some doubts on the RMAN backup,

  (1) what will happen when the first backup which is cumulative level 1 is running and second level 1 is launched.

  Example,

  Each work day 4 h level 1 is running and not completed and 9 AM is started before complete 04:00, in this situation, what would happen if 04:00 will be shut down properly and 09:00 will start correctly or any error will be through?

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  When my redundancy policy is 1 so I would have 2 valid level 0 then then a level 0 backup will become obsolete and can delete.

  Help, please.

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• RMAN LEVEL BACKUP INCREMENTAL 0 AND 1 OF CUMULATIVE LEVEL

  Dear friends

  This is Eliza, I need some clarification, your suggestion will help me more...

  Currently I am working in RMAN backup and restore, recovery and I need to take the extra SIZE 0 AND LEVEL 1 CUMULATIVE

  I know something about what level rman incremental 0 and level 1 cumulative can do is, first I have to take the level 0 and then level 1 respectively.

  As follows

  SUNDAY: LEVEL 0 CUMULATIVE

  MONDAY - SATURDAY: LEVEL 1 CUMULATIVE

  SUNDAY: LEVEL 0 CUMULATIVE (repetition of this cycle)
  

  MY QUESTION IS

  Can I use after an order to take INCREMENTIELLE LEVEL 1 CUMULATIVE backup of,

  CUMULATIVE DATABASE INCREMENTAL LEVEL 1; # has changed since the level 0 blocks

  But, if I want to take CUMULATIVE INCREMENTAL level 0 BACKUP, that is me I want to use the following,

  INCREMENTAL LEVEL 0 BACKUP CUMULATIVE BASIS;

  (GOLD)

  DATABASE INCREMENTAL LEVEL 0 BACKUP;

  (GOLD)

  Suggest me your valuable idea. Thanks in advance.

  
  

  Hello

  I think that this CUMULATIVE or incremental level 0 backup specification makes no sense so INCREMENTAL level 0 BACKUP database; = INCREMENTAL CUMULATIVE 0 DATA LEVEL;

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