Number of iterations max of the CPO is configurable?

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• '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.

• NonLinearFitWithWeight do not erturn of error if exceeded the maximum number of iterations

  Hello

  It seems to me that the NonLinearFitWithWeight function does NOT return an error if the maximum number of iterations is reached without achieving a solution – unlike the description in the manual...

  Previously, I had reported a bug related to the NonLinearFitWithMaxIters function that has been fixed in CVI2009 (bug ID 183434). However, since this function nonlinearfitwithweight is new on CVI2009, there could well be a bug too...

  Wolfgang

  
  

• exceed the number of connection max

  Hi all, I have this kind of question. Several users connect to the DB. Once exceeded the number max connection, the program will give this exception.

  Error 500 - Internal server error
  
  javax.faces.el.EvaluationException: oracle.jbo.DMLException: Houston-26061: error when opening JDBC connection.
  at org.apache.myfaces.trinidad.component.MethodExpressionMethodBinding.invoke(MethodExpressionMethodBinding.java:51)
  at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
  at org.apache.myfaces.trinidad.component.UIXCommand.broadcast(UIXCommand.java:190)
  at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:475)
  at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:756)
  at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._invokeApplication(LifecycleImpl.java:957)
  at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:427)
  at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:207)
  at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
  to weblogic.servlet.internal.StubSecurityHelper$ ServletServiceAction.run (StubSecurityHelper.java:227)
  at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
  at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301)
  at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
  at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60)
  at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:205)
  at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60)
  at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:128)
  to org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$ FilterListChain.doFilter (TrinidadFilterImpl.java:446)
  at oracle.adfinternal.view.faces.activedata.AdsFilter.doFilter(AdsFilter.java:60)
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  at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:177)
  at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
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  to oracle.security.jps.ee.http.JpsAbsFilter$ 1.run(JpsAbsFilter.java:119)
  at java.security.AccessController.doPrivileged (Native Method)
  at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:324)
  at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:460)
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  at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1491)
  at weblogic.work.ExecuteThread.execute(ExecuteThread.java:263)
  at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)
  Caused by: oracle.jbo.DMLException: ADFContext Houston-29114 is not configured to process this exception messages. Use the code of exception stack trace and error to investigate the root cause of this exception. Root cause error code is Houston-26061.
  at oracle.jbo.server.DBTransactionImpl.establishNewConnection(DBTransactionImpl.java:1045)
  at oracle.jbo.server.DBTransactionImpl.initTransaction(DBTransactionImpl.java:1185)
  at oracle.jbo.server.DBTransactionImpl.initTxn(DBTransactionImpl.java:6837)
  at oracle.jbo.server.DBTransactionImpl2.connectToDataSource(DBTransactionImpl2.java:304)
  at oracle.jbo.server.DBTransactionImpl2.connectToDataSource(DBTransactionImpl2.java:335)
  at oracle.jbo.common.ampool.DefaultConnectionStrategy.connect(DefaultConnectionStrategy.java:203)
  at oracle.jbo.server.ApplicationPoolMessageHandler.doPoolConnect(ApplicationPoolMessageHandler.java:620)
  at oracle.jbo.server.ApplicationPoolMessageHandler.doPoolMessage(ApplicationPoolMessageHandler.java:425)
  at oracle.jbo.server.ApplicationModuleImpl.doPoolMessage(ApplicationModuleImpl.java:9373)
  at oracle.jbo.common.ampool.ApplicationPoolImpl.sendPoolMessage(ApplicationPoolImpl.java:4530)
  at oracle.jbo.common.ampool.ApplicationPoolImpl.prepareApplicationModule(ApplicationPoolImpl.java:2460)
  at oracle.jbo.common.ampool.ApplicationPoolImpl.doCheckout(ApplicationPoolImpl.java:2270)
  at oracle.jbo.common.ampool.ApplicationPoolImpl.useApplicationModule(ApplicationPoolImpl.java:3169)
  at oracle.jbo.common.ampool.SessionCookieImpl.useApplicationModule(SessionCookieImpl.java:592)
  at oracle.jbo.http.HttpSessionCookieImpl.useApplicationModule(HttpSessionCookieImpl.java:234)
  at oracle.jbo.common.ampool.SessionCookieImpl.useApplicationModule(SessionCookieImpl.java:525)
  at oracle.jbo.common.ampool.SessionCookieImpl.useApplicationModule(SessionCookieImpl.java:520)
  at oracle.jbo.client.Configuration.getApplicationModule(Configuration.java:1609)
  at oracle.jbo.client.Configuration.createRootApplicationModule(Configuration.java:1514)
  at oracle.jbo.client.Configuration.createRootApplicationModule(Configuration.java:1485)
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  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:606)
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  at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297)
  at org.apache.myfaces.trinidad.component.MethodExpressionMethodBinding.invoke(MethodExpressionMethodBinding.java:46)
  ... more than 44
  Caused by: weblogic.jdbc.extensions.PoolLimitSQLException: weblogic.common.resourcepool.ResourceLimitException: no currently available in the pool, DBConnection, to allocate resources to applications, please don't increase the size of the pool and try again...
  at weblogic.jdbc.common.internal.JDBCUtil.wrapAndThrowResourceException(JDBCUtil.java:252)
  at weblogic.jdbc.pool.Driver.connect(Driver.java:142)
  at weblogic.jdbc.jts.Driver.getNonTxConnection(Driver.java:658)
  at weblogic.jdbc.jts.Driver.connect(Driver.java:127)
  at weblogic.jdbc.common.internal.RmiDataSource.getConnectionInternal(RmiDataSource.java:548)
  at weblogic.jdbc.common.internal.RmiDataSource.getConnection(RmiDataSource.java:513)
  at weblogic.jdbc.common.internal.RmiDataSource.getConnection(RmiDataSource.java:506)
  at oracle.jbo.server.DBTransactionImpl.establishNewConnection(DBTransactionImpl.java:1004)
  ... more than 71

  AM my code is like this:

  ...

  int pro_id = 0;

  DBTransaction connection BD = this.getDBTransaction ();

  CallableStatement st =

  dbConnect.createCallableStatement ("start cux_projects_crud.create_proj(?,?,?,?,?,?,?,?,?,?,?); end; ", 0) ;

  try {}

  st.setString (1, proName);

  st.setString (2, null);

  st.setString (3, proSummary);

  st.setString (4, null);

  SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");

  String creationDate = formatter.format (new java.util.Date ());

  endDate = ((Date) this.endDate.getValue ());

  ParsePosition pos = new ParsePosition (8);

  java.sql.Date startDate =

  new java.sql.Date (formatter.parse (creationDate) .getTime ());

  st.setDate (5, startDate).

  st.setDate (5, new SimpleDateFormat("yyyy-MM-dd").parse (new SimpleDateFormat("yyyy-MM-dd").format (new java.util.Date ()), ParsePosition (8))) new;

  st.setDate (6, endDate);

  st.setString (7, company);

  st.setString (8, allSels);

  st.setInt (9, userId);

  st.registerOutParameter (10, Types.INTEGER);

  st.registerOutParameter (11 Types.CHAR);

  st.executeUpdate ();

  pro_id = st.getInt (10);

  } catch (SQLException e) {}

  e.printStackTrace ();

  } catch (ParseException exception) e {}

  e.printStackTrace ();

  } {Finally

  try {}

  St.Close ();

  ....

  } catch (SQLException e) {}

  e.printStackTrace ();

  }

  }

  Return pro_id;

  I will use dbConnect.disconnect () or dbConnect.closeTransaction () to the close bond or any other solution?

  User, tell us your version of jdev, please!

  The final declaration should be sufficient. Howeverm how many connections do you have?

  Od disconnection closing the transaction won't work as the framewoek manages for you. If you do it yourself, the chance is that the framework do not know and to work as if the connection is still alive.

  Timo

  Timo

• Can I get the total number of records that meet the conditions of a query using the Table API?

  Hello

  A < row > TableIterator is returned when I ask operations using the index of tables. If I want to get the total number of records, I count one by one using the returned TableIterator < row >.

  
  

  Can I get the total number of records directly meets the conditions of the query?

  I can get the total number of records directly the request of the meeting of the conditions of CLI using the command Global table - name tableName - count - index index-name-field fieldName - start startValue-end endValue.

  Can I get the same results using the Table API?

  I used MongoDB and NoSQL Oracle for about a year. According to the experience of the use of these dbs, I think mongoDB querying interface is powerful. In the contras, the query interface is relatively simple, which results is a lot of work that is usually a long time in the client side.

  Hello

  Counting records in a database is a tricky thing.  Any system that gives you an accurate count of the records will have a hotspot of concurrency on updates, namely the place where the counting is maintained.  Such a count is a problem of performance in addition to competitive access problem.   The problem is even more difficult in a system widely distributed such a NoSQL database.

  The CLI has overall command that counts, but does so by brutal force - iterate keys that correspond to the parameters of the operation.  This is how you must do this within the API.  There is not a lot of code, but you have to write.  You certainly want to use TableIterator TableAPI.tableKeysIterator (), because a key iteration is significantly faster than the iteration of lines.  Just one iteration and count.

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  Kind regards

  George

• Best practices on the number of decision-making at the bean

  Hi people,

  Here I use Jdev 11.1.1.7.0. where I have a case take the count on lines that are inserted in the bean.

  Here we go...

  The bean code

  developer way 1:
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  developer way 2:
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  Developer tracks 1: view object fetch at the bean intended to take the number of lines.

  -Developer 1 said that best practices on taking into account is to use the view «getRowcount()» object

  Note: the developer 1 2 from that developer comment is further practice. It is a time process is necessary

  2-way Developer: using iterator to get the number of lines

  -Director 2 indicates, for the County, can we use "estimatedRowcount".

  Note: the developer commentary 2 Developer 1 way is worse practice taking the view the bean object.

  Developer it is 1, try to catch the model layer directly from code. We can use the iterator to do all the stuff.

  What is the best practice please suggest me is there any other practice taking the number of lines in the bean.

  Thank you.

  Path dev 1)

  A glance in the java doc reveals

  Note that this method retrieves all rows from the database, and then returns the number of rows in the row set collection.

  So, if your table contains a large number of component getRowCount lines takes a lot of time and memory.

  Way 2 dev)

  Call getEstimatedRowCount runs a count (*) selection (your query) to get the number. It's fast, but the number of task may be different if multiple changes are made on the table. I personally never had a problem with that, but I can't speak for you.

  Timo

• Maximum number of editions - where is the limit?

  Using Oracle 11.2.0.3 SE

  Regarding the edition based redefinition, everyone is aware about a limit to how many editions, you can have in a single database?

  I cound't find any suspicion that in the doc http://docs.oracle.com/cd/E11882_01/appdev.112/e25518/adfns_editions.htm

  Suppose we have 1500 editions and pass the current session to one of them. Each edition has a different version of a some packages.

  I speak only to have several versions of the pl/sql code (triggers, packages, etc.). But no cross editing triggers.

  Everyone is aware of the problems when you use several editions, as the performance of related issues?

  I decided to run tests.

  using code similar to this

  begin
    for i in 1..1000 loop
      execute immediate 'create edition Test'||to_char(i,'FM0000')||' AS CHILD OF Test'||to_char(i-1,'FM0000');
    end loop;
  end;
  /
  

  It worked.

  So I decided to create some editions more. And finally got the expected error message.

  ORA-38812: Hochstzahl der editions erreicht

  In my database (11.2.0.3) the number of editions max is 2000.

  select count(*) from dba_editions;
  
    COUNT(*)
  ----------
        2000
  

  Such a clean value looks like a setting of parameters. But it seems that it is not exposed to us.

  select * from v$parameter where regexp_like(name,'edition');
  no rows returned
  

• That could limit the number of MDB instances in the JMS queue?

  Hi all, I have an app that publish messages in a JMS queue. In SD in the MDB, I defined the following:
  
  < wls:ejb - name > VfDataMiner < / wls:ejb - name >
  < wls:message - driven-descriptor >
  < wls:pool >
  < wls:max - beans-in-free-pool > 25 < / wls:max - beans-in-free-pool >
  < wls: initial-beans-in-free-pool > 10 < / wls: initial-beans-in-free-pool >
  < / wls:pool >
  < / wls:message - driven-descriptor >
  
  My understanding is that this should create up to 25 multilateral development banks to process messages when necessary and that number will fall to 10 if there is no traffic. However, it does not appear so as I saw that 16 consumers at all times.
  
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  Thanks in advance for the advice/pointers.

  http://download.Oracle.com/docs/CD/E12840_01/WLS/docs103/EJB/message_beans.html

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• months Max and the year of the table

  Hello
  
  I need to get the months max and the year of a table.

  DESC WHR_REPORT
  REPORTMONTH   NUMBER(2)
  REPORTYEAR    NUMBER(4)

  Sample data in table
  reportmonth    reportyear
  01              2009
  02              2009
  03              2009
  04              2009
  09              2009
  12              2009
  01              2010
  02              2010

  How can I get the date max which means 022010 table?
  
  Thank you
  Sandy

  select max(to_date(to_char(reportyear) || lpad(to_char(reportmonth), 2, '0'), 'yyyymm' ) )
  from whr_report
  
  or
  
  select reportyear, reportmonth
  from
  (
  select reportyear, reportmonth, row_number() over (order by reportyear desc, reportmonth desc) rn
  from whr_report
  )
  where rn = 1
  

  I forgot to lpad around month

  Published by: bluefrog on June 10, 2010 15:59

• Strange behavior with MIN MAX at the same time.

  Hi all
  
  I had a large table of 5100 K records. I created a Unique Index on a column:
  
  CREATE UNIQUE INDEX TRANS_ID_IDX on TRANS (TRANS_ID);
  
  When I asked the Table with this these two applications:
  
  Select min (trans_id) in trans;
  Select max (trans_id) in trans;
  
  The execution Plan shows INDEX FULL SCAN (MIN/MAX) and the performance is really quickly (0.01 sec) because the optimizer chooses get the value of the index, of course.
  
  But now, if I ask the table with two operators:
  
  Select max (trans_id), min (trans_id) in trans;
  
  I got:
  
  TABLE ACCESS FULL and indeed it's really slow to get my answer (9 seconds).
  
  Even if they are shown a suspicion in my request, it does not:
  
  Select / * + INDEX (TRANS TRANS_ID_IDX) * / max (trans_id), minutes (trans_id) from trans; == > always TABLE FULL ACCESS!
  
  So why the optimizer does not use INDEX FULL SCAN (MIN/MAX) to the query when the min and max are both both in the query?
  
  My database is 11.1.0.7 (with the last batch of patches) on Win XP
  
  Concerning

  SomeoneElse says:
  ... My order_line_detail table has about 42 M lines. order_line_detail_id is the primary key.
  ..

  Primary key does the trick here, or even NOT NULL column definition.

  SQL> drop table dingostar;
  
  Table dropped.
  
  SQL> create table dingostar (id number);
  
  Table created.
  
  SQL> insert into dingostar select rownum as id from dual connect by level <= 5000;
  
  5000 rows created.
  
  SQL> create index dingostar_idx on dingostar(id);
  
  Index created.
  
  SQL> explain plan for
    2  select max(id),min(id) from dingostar;
  
  Explained.
  
  SQL> select * from table(dbms_xplan.display);
  
  PLAN_TABLE_OUTPUT
  ---------------------------------------------------------------------------------------
  Plan hash value: 1182922403
  
  --------------------------------------------------------------------------------
  | Id  | Operation          | Name      | Rows  | Bytes | Cost (%CPU)| Time     |
  --------------------------------------------------------------------------------
  |   0 | SELECT STATEMENT   |           |     1 |    13 |     5   (0)| 00:00:01 |
  |   1 |  SORT AGGREGATE    |           |     1 |    13 |            |          |
  |   2 |   TABLE ACCESS FULL| DINGOSTAR |  5000 | 65000 |     5   (0)| 00:00:01 |
  --------------------------------------------------------------------------------
  
  Note
  -----
     - dynamic sampling used for this statement
  
  13 rows selected.
  
  SQL>
  SQL> drop table dingostar;
  
  Table dropped.
  
  SQL> create table dingostar (id number primary key);
  
  Table created.
  
  SQL> create index dingostar_idx on dingostar(id);
  create index dingostar_idx on dingostar(id)
                                          *
  ERROR at line 1:
  ORA-01408: such column list already indexed
  
  SQL> insert into dingostar select rownum as id from dual connect by level <= 5000;
  
  5000 rows created.
  
  SQL> explain plan for
    2  select max(id),min(id) from dingostar;
  
  Explained.
  
  SQL> select * from table(dbms_xplan.display);
  
  PLAN_TABLE_OUTPUT
  ---------------------------------------------------------------------------------------
  Plan hash value: 528434344
  
  -------------------------------------------------------------------------------------
  | Id  | Operation             | Name        | Rows  | Bytes | Cost (%CPU)| Time     |
  -------------------------------------------------------------------------------------
  |   0 | SELECT STATEMENT      |             |     1 |    13 |     5   (0)| 00:00:01 |
  |   1 |  SORT AGGREGATE       |             |     1 |    13 |            |          |
  |   2 |   INDEX FAST FULL SCAN| SYS_C007051 |  5000 | 65000 |     5   (0)| 00:00:01 |
  -------------------------------------------------------------------------------------
  
  Note
  -----
     - dynamic sampling used for this statement
  
  13 rows selected.
  
  SQL>
  SQL> drop table dingostar;
  
  Table dropped.
  
  SQL> create table dingostar (id number not null);
  
  Table created.
  
  SQL> create index dingostar_idx on dingostar(id);
  
  Index created.
  
  SQL> insert into dingostar select rownum as id from dual connect by level <= 5000;
  
  5000 rows created.
  
  SQL> explain plan for
    2  select max(id),min(id) from dingostar;
  
  Explained.
  
  SQL> select * from table(dbms_xplan.display);
  
  PLAN_TABLE_OUTPUT
  ---------------------------------------------------------------------------------------
  Plan hash value: 2124830711
  
  ---------------------------------------------------------------------------------------
  | Id  | Operation             | Name          | Rows  | Bytes | Cost (%CPU)| Time     |
  ---------------------------------------------------------------------------------------
  |   0 | SELECT STATEMENT      |               |     1 |    13 |     5   (0)| 00:00:01 |
  |   1 |  SORT AGGREGATE       |               |     1 |    13 |            |          |
  |   2 |   INDEX FAST FULL SCAN| DINGOSTAR_IDX |  5000 | 65000 |     5   (0)| 00:00:01 |
  ---------------------------------------------------------------------------------------
  
  Note
  -----
     - dynamic sampling used for this statement
  
  13 rows selected.
  
  SQL>
  

  Nicolas.

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