Best way to test the performance of FreeNas

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  What is the best way to improve the performance of this all-in-one PC?

  Thanks in advance.

  David Barrett.

  Here are a few methods:

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  Your app throws an exception?

  You can also use the EventLogger to log messages

  EventLogger.register ( myappguid , "myapp", EventLogger.VIEWER_STRING);
  EventLogger.logEvent ( myappguid , mymsg, EventLogger.ALWAYS_LOG);

  and ALT-LGLG to view then on your phone.  Place a large number of newspapers msgs help for debugging on a real device.

• Best way to update the individual rows of a Table?

  I took a quick glance at a few examples, but did not get a clarification on this.  I am looking to have something close to a listbox control or the table to where I can update just one column of values to line a 1 time per second pace.  I'm looking to display our acquisition of data values in a table or a listbox control.  The single list box seemed to work well for that, but I couldn't use the row headers to list the names of channel beside the channel values.  I thought to link the values of cursor in two areas of list to do this, but did not find any info on it for the single list box.

  I have a few questions:

  (1) I have a 1 d table to where I want to use this data to constantly update the first column (with a multitude of lines) of a table.  I'm looking for the best route to not take too much time for treatment by doing this.

  What is the best way to update the individual rows of a table?   Invoke the node "Value of the cell value"... or is there another method?

  (2) why is that, after each iteration else, row values are deleted?

  Also, for adding additional channels originally arrray... it is better to use the 'Array' subset then the function "Construct the table" or function "Subset of the table" and "insert table"?

  See the attached example.

  Thank you.

  Jeff· Þ· Bohrer says:

  (2) why is that, after each iteration else, row values are deleted?

  Classic race condition.  dump the loop and node-p and just wire the 2D table on the terminal Board. !

  I don't see the race condition.  What I see is the table once the last element has been written for it all run the oil.  I saw looked it with point culminating performance on.

  But I agree entirely with writing to the Terminal.  It is a 1 d array, so you will need to use an array of generation and convert a 2D array in order so that he could write correctly.

• Best way to discover the top N

  Hi all

  Sorry to ask a question on Friday. I've had this issue for some time now, what is the best way to discover the first N?

  For example, how do you know top 10 Web hosts that have the highest use of CPU for a certain period of time.

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  If (vb is nothing)

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  VA - vb > 0? 0: 1

  } .subList (0, 10)

  Then, of course, these are not very effective. Is there a better way to get this top N list I'm looking for?

  Thank you

  Xiaoning

  Here is an example of the batch api to query the memory of the virtual machine, and then I take action on a specific period of time.

  import com.quest.nitro.service.sl.interfaces.data.IDataService;

  import com.quest.nitro.service.sl.interfaces.data.ObservationQuery;

  import com.quest.nitro.model.topology.TopologyObject;

  import com.quest.nitro.service.sl.ServiceLocatorFactory;

  Import org.apache.log4j.Logger;

  def LOG = Logger.getLogger ("batch.query.test");

  topologyObjects = new HashSet (#!) VMWVirtualMachineMemory # .topologyObjects);

  Log.info ("topology objects querying ${topologyObjects.size ()}...");

  endTime = System.currentTimeMillis ();

  startTime = endTime - (4 * 60 * 60 * 1000 L);

  IDataService dataSvc is ServiceLocatorFactory.getLocator () .getDataService ();.

  Query ObservationQuery = dataSvc.createObservationQuery ();

  query.setStartTime (startTime);

  query.setEndTime (endTime);

  Query.include (topologyObjects, "active");

  Query.include (topologyObjects, "affected");

  Query.include (topologyObjects, "zero");

  result = dataSvc.performQuery (query);

  long term = System.currentTimeMillis () - endTime;

  Log.info ("request completed in ${duration} ms.");

• What is the best way to support the retina screens?

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• What is the best way to check the data

  What is the best way to check the actual changes in the data, i.e., to be able to see each insert, update, delete on a given line, when it happened, who did it, and what looked like to the front row and after the change?
  
  Currently, we have implemented our own audit infrastructure where we generate standard triggers and an audit table to store the OLD (values at the beginning of the Timekeeping point row before) and NEW (values at the beginning of the point of timing after line) values for each change.
  
  I put this strategy due to the performance impact there (important say least) and because it's something that a developer (confession, I'm the developer) came with, rather than something is a database administrator came with. I looked in the audit of the Oracle, but it doesn't seem like we would be able to go back and see what a line looked like at some point in time. I also watched flashbacks, but this seems like it would take a monumental amount of storage just to be able to go back a week, much less the years currently keep us these data.
  
  Thank you
  Matt Knowles
  
  Published by: mattknowles on January 10, 2011 08:40

  mattknowles wrote:
  What is the best way to check the actual changes in the data, i.e., to be able to see each insert, update, delete on a given line, when it happened, who did it, and what looked like to the front row and after the change?

  Currently, we have implemented our own audit infrastructure where we generate standard triggers and an audit table to store the OLD (values at the beginning of the Timekeeping point row before) and NEW (values at the beginning of the point of timing after line) values for each change.

  You can either:
  1. set up your own audit custom (as you do now)
  2 flashback Data Archive (11 g). Application for licence.
  3 version check your tables with Workspace Manager.

  >

  I put this strategy due to the performance impact there (important say least) and because it's something that a developer (confession, I'm the developer) came with, rather than something is a database administrator came with. I looked in the audit of the Oracle, but it doesn't seem like we would be able to go back and see what a line looked like at some point in time. I also watched flashbacks, but this seems like it would take a monumental amount of storage just to be able to go back a week, much less the years currently keep us these data.

  Unfortunately, the audit of data always takes a lot of space. You should also consider the performance, as custom triggers and Workspace Manager will perform much slower than the FDA if there is heavy DML on the table.

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  Please help,
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  Hello

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  Add a lot of statements of output so you can see what made the procedure. Don't forget to delete them after that trial is over.

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                      || ' = v_truncate_sql inside missing_authorized_services'
                      );
  END      missing_authorized_services;
  

  If you get any errors (for example, ORA-00955, because you try to give the same name to a procedure that you already use for a table), then fix the error and try again.
  When he worls perfectly, then add another baby step. For example, you can add the line

  EXECUTE IMMEDIATE v_truncate_sql;
  

  and test again.

  Do not use SQL dynamic (EXECUTE IMMEDIATE) unless you have to.
  Is there a reason to use dynamic SQL for INSERT statements?

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• What is the best way to store the RCS for an insert/update in this rec

  Oracle on Win 64 non-conteneur 12.1.0.2

  When a record in one table is inserted or updated, what would be the best way to store the RCS for this record in this folder.

  I thought of a line after trigger, but did not know if this trigger to store the current_scn would still fire that trigger again (recursive trigger).

  Someone at - he a good idea of what the best way is to do?  The devs don't want to store the pk and the SNA in yet another table...

  Yes, row_dependencies would be the best way to go.  But mgmt doesn't recreate all tables for this.

  3rd party applications retrieve data from tables (all data).  We are looking for a way for them to just pull what is new or updated updated since their last sweater.

  I suggest that you try again and give all OF THE REQUIREMENTS.

  You have rejected ANY answer given and he justified using 'hidden' on what knowledge management or the devs want or do not want to. Stop making us guess what are the requirements and constraints. If you want a real answer then tell us ALL the news.

  When a record in one table is inserted or updated, what would be the best way to store the RCS for this record in this folder.

  Solomon answered repeatedly. If you want to add a column to a table to store the then "best" SNA is to let the Oracle to do this for you automatically by using the DEPENDENCY LINE.

  As he says also re-create the table to add this clause will be MUCH MORE EFFECTIVE that everything THAT you can do it manually. It will be also more accurate because Oracle will fill the value ORA_ROWSCN with the SNA at the time the line was committed. You, as long as user, can't fill a column in function when a line is engaged since real VALIDATION belongs to a transaction, not the line or the trigger that you use.

  Yes - there are two drawbacks to this method:

  1. you need to re-create the table

  2. you cannot add an index to this "hidden" column

  The devs don't want to store the pk and the SNA in yet another table...

  Then? Who cares what the devs want to do? You want the BEST solution? Next, you will need to put aside personal preferences and determine what is the 'best' solution. Why it is important that certain dev wants to do this or not?

  OK, the problem of biz is now, 3rd party external users are an all-wheel drive large number of tables in the database via the API that we wrote.  That was obviously interrupted OLTP during the day.  To reduce to the minimum, we want for them just to extract data that has been inserted/updated since their last sweater.

  It is the definition of a "replica" DB Then why don't you consider a real replicated DB? You can use DataGuard and have replicated DB which is read only that can be used to generate reports. Oracle does ALL the work to keep ALL the tables in sync. You and your developers do NOTHING!

  We thought that store the RCS higher their last sweater would allow the API to extract only data with YVERT higher than their last data pull CHN.

  OK - except you keep rejecting solutions actually do. Ask you questions about the SNA stored in the same table, but then reject the solution that does this. And then you add your "devs" don't want to store the info in a new table either.

  Then your solutions must ONLY use the replication or Log Miner. The REDO logs have all changes, if you want to extract yourself. Replication (e.g., DataGuard) will use these logs for you to maintain a replicated database.

  We thought about it, but recreate all tables in production with ROWDEPENDENCIES as well as dealing with CF and other dependencies idea this was shot.

  Well you NEVER mentioned you "thought that" and rejected it. And you NEVER mentioned anything about FKs and other dependencies. What is FKs and other dependencies which prevents this working solution? Tell us! Give us ALL the information.

  Wouldn't a trigger AFTER LINE capture the commit YVERT?  Or is after really not after validation?

  No - a trigger has NOT one commit. A trigger runs as a step in a transaction. Validation applies to the entire transaction. Until you, or Oracle, issues a commit, there is NO "committed SNA" to be stored as ORA_ROWSCN.

  You can easily see that for yourself. Create a simple table with dependencies of the line and then update two different sessions.

  create the table emp_scn rowdependencies in select * from emp where rownum<>

  Select empno, emp_scn ora_rowscn

  Update emp_scn set work = 'b' where empno = 7499

  commit;

  The first SELECT statement will show you that each row has the same SNA.

  EMPNO, ORA_ROWSCN

  7369,70622201

  7499,70622201

  7521,70622201

  Now, do the update (but no commit), then SELECT it

  EMPNO, ORA_ROWSCN

  7369,70622201

  7499,

  7521,70622201

  Where is the value of 7499? This session will NOT see a value for the changed lines in the current transaction. Other sessions will still see the old value.

  Now do the validation, then SELECT

  EMPNO, ORA_ROWSCN

  7369,70622201

  7499,70622301

  7521,70622201

  7499 now has a new and different value than the other lines. It will not be this new value until the validation occurs.

  Yes, row_dependencies would be the best way to go.  But mgmt doesn't recreate all tables for this.

  Well, you got the answer you want. You ask the best way. Now, you say that you were told the best way. But now you don't like the answer.

  How is it our fault? Your question has been answered wasn't she?

  Here are the facts:

  1 oracle creates a history of changes - the REDO log files

  2. you can use Log Miner to extract these changes

  3. you can create your own change log by adding a log file of MV to your table.

  4. you can then write a custom code to use this MV log file to determine which rows to "reproduce".

  So far reject you all THE POSSIBLE solutions.

  Accept it or change the requirements to allow one of the solutions proposed to be used.

  Personally, if I HAD to use a customized solution, I would use a MV journal to record the ROWID of the lines that have changed (for tables ROWID cannot be changed). I would then extract the appropriate lines by pulling on the lines corresponding to these row ID.

  Even that has problems since a line can be changed several times and children lines can also be amended several times - these questions FK you mentioned.

  I suggest you read this entire thread on AskTom a dozen years ago. It addresses ALL these issues.

  https://asktom.Oracle.com/pls/Apex/f?p=100:11:0:P11_QUESTION_ID:16998677475837

  Then in your next reply on this topic give us a summary of where some things with your question and what help you further expect.