Edge of metering size buffer/table problem (VC ++)

Similar Questions

• Reg: size (conceptual) table-

  Hi Experts,

  I have a conceptual doubt about the size of a table.

  Tell - we got 500 k. I can store them in a table unique (say "table_x") containing all the lines.

  Is another way they can be stored in 5 tables (say 'table_x1', 'table_x2'... "table_x5") each holding 100 k records.

  So, which of the above data-storage-strategies will consume more space?

  My understanding is that-

  While creating a table, on a bigger picture, he uses segments. Say the segment size = 32K

  Table_x guess that consumes - 25K

  So, in this segment, left out space = (32-25) = 7K

  In the other approach, assume that each table takes 5K and due to some reasons the other (32-5 = 27 K) space remains unused.

  AFAIK, size of tables is calculated by the SUM of the areas of segment. Right?

  Please advise, correct if I am wrong anywhere.

  Thank you and best regards,

  -Nordine

  (on Oracle 11.2.0.3.0)

  Well, the problem is that you think that table is like the pizza box and lines are the pieces of pizza in the box when in fact it is the only pizza that you have in the database and there is no container for it. If you divide 100 GB of space in one go using a single segment or 10 segments of 10 GB each, you always set 100 GB of space only. There is nothing which contain these 10 pieces in itself which could devote additional space compared to the creation of a single segment of 100 GB. The example is not correct. It won't happen will be assigned to you a 100 GB space at once. Oracle allocates extents for this purpose only that you won't be wasting space. Your given scenario would occur when you have a segment or segments N created to allocate the necessary space and now might be to delete the data. It would create the space that would be unused but which would also be taken in charge by the LMT.

  Aman...

• Exact size a table takes

  Hello
  
  Can someone show me how to get the EXACT size a table currently occupies.
  
  
  Thank you.

  Heres something I've implemented for a client recently who wanted the object sizes, it breaks down the by object type (tables, indexes, lobtables, lobindexes) and see the percentage against total db size used in the segments... throw a table_name in if you want to limit the search... to remove the commentary on the inscription 'account' below to exclude all smaller then 50 MB

  as noted above, the blocks are different, but its close enough. could get some use out of it.

  define 999 pages
  fixed lines 180
  SELECT
  owner, table_name, round ((sum (bytes) / 1024/1024/1024), 4) Size_GB,.
  round (TRUNC (sum (bytes) / 1024/1024) / total_size_meg * 100, 2) Percentage_of_total_size.
  total_size_meg
  Of
  (SELECT table_name, nom_segment, owner, bytes)
  FROM dba_segments
  WHERE segment_type = 'TABLE '.
  UNION ALL
  SELECT i.table_name, i.owner, s.bytes
  OF dba_indexes i, s dba_segments
  WHERE s.segment_name = i.index_name
  AND s.owner = i.owner
  AND s.segment_type = 'INDEX '.
  UNION ALL
  SELECT l.table_name, l.owner, s.bytes
  OF dba_lobs l, s dba_segments
  WHERE s.segment_name = l.segment_name
  AND s.owner = l.owner
  AND s.segment_type = 'LOBSEGMENT. '
  UNION ALL
  SELECT l.table_name, l.owner, s.bytes
  OF dba_lobs l, s dba_segments
  WHERE s.segment_name = l.index_name
  AND s.owner = l.owner
  AND s.segment_type is 'LOBINDEX'),
  (select sum(bytes/1024/1024) total_size_meg from v$ datafile)
  WHERE
  -table_name like '%%'
  owner not in ('SYS', 'SYSTEM')
  GROUP BY table_name, owner, total_size_meg
  HAVING SUM (bytes) / 1024/1024 > 50 / * Ignore really small tables currently commented out * /.
  ORDER BY OWNER, SUM (bytes) desc

• Changing aid necessary table problem

  Hello. I hope someone can help me with this problem.
  
  I have two tables, an and mv. Create the following script:
  
  create table (mv)
  the moduleId Char (2) CONSTRAINT ck_moduleId CHECK (moduleId in ("M1", "M2", "M3", "M4', 'M5', 'M6', 'M7', 'M8'")).
  credit ck_credits Number (2) CONSTRAINT CHECK (credits (10, 20, 40));
  constraint pk_mv primary key (moduleId)
  );
  
  create table (its)
  stuId Char (2) CONSTRAINT ck_stuId CHECK (stuId ('S1', 'S2', 'S3', 'S4', 'S5')),
  moduleId tank (2),
  primary key constraint (stuId, moduleId) pk_sa,
  constraint fk_moduleid foreign key (moduleId) references (moduleId) mv
  );
  
  And the scripts below is to insert data into the two:
  
  insert into VALUES mv ("M1", 20)
  /
  insert into VALUES mv ("M2", 20)
  /
  insert into VALUES mv ("M3", 20)
  /
  insert into VALUES mv ("M4", 20)
  /
  Insert in mv VALUES ('M5', 40)
  /
  insert into VALUES mv ("M6", 10)
  /
  insert into VALUES mv ("M7", 10)
  /
  Insert in mv VALUES ('M8', 20)
  /
  
  
  insert into a VALUES ('S1', 'M1')
  /
  insert into a VALUES ('S1', 'M2')
  /
  insert into a VALUES ('S1', 'M3')
  /
  insert into a VALUES ('S2', 'M2')
  /
  insert into a VALUES ('S2', 'M4')
  /
  insert into a VALUES ('S2', 'M5')
  /
  insert into a VALUES ('S3', 'M1')
  /
  insert into a VALUES ('S3', 'M6')
  /
  
  Now for the real problems.
  
  First of all, I need to try to overcome the problem of table mutation ensure that stuid = S1 in table its can not take the two moduleId M5 and M6.
  
  Just one or the other. I created a single trigger, but runs aground because of the changing table problem.
  
  The second problem that I need to overcome is that none of the stuids can have the ModuleID where total value of more than 120 credit credits. Credit value is stored in the table of mv.
  
  Thank you very much in advance for any help.

  Use a statement-level trigger:

  First of all, I need to try to overcome the problem of table mutation ensure that stuid = S1 in table its can not take the two moduleId M5 and M6.

  SQL> create or replace trigger sa_trg
    2  after insert or update on sa
    3  declare
    4  c number;
    5  begin
    6    select count(distinct moduleId) into c
    7    from sa
    8    where stuid = 'S1'
    9    and moduleId in ('M5','M6');
   10    if c > 1 then
   11       raise_application_error(-20001,'S1 on both M5 and M6!!');
   12    end if;
   13  end;
   14  /
  
  Trigger created.
  
  SQL> select * from sa;
  
  ST MO
  -- --
  S1 M1
  S1 M2
  S1 M3
  S2 M2
  S2 M4
  S2 M5
  S3 M1
  S3 M6
  
  8 rows selected.
  
  SQL> insert into sa values ('S1','M5');
  
  1 row created.
  
  SQL> insert into sa values ('S1','M6');
  insert into sa values ('S1','M6')
  *
  ERROR at line 1:
  ORA-20001: S1 on both M5 and M6!!
  ORA-06512: at "SCOTT.SA_TRG", line 9
  ORA-04088: error during execution of trigger 'SCOTT.SA_TRG'
  

  The second problem that I need to overcome is that none of the stuids can have the ModuleID where total value of more than 120 credit credits. Credit value is stored in the table of mv

  SQL> create or replace trigger sa_trg
    2  after insert or update on sa
    3  declare
    4  c number;
    5  begin
    6    select count(distinct moduleId) into c
    7    from sa
    8    where stuid = 'S1'
    9    and moduleId in ('M5','M6');
   10    if c > 1 then
   11       raise_application_error(-20001,'S1 on both M5 and M6!!');
   12    end if;
   13
   14    select count(*) into c from (
   15    select stuid
   16    from mv, sa
   17    where sa.moduleid=mv.moduleid
   18    group by stuid
   19    having sum(credits)>120);
   20
   21    if c > 0 then
   22       raise_application_error(-20002,'A student cannot have more than 120 credits!!');
   23    end if;
   24
   25  end;
   26  /
  
  Trigger created.
  
  SQL>   select stuid, sum(credits)
    2  from mv, sa
    3  where sa.moduleid=mv.moduleid
    4  group by stuid;
  
  ST SUM(CREDITS)
  -- ------------
  S3           30
  S2           80
  S1          100
  
  SQL> insert into sa
    2  values ('S1','M4');
  
  1 row created.
  
  SQL>   select stuid, sum(credits)
    2  from mv, sa
    3  where sa.moduleid=mv.moduleid
    4  group by stuid;
  
  ST SUM(CREDITS)
  -- ------------
  S3           30
  S2           80
  S1          120
  
  SQL> insert into sa
    2  values ('S1','M7');
  insert into sa
  *
  ERROR at line 1:
  ORA-20002: A student cannot have more than 120 credits!!
  ORA-06512: at "SCOTT.SA_TRG", line 20
  ORA-04088: error during execution of trigger 'SCOTT.SA_TRG'
  

  Max
  http://oracleitalia.WordPress.com

• Size of table

  For example, I have 3 table 1 d with different size.  I combined the and turn them into a 2d array.  When I index more short table 1 d of origin out of the aray 2d, the size is now equal to the rest of the original 1 d arrays.  Is there an easy way to preserve the dimension?  I don't want padding.  Thank you.

  Why is it hard? Simply insert a feature bundle height = 1 century before autoindexing on the edge of the loop on the right.

  

• Generate several plots according to the size of table

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  Re: width of column in the specs of the cell

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  I am trying to create a counter edge by directly calling functions in VB.NET nicaiu.dll. I am able to read the counter OK value but counties still return to the initial value set when I created the channel. For example, I create the task of counter by using DAQmxCreateCICountEdgesChan and the value of the initial counter 100000. I then read the meter using DAQmxReadCounterScalarU32. The County changes when I turn the encoder cable channel meter but returns to 100000 once the encoder stops.

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  As far as I know if only this should once (on the first read call), then maybe it something else.

  Out of curiosity, have you considered using the API of VB.NET DAQmx instead of the dll unmanaged c?

  Best regards

• Limit the size of tables in excel

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  If you want to just add 0 to the index that does not exist in X [] then try this.

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• MS Office report Express VI and table problem

  Hi all

  I have a strange problem with MS Office report VI, which is included with the report generation tool. I created an Excel template that I linked, according to the preference "Custom template for Excel" and all the named ranges. However, two of the named ranges that I entered are 1 d arrays of doubles. Now the problem:

  When I entered the berries to their specific name range (it's only 6 values), instead of simply enter the values in the table in the cells he entries like this:

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  2 the value

  ...

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  He does it with two tables so it screws to the top of all formulas. Anyone know how to remove the 0-6 and simply enter the values?

  Thank you all

  The Express VI are easy and convenient, but some costs. Since the Express VI can also accept a waveform entry, you have to accept that it will add a channel name.

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  The "it takes less time to try just to post a message asking if it is": the answer is Yes. But only if the default value is an empty array to start. Obviously.

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  Wire a constant empty array to your choice of a local variable or a node of 'Value' property, in view of the elimination of any potential race condition.