Calculate used space in database!

Hi all,
I can calculate used space by using the following ways:
1. Calculate allocated size by issuing
SELECT SUM(d.bytes/1024/1024/1024)
FROM dba_data_files;
2. Calculate free space by issuing
SELECT SUM(bytes/1024/1024/1024)
from dba_free_space;
Used space will be the value from first statement - value of the second statement! This is manual way!
Is this possible to combine the two above queries?
Thank you!
Dan.

You can certainly combine the queries
SELECT (allocated.bytes - free.bytes )/1024/1024/1024 used_gb
FROM (select sum(bytes) bytes from dba_data_files) allocated,
(select sum(bytes) bytes from dba_free_space) freeNormally, you'd group by tablespace as well.
But if you just want the amount of space used, it's probably easier to just
SELECT sum(bytes)/1024/1024/1024 used_gb
FROM dba_segmentsJustin

Similar Messages

Tsql for database , size , free space or used space in database

hi,
i want to know how to find out database size

use master
declare @PageSize varchar(10)
select @PageSize=v.low/1024.0
from master..spt_values v
where v.number=1 and v.type='E'
select name as DatabaseName, convert(float,null) as Size
into #tem
From sysdatabases where dbid>4
declare @SQL varchar (8000)
set @SQL=''
while exists (select * from #tem where size is null)
begin
select @SQL='update #tem set size=(select round(sum(size)*'+@PageSize+'/1024,0) From '+quotename(databasename)+'.dbo.sysfiles) where databasename='''+databasename+''''
from #tem
where size is null
exec (@SQL)
end
select * from #tem order by DatabaseName
drop table #tem
The first select statement is to get how many kilobytes a data page has. SQL Server allocates disk space in the unit of data page. Currently each SQL server data page contains 8k bytes. The number of data pages allocated to each database file is recorded
in the sysfiles system table. With this information on hand the script creates a temporary table #tem and update the temporary table with size information which is gathered by querying the sysfiles table.
thx benedikt

How to know used space(size) of database or user?

Hi
can anyone let me know how to caluculate the used space(size) of the database ans user(schema).
Thanks in advance.

Hello,
For the used space of the database you may use the following query:
select sum(bytes)/(1024*1024) "Mo" from dba_segments;For the used space of the Schemas you may use the query below:
select owner, sum(bytes)/(1024*1024) "Mo"
from dba_segments
group by owner;Hope this help.
Best regards,
Jean-Valentin

How to use a Logical Database in Function Module.

Hi Experts,
I want to use a logical database in a Function Module to fetch data from a standard SAP table into a Internal table for certain filter conditions.
How can I get get this done????
I called LDB_PROCESS FM in my FM, but I could not figure out how to store the extract in my IT table since we cant use GET in FM.
Please provide me a sample code if possible.
Thanks in Advance,
Alex.

Hi,
i had an example program like this ,in this i want to get the data using pnp logical database with 5 fields in an interface program.
data: begin of it_final occurs 0,
        pernr like pa0002-pernr,
        vorna like pa0002-vorna,
        nachn like pa0002-nachn,
       usrid like pa0105-usrid,
       usrid_long like pa0105-usrid_long,
       end of it_final.
get pernr.
clear : p0000,p0002,p0105.
rp-provide-from-last p0000 space p_date p_date.
if p0000-stat2 = '3'.
    v_pernr = pnppernr-low.
else.
    reject.
endif.
*---Get employee pernr, First name ,Last name into final table
rp-provide-from-last p0002 space p_date p_date.
if pnp-sw-found = '1'.
   it_final-pernr = p0002-pernr.
   it_final-vorna = p0002-vorna.
   it_final-nachn = p0002-nachn.
else.
*---Error message if not infotype 0002 maintained
T_ERROR-PERNR   = pnppernr-low.
CONCATENATE TEXT-EMI '0002'
INTO T_ERROR-MESSAGE SEPARATED BY SPACE.
APPEND T_ERROR.
CLEAR T_ERROR.
endif.
**--Get SYSTEM USERNAME to final table
rp-provide-from-last p0105 0001 p_date p_date.
if pnp-sw-found = '1'.
    it_final-usrid = p0105-usrid.
else.
*---Error message if not SYSTEM USERNAME maintained
    T_ERROR-PERNR   = pnppernr-low.
    CONCATENATE TEXT-003 '0105'
    INTO T_ERROR-MESSAGE SEPARATED BY SPACE.
    APPEND T_ERROR.
    CLEAR T_ERROR.
endif.
**--Get Email ID to final table
rp-provide-from-last p0105 0010 p_date p_date.
if pnp-sw-found = '1'.
    it_final-usrid_long = p0105-usrid_long.
else.
*---Error message if not Email ID maintained
    T_ERROR-PERNR   = pnppernr-low.
    CONCATENATE TEXT-004 '0105'
    INTO T_ERROR-MESSAGE SEPARATED BY SPACE.
    APPEND T_ERROR.
    CLEAR T_ERROR.
endif.
   append it_final.
    clear it_final.
reward points if useful,
venkat.

Using sql to monitor free/used space

Hi,
Using the next sql statement
SELECT /* + RULE */ df.tablespace_name "Tablespace",
       df.bytes / (1024 * 1024) "Size (MB)",
       SUM(fs.bytes) / (1024 * 1024) "Free (MB)",
       Nvl(Round(SUM(fs.bytes) * 100 / df.bytes),1) "% Free",
       Round((df.bytes - SUM(fs.bytes)) * 100 / df.bytes) "% Used"
FROM dba_free_space fs,
       (SELECT tablespace_name,SUM(bytes) bytes
          FROM dba_data_files
         GROUP BY tablespace_name) df
WHERE fs.tablespace_name (+) = df.tablespace_name
GROUP BY df.tablespace_name,df.bytes
UNION ALL
SELECT /* + RULE */ df.tablespace_name tspace,
       fs.bytes / (1024 * 1024),
       SUM(df.bytes_free) / (1024 * 1024),
       Nvl(Round((SUM(fs.bytes) - df.bytes_used) * 100 / fs.bytes), 1),
       Round((SUM(fs.bytes) - df.bytes_free) * 100 / fs.bytes)
FROM dba_temp_files fs,
       (SELECT tablespace_name,bytes_free,bytes_used
          FROM v$temp_space_header
         GROUP BY tablespace_name,bytes_free,bytes_used) df
WHERE fs.tablespace_name (+) = df.tablespace_name
GROUP BY df.tablespace_name,fs.bytes,df.bytes_free,df.bytes_used
ORDER BY 4 DESC;from the source
http://www.orafaq.com/wiki/Tablespacethe output is
Tablespace                     Size (MB)              Free (MB)              % Free                 % Used
TS_UNDO                        4000                   3973,875               99                     1
SYSAUX                         512                    293,5625               57                     43
SYSTEM                         512                    224,3125               44                     56
DATA                           70000                  24346,375              35                     65
TS_TEMP                        5000                   460                    9                      91
INDX                           30000                  2349,0625              8                      92why doesn't have the ts_temp tablespace almost free space?
becouse if I use the management database sql developer option the ts_temp output is
Tablespace                     Size (MB)              Free (MB)              % Free                 % Used
TS_TEMP                        null                    0                      null                  nullthanks in advanced

The first half of your query seems to work -- just keep in mind that is doesn't consider that the tablespace datafiles might be auto-extendable up to some limit.
The second half doesn't seem to work (I'm in 11g).
Here's what I use to look at temp-space totals:
select f.tblspc as "Tablespace"
     , nvl( sum( s.blocks * b.value ), 0 ) as "Bytes-Used"
     , f.bytes as "Bytes-Available"
     , round( nvl( sum( s.blocks * b.value ), 0 ) / f.bytes * 100, 2 ) as "%-Used"
from ( select tablespace_name       as tblspc
               , sum(bytes)            as bytes
               , 'Temporary'           as tstype
            from dba_temp_files
           group by tablespace_name, 'Temp-TblSpc'
          union
          select tablespace_name       as tblspc
               , sum(bytes)            as bytes
               , 'Regular'             as tstype
            from dba_data_files
           where tablespace_name in ( select distinct temporary_tablespace from dba_users )
           group by tablespace_name, 'Reg-TblSpc'
        ) f
        left join
        v$sort_usage s on ( f.tblspc = s.tablespace )
        join
        ( select value
            from v$parameter
           where name = 'db_block_size'
        ) b on (1=1)
group by f.tblspc
         , f.tstype
         , f.bytes
order by 1 ;And here's what I use to look at which users are using temp-space:
select t.tablespace
     , t.username
     , f.tstype as type
     , round((sum(decode(segtype, 'SORT',     t.blocks,0))*b.bsz)/1024/1024,2) as sort_mb
     , round((sum(decode(segtype, 'DATA',     t.blocks,0))*b.bsz)/1024/1024,2) as data_mb
     , round((sum(decode(segtype, 'HASH',     t.blocks,0))*b.bsz)/1024/1024,2) as hash_mb
     , round((sum(decode(segtype, 'INDEX',    t.blocks,0))*b.bsz)/1024/1024,2) as indx_mb
     , round((sum(decode(segtype, 'LOB_DATA', t.blocks,0))*b.bsz)/1024/1024,2) as lobs_mb
     , round((sum(decode(segtype, 'SORT', 0, 'DATA', 0, 'HASH', 0, 'INDEX', 0, 'LOB_DATA', 0
                                             , t.blocks ))*b.bsz)/1024/1024,2) as othr_mb
     , round((sum(t.blocks)*b.bsz)/1024/1024,2)                                 as all_mb
     , round((max(u.blks)*b.bsz)/max(f.bytes)*100,2)   as "All-TS-%"
     , round((max(u.blks)*b.bsz)/1024/1024) ||'/'||
        round(max(f.bytes)/1024/1024,2) as "All-TS-Usage-mb"
from v$tempseg_usage t
        cross join
        ( select value as bsz from v$parameter where name = 'db_block_size' ) b
        left join
        ( select tablespace_name       as tablespace
               , sum(bytes)            as bytes
               , 'Temporary'           as tstype
            from dba_temp_files
           group by tablespace_name
        union
          select tablespace_name
               , sum(bytes)
               , 'Regular'
            from dba_data_files
           where tablespace_name in
                    ( select distinct temporary_tablespace from dba_users )
           group by tablespace_name
        ) f on ( t.tablespace = f.tablespace )
        left join
        ( select tablespace, sum(blocks) as blks
            from v$tempseg_usage
           group by tablespace
        ) u on ( t.tablespace = u.tablespace )
group by t.username, t.tablespace, f.tstype, b.bsz
order by t.tablespace, t.username ;Maybe that helps.

Is Oracle Expert tool still used in Oracle database 11g?

Is Oracle Expert tool still used in Oracle database 11g?

!exp help=yes
Export: Release 11.2.0.1.0 - Production on Sat May 8 08:17:06 2010
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
You can let Export prompt you for parameters by entering the EXP
command followed by your username/password:
     Example: EXP SCOTT/TIGER
Or, you can control how Export runs by entering the EXP command followed
by various arguments. To specify parameters, you use keywords:
     Format: EXP KEYWORD=value or KEYWORD=(value1,value2,...,valueN)
     Example: EXP SCOTT/TIGER GRANTS=Y TABLES=(EMP,DEPT,MGR)
               or TABLES=(T1:P1,T1:P2), if T1 is partitioned table
USERID must be the first parameter on the command line.
Keyword    Description (Default)      Keyword      Description (Default)
USERID     username/password          FULL         export entire file (N)
BUFFER     size of data buffer        OWNER        list of owner usernames
FILE       output files (EXPDAT.DMP) TABLES       list of table names
COMPRESS   import into one extent (Y) RECORDLENGTH length of IO record
GRANTS     export grants (Y)          INCTYPE      incremental export type
INDEXES    export indexes (Y)         RECORD       track incr. export (Y)
DIRECT     direct path (N)            TRIGGERS     export triggers (Y)
LOG        log file of screen output STATISTICS   analyze objects (ESTIMATE)
ROWS       export data rows (Y)       PARFILE      parameter filename
CONSISTENT cross-table consistency(N) CONSTRAINTS export constraints (Y)
OBJECT_CONSISTENT    transaction set to read only during object export (N)
FEEDBACK             display progress every x rows (0)
FILESIZE             maximum size of each dump file
FLASHBACK_SCN        SCN used to set session snapshot back to
FLASHBACK_TIME       time used to get the SCN closest to the specified time
QUERY                select clause used to export a subset of a table
RESUMABLE            suspend when a space related error is encountered(N)
RESUMABLE_NAME       text string used to identify resumable statement
RESUMABLE_TIMEOUT    wait time for RESUMABLE
TTS_FULL_CHECK       perform full or partial dependency check for TTS
VOLSIZE              number of bytes to write to each tape volume
TABLESPACES          list of tablespaces to export
TRANSPORT_TABLESPACE export transportable tablespace metadata (N)
TEMPLATE             template name which invokes iAS mode export
Export terminated successfully without warnings.

Finding the size of db and size of used space

Greetings all good people.
Can you please help me find out about 2 database information?
One, I want to find out the size of a database =size of physical files.
and the size of data which is the size occupied in physical files.
We are about to start a new project and there is a table on the database but it is empty.
We want to be exporting data into this table but we want to make sure that there is enough space on the db before we start populating the table with data.
I believe the code below just gives me the size of the database.
select (bytes/1024/1024) as total_gigs from dba_segments where owner='BELL' and segment_name='$TABLE_NAME
But I want to know the total size of the database and how much size has been used already, much the same as you would want to know the size capacity of a hard drive and how much of the size has been used.
Sorry if my request is confusing.
Thanks a lot in advance

db size can be found out
select sum(bytes)/1024/1024/1024 from dba_data_files ;
and size of data is -- in the datafiles
select sum(bytes)/1024/1024/1024 from dba_segemnts ;
You can find out by below query .. the tablespace sizes -- would be DBSIZE
used space -- would be the actual occupied space.
select t.tablespace, t.totalspace as " Totalspace(MB)",
round((t.totalspace-nvl(fs.freespace,0)),2) as "Used Space(MB)",
nvl(fs.freespace,0) as "Freespace(MB)"
from
(select round(sum(d.bytes)/(1024*1024)) as totalspace,d.tablespace_name tablespace
from dba_data_files d
group by d.tablespace_name) t, (select round(sum(f.bytes)/(1024*1024)) as freespace,f.tablespace_name tablespace
from dba_free_space f
group by f.tablespace_name) fs
where t.tablespace=fs.tablespace (+)
order by t.tablespace

How can I effectively use "Spaces?"

I am going to try this again and see if anyone has any suggestions: Is there any way of disassociating an application's ownership of a "Space" in Spaces?
I want to be able to have, say, different open documents belonging to, say, Word, or Excel, in different Spaces for different projects. The trouble is if I open an application is a space, that space appears to now "own" that application. If I open a document using that application in, say, Space 1, and I then move that window to Space 2 for example, I have a problem!
So I am using Space 2 for Project A and all documents for Project A are in Space 2. Also, in Space 3 I have all the windows for Project B. It is often the case that Word, which I opened in Space 1, now has document windows in Space 1, 2 and 3.
Let us say that in Space 2 I also have a database application open and I do something in its window, when I click on the Word document window - swoosh - I am back in Space 1, where I opened Word in the first place. To get back to my project I must move back to Space 2 where I find the document window is focused and I can work in it. However if I go back to the other window in Space 2, the database window, and then again click on the Word document window - swoosh again - back in Space 1.
Extremely irritating, and makes Spaces unusable.
Any help? I do NOT want any Space to "own" any application. An application is common to ALL spaces, no ownership. In fact, and application is just a system resource like a printer or the clock.
Thanks - Lawrence

Yes, if I do not change apps in the interim I can move from document 1 in Space 1 to document 2 in Space 2 and they are both editable instantly. But now if I go to the document 2 in Space 2 and, while in Space 2 I use a window from some other application, like for example I look at some entry in an Excel spreadsheet, then click back on my document 2 - swoosh, I am moved back to Space 1.
In other words, as an app "owns" a space, if I am to switch back and forth between documents (windows) in the same app, they must all be in the same Space else I am moved back to the Space where I first opened the app.
To me, this is entirely illogical! Why must a Space "own" an application? I should be able to access and use any window from any app in any Space, and stay in that Space until "I" decide to move.
For example I have my usual apps (Mail, Address Book, Calendar, Adium, etc.) in Space 1. Space 2 contains some log files. Space 3 is a project I am working on. All 3 Spaces have Word documents in them. This does not work, yet it seems an entirely reasonable way to work.
I do not understand it.
Thanks for your help.
Lawrence

To know free space in database files

Hi all,
how to know free space and used space in individual database files by sql quer or command not from oracle enterprise manager.please can any body tell me query.quick response will higly appreciated.thanks a lot in advance.

Hi;
column file_name format a42
column tablespace_name format a15
column status format a3 trunc
column t format 999,999.000 heading "Total MB"
column a format a4 heading "Aext"
column p format 990.00 heading "% Free"
SELECT df.file_name,
df.tablespace_name,
df. status,
(df.bytes/1024000) t,
(fs.s/df.bytes*100) p,
decode (ae.y,1,'YES','NO') a
FROM dba_data_files df,
(SELECT file_id,SUM(bytes) s
FROM dba_free_space
GROUP BY file_id) fs,
(SELECT file#, 1 y
FROM sys.filext$
GROUP BY file#) ae
WHERE df.file_id = fs.file_id
AND ae.file#(+) = df.file_id
ORDER BY df.tablespace_name, df.file_id;
column file_name clear
column tablespace_name clear
column status clear
column t clear
column a clear
column p clear
ttitle off
Sample Output:
FILE_NAME TABLESPACE_NAME STA Total MB % Free Aext
/usr/ORACLE/u02/data/example01.dbf EXAMPLE AVA 153.600 49.13 YES
Edited by: emre baransel on Sep 30, 2009 10:11 AM

Monitoring Used (%) space for tablespaces

Hi everyone,
I am currently using:
Redhat Linux ES 5 2.6.18 and also
Oracle 10g Release 2 for Linux x86 R10.2.0.3
While monitoring my Tablespaces using OEM Database Control, I notice that two tablespaces were almost full.
[SYSAUX] - Size: 290MB , Used 283MB (97% full)
[SYSTEM] - Size: 320MB, Used 313MB (98% full)
When I try to locate the datafiles of both tablespaces in its directory (/home/dba/oracle/oradata/oracle), it shows the allocated size (290MB for sysaux01.dbf & 320MB for system01.dbf) and not the used space.
I got three questions to ask over here:
1st- Why there isn't any warnings or alarms even though the tablespaces exceeds the critical size?
2nd- How come the datafiles shows the allocated size of the tablespaces and not the Used space?]
3rd- How can I find & monitor the actual used space of the tablespaces?
4th- I have enabled the AutoExtend function but I am worry whether is there any other concern?
I am still very new here.
Please pardon me for anything that is improper.
Looking forward for your expertise, guidance & help.
Thanks for your attention.
-Regards-
++ Kef Lim ++

Hi,
Here you have some scripts:
TABLESPACE USAGE NOTES:
Tablespace Name - Name of the tablespace
Bytes Used - Size of the file in bytes
Bytes Free - Size of free space in bytes
Largest - Largest free space in bytes
Percent Used - Percentage of tablespace that is being used - Careful if it is more than 85%
select     a.TABLESPACE_NAME,
     a.BYTES bytes_used,
     b.BYTES bytes_free,
     b.largest,
     round(((a.BYTES-b.BYTES)/a.BYTES)*100,2) percent_used
from
          select      TABLESPACE_NAME,
               sum(BYTES) BYTES
          from      dba_data_files
          group      by TABLESPACE_NAME
     a,
          select      TABLESPACE_NAME,
               sum(BYTES) BYTES ,
               max(BYTES) largest
          from      dba_free_space
          group      by TABLESPACE_NAME
     b
where      a.TABLESPACE_NAME=b.TABLESPACE_NAME
order      by ((a.BYTES-b.BYTES)/a.BYTES) desc
SET SERVEROUTPUT ON
SET PAGESIZE 1000
SET LINESIZE 255
SET FEEDBACK OFF
PROMPT
PROMPT Tablespaces nearing 0% free
PROMPT ***************************
SELECT a.tablespace_name,
       b.size_kb,
       a.free_kb,
       Trunc((a.free_kb/b.size_kb) * 100) "FREE_%"
FROM   (SELECT tablespace_name,
               Trunc(Sum(bytes)/1024) free_kb
        FROM   dba_free_space
        GROUP BY tablespace_name) a,
       (SELECT tablespace_name,
               Trunc(Sum(bytes)/1024) size_kb
        FROM   dba_data_files
        GROUP BY tablespace_name) b
WHERE a.tablespace_name = b.tablespace_name
AND    Round((a.free_kb/b.size_kb) * 100,2) < 10
PROMPT
SET FEEDBACK ON
SET PAGESIZE 18
Set Termout On
Set Heading On
clear breaks
break on contents -
skip 1
compute Sum of alloc used free nbfrag on contents
column tblsp         format a20 wrap          heading "Tablespace Name"
column Alloc         format 999,999           heading "Alloc|(Mb)"
column Free          format 999,999           heading "Free|(Mb)"
column used          format 999,999           heading "Used|(Mb)"
column pused         format 990.9             heading "%|Used|Space"
column fragmax       format 99,999.9          heading "Largest|Free|Ext.(Mb)"
column nbfrag        format 99999             heading "Nb|frag"
column contents      format a10               heading "Content"
column pct_ext_coal format 999                     heading "% Ext.|Coal."
column ext_manage    format a7 wrap           heading "Ext.|M."
column autoext       format a7 wrap           heading "Auto|Ext."
select
       contents
     , nvl (dt.tablespace_name, nvl (fsp.tablespace_name, 'Unknown')) tblsp
     , alloc
     , alloc - nvl (free, 0)       Used
     , nvl (free, 0)               Free
     , ((alloc - nvl (free, 0)) / alloc) * 100 pused
     , nbfrag
     , fragmax
     , dfsc.pct_ext_coal pct_ext_coal
     , dt.ext_manage
     , df.inc                           autoext
from
       ( select sum (bytes)/1048576     free
              , max (bytes)/1048576     fragmax
              , tablespace_name
              , count(*)                nbfrag
          from sys.dba_free_space
         group by tablespace_name
       ) fsp
    , ( select sum(bytes)/1048576      alloc
              , tablespace_name
              , Decode(((inc * &Var_DB_BLOCK_SIZE)/1024), Null, 'No', 'Yes')     inc
           from sys.dba_data_files sddf
              , sys.filext$        aut
          where sddf.file_id       = aut.file#   (+)
          group by tablespace_name
                 , Decode(((inc * &Var_DB_BLOCK_SIZE)/1024), Null, 'No', 'Yes')
          Union
          select sum(bytes)/1048576      alloc
               , tablespace_name
               , Decode(((increment_by * &Var_DB_BLOCK_SIZE)/1024), Null, 'No', 'Yes')    inc
            from sys.dba_temp_files sddf
           group by tablespace_name
                  , Decode(((increment_by * &Var_DB_BLOCK_SIZE)/1024), Null, 'No', 'Yes')
       ) df
    , ( select contents
              , tablespace_name
              , initial_extent/1024     initial_ext
              , next_extent/1024        next_ext
              , pct_increase
              , max_extents
              , min_extents
              , Substr(extent_management,1,5)       ext_manage
           from dba_tablespaces
       ) dt
     , ( select percent_extents_coalesced    pct_ext_coal
              , tablespace_name
           from dba_free_space_coalesced
       ) dfsc
where
       fsp.tablespace_name (+)   =   dt.tablespace_name
   and
       df.tablespace_name   (+)   =   dt.tablespace_name
   and
       dfsc.tablespace_name (+)   =   dt.tablespace_name
order
    by contents
     , pused desc
;Cheers,
Francisco Munoz Alvarez
http://www.oraclenz.com

Why IPC uses CRM as database and not R/3 ?

Hi ,
can any one help me with an answer for the following question :
<b>Why IPC uses CRM as database and not R/3 ?</b>
Points will be rewarded for helpful answer
thanks
ritu

Hi
IPC have Sales Pricing Engine, Pricing Configuration engine and TTE which helps to maintain the similar R3 pricing settings. As you are aware pricing in R3 is determined by Sales area, Cupp, DPP, so IPC is capable of determining the Pricing using same R3 standard procedure. T
This is not available in CRM, so CRM needs IPC to undertake the determine pricing/ calculate the pricing of the products.
Regards
Nagarj

Merge space within database.

Hi,
Our company is moving a production database from one storage subsystem to another, more efficient. Objects within the database are highly fragmanted. The data wihin the database uses about 1TB. If somebody performed a full export and an import to another database, the same data would need less than 600GB. There is an idea to recreate and rebuild all objects during the mentioned maintenance.
Full imp/exp is not an option as it would cause a long database outage what is not acceptable. My idea is to copy the whole database to the new storage, create a new tablesace and perioically (weekly) move several objects to it (using ALTER TABLE... MOVE and ALTER INDEX REUBUILT... TABLESPACE...). When all objects are moved, drop the old tablespace and realese space. Is there any other more convenient way to merge space within database?
The database uses a lot of small, 2GB files. Wouldn't it be better to create a smaller number of bigger files? Would it influence the performance of the database?
Thank you in advance,
Tim

Thank you very much for the reply!
The version that is currently used is 10.1.0.5 (EE).
To be honest mainly indexes are fragmented. We don't suffer from table's data chaining or migration.
I have made a full database export recently (using data pump) and imported it into an other database. In the source database indexes utilize about 500GB whereas in the target only about 300GB. The indexes haven't been rebuilt for ...years. According to many publications, index defragmentation vastly improves overall system performance, especially for queries that use index scans.
As I know during checkpoint the headers of all data files are updated with current SCN. I thought that decreasing the number of data files would decrease the number of writes. That's why I asked about performance differences.
In what way do you consider ASM as the perfect tool for migration?
Regards,
Tim

IPod empty, still showing used space

So after disconnecting my ipod after charging/adding songs, it shows ther is no music within despite there being ~120GB of used space. When I connect to iTunes it says "iTunes cannot read the contents of the iPod "OWNER'S IPO".
Go to the Summary tab in iPod preferences and click Restore to restore this iPod to factory settings."
Is there any way to recover what's on there, or am I screwed?

*Recover media from iPod*
Check out this post from Zevoneer for some iPod recovery options.
http://discussions.apple.com/thread.jspa?messageID=6273675&#6273675
Some of the tools require a working iPod database which, in your case, I suspect has been corrupted. I've successfully helped out friends using the manual recovery method mentioned towards the end which doesn't rely on the library.
tt2

"Connection is closed" closed error while using MS Access database

We are using MS Access database in our project. Recently the database was upgraded to 2000.
After upgrading the database, I get the folowing error when getAutoCommit() is called on a connection -
java.sql.SQLException: Connection is closed
at sun.jdbc.odbc.JdbcOdbcConnection.validateConnection(Unknown Source)
at sun.jdbc.odbc.JdbcOdbcConnection.getAutoCommit(Unknown Source)
The connection is not closed explicity before getAutoCommit() is called, only the statement is closed.
This error is sporadic and occurs under load scenario only (when a lot of connections are open). Once the error occurs, all the database calls fail then onwards. The error was not occuring before the database was upgraded.
I suspect the jbdc-odbc driver. The driver might not be compatible with Access2000 database. Under load scenario, it might be closing connections automatically.
Has anybody faced similar problem before? Where can I find the compatible jdbc-odbc driver? And how to ensure that it is jdbc-odbc driver problem only?
The database verison - MS Access 2000
Java version - 1.3.1_01

can i just point out that there is no support for transactions in Access so I wonder why you are calling autoCommit methods at all...

How to use your own database with your users to authenticate in a Web app?

Hello, everybody!
I'm starting to write my first web application and I'm going to use JSF, JPA and EJB3 in this application. One of the first things that I have to do on it is the authentication part where I'll have a page with a user name and a password for the user to login. So, as I'm new to all this in Java (I've already implemented this on .NET in the past), I was studying the Java EE 5 Tutorial, especifically the section "Example: Using Form-Based Authentication with a JSP Page". But I saw that the users that the sample application uses come from the file realm on the Application Server. The users are created there and assigned a name, a password and a group. After the users are in the Application Server we can simply uses forms authentication declaratively in the deployment descriptor (web.xml).
But the problem is that this doesn't work to me as I already have my own database with my users, so I want to use it instead of having to create the users on the Application Server.
So, I'm asking you how to do that. Of course I'm not expecting that you place the code here to me as I know that such a thing could be complicated. Instead, I'm asking if you know about some tutorial, article, book or something that teaches how to do what I want. But I would like to see theses examples using JSF and/or EJB3 because these are the technologies that I'm using to develop. It's a pity that the Java EE 5 Tutorial doesn't have an example using a custom database as I know that this situation is very common in the majority of web sites.
Thank you very much.
Marcos

From memory, it goes like this... You just create a
raw jdbc connection on your user database using a
special "login" DB user account, which has
permissions only to an "authenticate" stored query,
which accepts two arguments: username & password, and
returns a boolean 0 or 1 rows found.When I implemented this in .NET's ASP.NET I had the same solution. I had an special user created in the database that I used to log in. When the real user entered his username and password I was already logged in and I had just to check his username and password agains the right table in my database.
But that was only possible bacause when I connected to the database using my hidden user, I used the rights APIs in ASP.NET that coordinate the authentication process. This means that before login in, no one could access any resources (pages, atc...). So what I'm saying is that I can't manager this manually in Java. Java has to have some API or whatever to allow me to control the login process programmatically, while letting the Application Server control the access to the resources.

Calculate used space in database!

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