Here's a script (for Oracle 8) that will show you exactly how much space a
given table uses, as opposed to how much space its extents have reserved.
It takes one parameter, the name of the table being looked at. It can take
a long time to run so I'm not sure if that counts as efficient. If you
want to see tablespace fragmentation, then run the mapper script down
below.
rem ****************************************************
rem this code was inspired by Kevin Loney
rem ****************************************************
set verify off;
set pages 24;
select COUNT(DISTINCT(SUBSTR(a.ROWID,1,16)))* b.value
Bytes_Used from &&1 a,
v$parameter b where b.name = 'db_block_size' group by b.value
/
MAPPER
rem
rem file: mapper.sql
rem location: $HOME/sql
rem parameters: the tablespace name being mapped
rem
rem Sample invocation:
rem @mapper SYSTEM
rem
rem This script generates a mapping of the space usage
rem (free space vs used) in a tablespace. It graphically
rem shows segment and free space fragmentation.
rem
set pagesize 66 linesize 132 verify off
ttitle 'Map of Tablespace ' &&1 right datevar skip 1
column substr(file_id,1,4) heading "File|Id"
column bytes format 999,999,999,999
column today noprint new_value datevar
SELECT
to_char(sysdate, 'MM/DD/YY') today,
'free space' owner, /*"owner" of free space*/
' ' object, /*blank object name*/
substr(file_id,1,4), /*file ID for the extent header*/
block_id, /*block ID for the extent header*/
blocks, /*length of the extent in blocks*/
bytes /*length of the extent in bytes*/
FROM sys.dba_free_space
WHERE tablespace_name = upper('&&1')
UNION
SELECT
to_char(sysdate, 'MM/DD/YY') today,
substr(owner,1,10), /*owner name (first 20 chars)*/
substr(segment_name,1,27), /*segment name (first 26 chars)*/
substr(file_id,1,4), /*file ID for extent header*/
block_id, /*block ID for block header*/
blocks, /*length of the extent in blocks*/
bytes /*length of the extent in bytes*/
FROM sys.dba_extents
WHERE tablespace_name = upper('&&1')
ORDER BY 4,5
/
undefine 1
"Michael
Netrusov" To: Multiple recipients of list ORACLE-L
<[EMAIL PROTECTED] <[EMAIL PROTECTED]>
> cc:
Sent by: Subject: Re: Efficient way to monitor
table
root@fatcity. growth...
com
08/27/2001
07:40 PM
Please
respond to
ORACLE-L
Analyze tables then look at dba_tables.num_rows. Doing it on a daily will
give you what you want.
HTH,
Michael
----- Original Message -----
To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]>
Sent: Monday, August 27, 2001 15:58
> Hi DBA's
>
> Does an Oracle Stored Procedure or function exist that returns the row
count
> by table in each tablespace?
> I've observed that one of our production tablespaces is has only 8% free
> space. Perhaps it could be fragmented. I'll have to find a script that
can
> provide these statistics. I know I'll need to add another datafile to the
> tablespace soon.
> However, I'd like to find out which are the active tables in each
tablespace
> and track the row insert growth on a daily basis.
>
> Any ideas?
>
> Thanks for your help.
>
> Denmark Weatherburne
> Belize
> "Knowledge is power, but it is only useful if it is shared!"
>
> _________________________________________________________________
> Get your FREE download of MSN Explorer at
http://explorer.msn.com/intl.asp
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Denmark Weatherburne
> INET: [EMAIL PROTECTED]
>
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