DBMS_SPACE(9i) for tablespace growth trend..?

Question

Hello,
for 10G, dbms_space.object_growth_trend() can expect table's growth....
for 9i (9.2.0.6 in Sun9) database, is there any friend has experience know how to do for the following purpose:
1. How to expect tablespace growth? say, to accommodate new data for the next 30 days we have to increase tablespace A by X GB, tablespace B by Y GB, … etc
2. How to expect database level growth? say, we need XXX GB more to accommodate new data for the year YYYY
3, Is there any way to Initialize (if possible) Segment Advisor with the information about segment trends we have already collected in 9i
Thank you in advance
Jerry

Answer 1

Hi..
AFAIK in 9i you can't find the Subprograms like object_growth_trend() package in dbms_space.
How to expect tablespace growth? I think that you will have to maintain a sheet of the tablespace usage.Daily you will need to maintain the tablespace size, used and free size of tablespace.Ans after few days of observation you can predict the approximate amount of size being filled up in a day.
You can use the below query to know the used and the free space in the tablespace.
select df.tablespace_name tspace,
    df.bytes/(1024*1024) tot_ts_size,
  (df.bytes/(1024*1024) -sum(fs.bytes)/(1024*1024)) Used_ts_size,
  sum(fs.bytes)/(1024*1024) free_ts_size,
        round(sum(fs.bytes)*100/df.bytes) free_pct,
  round((df.bytes-sum(fs.bytes))*100/df.bytes) used_pct1
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
order by 1
2. How to expect database level growth? Again same, you need to maintain a sheet for it.Use the below query
select sum(bytes/1024/1024/1024) Physical_size_gb from dba_data_files;
select sum(bytes/1024/1024/1024) Actual_size_gb from dba_segments; 3, Is there any way to Initialize (if possible) Segment Advisor with the information about segment trends we have already collected in 9iNo.
HTH
Anand
Edited by: Anand... on Jan 6, 2009 4:17 AM