Slow performance/response

All -

I have not done tuning a great deal so bear with me.  I currently have a 
table that consists of 10 million rows - warehouse.  The largest table I 
have.  A few months ago a query took around 30 minutes to run against 
this table.  This was acceptable.  Now the query takes almost 5 hours!!!

   The db is 9.2.0.4 running on aix 5.2.  I have stats that I ran on the 
db during the query run and it shows the db working but not maxed out. 
The tablespace is at 75% used, not seeing waits.  There is alot of disk 
reads.  No disk sorts.  I am seeing a high 'Physical Blks per Read %' 
but I am attrbiuting that to the datafiles being on one disk.  I do plan 
on rearranging them after the query finishes and hope this helps.

I am looking for other ideas of what could be wrong with the table or 
places to look.  I will continue to search for ideas at metalink and in 
the books.


Lee


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