RE: SORT_AREA_SIZE question

[Farnsworth, Dave]

You want a sorts to disk ratio of 1 percent or less.  To find this run this;   dispatch> column name format a30 dispatch> select name, value   2  from v$sysstat   3  where name like 'sort%';   NAME                               VALUE ------------------------------ --------- sorts (memory)                    283420 sorts (disk)                          64 sorts (rows)                    29507963     the ratio of sorts = round((64/283420)*100,3) ratio of sorts = 0.023%   Learned this from the Oracle DBA 101 book, one of the best buys I made.   Dave -----Original Message----- From: Bart Kersteter [mailto:[EMAIL PROTECTED] Sent: Wednesday, June 25, 2003 9:39 AM To: Multiple recipients of list ORACLE-L Subject: SORT_AREA_SIZE question Hello,   I joined this list last week, so I apologize in advance if I'm asking a question that has previously been answered.   I am responsible for a reporting database/data mart that is approximately 175 GB.  Our main fact table ranges from 1-14 GB depending upon how far along we are into our financial year.  I have large reports that run full table scans on this table daily.  In an effort to keep as much of the sorting in memory as possible I have specified SORT_AREA_SIZE to be 100MB.  Some of the tuning books I am reading now are making me second-guess myself and I am wondering if this is overkill.   Can anyone provide some advice on how large they are setting their SORT_AREA_SIZE values for their DSS systems?    Thanks in advance,   Bart   Please Note The information in this E-mail message is legally privileged and confidential information intended only for the use of the individual(s) named above. If you, the reader of this message, are not the intended recipient, you are hereby notified that you should not further disseminate, distribute, or forward this E-mail message. If you have received this E-mail in error, please notify the sender. Thank you