RE: explain plan, can you explain this?
Date: Fri, 11 Jan 2008 11:04:51 +0200
Andrew, AWR reports delta values, not cumulative statistics.
It reports the delta values from the columns of dba_hist_sqlstat like buffer_gets_delta.
Here is a part of an sql run by a 10.2 awrrpt.sql
sum(disk_reads_delta) dskr, sum(executions_delta) exec,
sum(cpu_time_delta) cput, sum(elapsed_time_delta)elap
where dbid = :dbid and instance_number = :inst_num and :bid < snap_id and snap_id
group by sql_id)
From: Andrew Kerber [mailto:andrew.kerber_at_gmail.com]
Sent: Thursday, January 10, 2008 7:57 PM
Cc: Yasin Baskan; dannorris_at_dannorris.com; Oracle L Subject: Re: explain plan, can you explain this?
And then, you have to do it again for AWR. AWR does report cumulative statistics.
On Jan 10, 2008 11:36 AM, John Kanagaraj <john.kanagaraj_at_gmail.com > wrote:
> John, are you sure that statspack reports sql statistics cumulatively?
Yasin and Allen,
You are right: My bad. STATSPACK indeed does report the differences. This myth of mine was self-created, probably from early days of STATSPACK. Thank you for setting me right. This reminds me once more to re-validate everything I know.
-- John Kanagaraj <>< DB Soft Inc http://www.linkedin.com/in/johnkanagaraj http://jkanagaraj.wordpress.com (Sorry - not an Oracle blog!) ** The opinions and facts contained in this message are entirely mine and do not reflect those of my employer or customers ** -- http://www.freelists.org/webpage/oracle-l -- Andrew W. Kerber 'If at first you dont succeed, dont take up skydiving.' -- http://www.freelists.org/webpage/oracle-lReceived on Fri Jan 11 2008 - 03:04:51 CST