Hi, You should not compare tkprof outputs with V$SQL,V$SQLAREA. Because, recursive/child statistics are included in their parent statements in these views. But, tkprof substructs recursive statistics. I mean tkprof reports real values for statements, but dictionary doesn't.
regards... "Orr, Steve" wrote: > Here's the scene: > > 1) I have a 400,000 row table table which is cached. > > 2) I have a query against that table and no other with one column referenced > in the WHERE clause. (This column is indexed and of course I don't really > need the index since the table is cached but it's there so ho hum...) > > 3) When I run tkprof on the query it shows a full table scan ignoring the > index... that's what I want 'cause it's cached. > > 4) But when I look at V$SQLAREA the DISK_READS column is incremented. > > 5) This query is executed very often so my StatsPack report lists it as one > of the most expensive queries in terms of physical reads. > > It appears that Oracle is counting full table scans of cached tables as > DISK_READS in V$SQLAREA. Seems like this is a bug to me 'cause it's not > really a physical disk read but is getting data from the buffers. > > Don't you think this is a bug? Has anyone seen this before? > > Steve Orr > Looking for cache in Bozeman, Montana > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: Orr, Steve > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 > San Diego, California -- Public Internet access / Mailing Lists > -------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). -- Danisment Gazi Unal http://www.ubTools.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Danisment Gazi Unal (ubTools) INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
