No I checked, the problem started when the table and index grow up to a limit size (some day in january). before the table were too small and I had to set the parameters to get the optimizer use the index, now after 5 years had grown up to the point one or more execution paths changed and the configuration became self-defeating. On 2/7/06, Grabowy, Chris <chris.grabowy@xxxxxxxx> wrote: > > Just curious, was Oracle upgraded? Patched? > > ------------------------------ > *From:*oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] > *On Behalf Of *Juan Carlos Reyes Pacheco > *Sent:* Tuesday, February 07, 2006 12:21 PM > *To:* Mike Killough > *Cc:*oracle-l@xxxxxxxxxxxxx; jonathan@xxxxxxxxxxxxxxxxxx > *Subject:* Re: The responsible > > Hi Mike, the parameters was ok, and they solved the problem (5 years ago) > But 5 years after (now), the situation reversed and I had to comment them > out. > To get the optimize choose the right way. > > On 2/7/06, Mike Killough <mwkillough@xxxxxxxxxxx> wrote: > > > > This is why I always set the parameters generic in test and force them > > to > > reprove their need, before including them in the upgrade. > > > > Mike > > > > > > > > >From: Juan Carlos Reyes Pacheco < juancarlosreyesp@xxxxxxxxx> > > >Reply-To: juancarlosreyesp@xxxxxxxxx > > >To: oracle-l@xxxxxxxxxxxxx, jonathan@xxxxxxxxxxxxxxxxxx > > >Subject: The responsible > > >Date: Tue, 7 Feb 2006 12:46:54 -0400 > > > > > >HI I want to share this info, not asking. > > > > > >Some years ago I changed the optimizer parameters, and this solved a > > query, > > >from minutes to seconds > > >OPTIMIZER_INDEX_COST_ADJ = 10 > > >OPTIMIZER_INDEX_CACHING = 90 > > >Now the situation reversed, and I had to comment them > > >To move a process from 4 minutes to 7 seconds. > > > > > >using optimizer parameters 10,90 > > >trace file 870 M > > >time 4 minutes (without trace) > > >recursive 465.43 s > > >non recursive 233.21 s > > > > > > > > >commenting optimizer parameters and leaving with their defaults > > >Trace file 6 M > > >time 7 seconds > > >recursive 5.87 s > > >non recursive 1.79 s > > > > > > > > > > > > > > > > > > > > >-- > > >Oracle Certified Profesional 9i 10g > > >Orace Certified Professional Developer 6i > > > > > >8 years of experience in Oracle 7,8i,9i,10g and developer 6i > > > > > > > > > -- > Oracle Certified Profesional 9i 10g > Orace Certified Professional Developer 6i > > 8 years of experience in Oracle 7,8i,9i,10g and developer 6i > -- Oracle Certified Profesional 9i 10g Orace Certified Professional Developer 6i 8 years of experience in Oracle 7,8i,9i,10g and developer 6i