Tuning Question and Advice needed ..

[Bunyamin K. Karadeniz]

Dear Gurus , I need your help ..   I run UTLBSTAT and then after 2 hour run the UTLESTAT.sql scripts as internal and  look at the report.txt generated ...   On report.txt , I see that   System wide wait events for background processes: System wide wait events for non-background processes : Latch statistics Statistics on no_wait gets of latches Sum IO operations over tablespaces   and other things also is in the report.   Question 1) What I wonder is  Are these values between the start and end times of scripts. What I mean is  , for example  Is the wait events for non-background processes list in report are the wait events occured between UTLBSTAT script run time T1 and UTLESTAT script run time T2   ? or  are they total wait events from the startup of   database ?   Question 2) I see lots of wait events occur .. What will I give importance to ? will I try to make 0 wait event in report. What are the optimums of wait events. ? For example I see    "Latch free event" occured for 3015 times , "control file sequential read" occured for 182 times , "log file sync" occured for 1756 times "direct path read" occured for 11000 times "direct path write" occured for 6000 times   Are these values normal ? Will I try to make them 0 in the tomarrows report ?   How can I comment on the report ? Is there a link you can tell me to understand the problems and will help me to read and action about the problems ?   Thank you...                   Bunyamin K. Karadeniz           Oracle DBA / Developer Civilian IT Department Havelsan A.S. Eskisehir yolu 7.km Ankara Turkey Phone: +90 312 2873565 / 1217 Mobile : +90 535 3357729