Tuning Question and Advice needed ..

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

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Author: Bunyamin K. Karadeniz
  INET: bunyamink_at_havelsan.com.tr

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