Re: General Instance Performance Monitoring

John,

>  What is the best tool to use for general instance performance monitoring:
> statspack or awr? It seems that these both tools produce nearly identical

There are many differences: Cost for one. As per the doc, you will
need a license to even view the AWR related data via SQL. However, it
does seem that STATSPACK on 10g does this without cost. STATSPACK does
suffer from issues it always had: It is not configued out of the box,
you need to maintain it, and the biggest one: STATSPACK collects Top
SQL by scanning V$SQL based on out of box limits, so depending on
these limits and the state of SQL in the shared pool, it might miss
some SQL that did create the issue during the period of interest. (It
does report the difference in stats for the captured SQL).

OTOH, STATSPACK in 10g does capture and report certain stats that AWR
does not. (I will be talking about this - among other stuff - at
COLLAB 08). For e.g. SP reports the Host and Instance CPU stats, as
well as File, Temp File and Event Histograms. Details in my paper...

-- 
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 **
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