New OWI Views in Oracle Database 10g Release 1
Oracle Database 10g Release 1 contains several nice enhancements to the OWI, such as the wait event classification, the wait event history, and wait event metrics. Several new V$ views are also added to OWI, and the V$SESSION view has been enhanced to include wait event information.
Historical information has been lacking from the Oracle wait events views. Low-level historical data simply doesn’t exist, and DBAs have to rely on high-level data from V$SESSION_EVENT, V$SYSTEM_EVENT and the Statspack utility for performance diagnosis. This view retains the 10 most recent wait events for each connected session. This is not a complete history, but it is a step in the right ...