I attended your Mastering Oracle Trace Data one day seminar in London last year. I have last week, successfully reduced the User I/O Wait times by over 64%, and for one query, reduced the PIO from 15,000,000 per day to 4,000 per day. All this was achieved by analysis using Oracle Extended Trace files and MRSKEW.
MRSKEW made the analysis so much easier, processing gigabytes of trace file data in a matter of minutes. This is without doubt, the best £400 my company has spent.
BAE Systems, Warton, England