Guys, I am looking for some UNIX help here. I have a huge 10046 trace and trying to create a histogram for wait times. (something like V$event_histogram from trace file). Anyone has any working examples? Best Regards, K Gopalakrishnan Oracle Database 10g Real Application Clusters Handbook http://www.amazon.com/gp/product/007146509X/ Oracle Wait Interface: A Practical Guide to Performance Diagnostics & Tuning http://www.amazon.com/exec/obidos/tg/detail/-/007222729X/