I'm surprised that no one has mentioned that <http://www.amazon.com/exec/obidos/search-handle-url/ref=ntt_athr_dp_sr_ 1?%5Fencoding=UTF8&search-type=ss&index=books&field-author=Kirtikumar%20 Deshpande> Kirtikumar Deshpande has also written a book on the subject: Oracle Streams: A Practical Guide for Data Replication & Information Sharing. I haven't read it, but he did co-author the superb: <http://www.amazon.com/Oracle-Performance-Tuning-Krishna-Vaidyanatha/dp/ 0072131454/ref=sr_1_2?ie=UTF8&s=books&qid=1224690184&sr=1-2> Oracle Performance Tuning 101 David Roberts www.logica.com Logica UK Limited Registered in England and Wales (registered number 947968) Registered office: Stephenson House, 75 Hampstead Road, London NW1 2PL, United Kingdom This e-mail and any attachment is for authorised use by the intended recipient(s) only. It may contain proprietary material, confidential information and/or be subject to legal privilege. It should not be copied, disclosed to, retained or used by, any other party. If you are not an intended recipient then please promptly delete this e-mail and any attachment and all copies and inform the sender. Thank you.