Alex, Did you get an explanation for those suggestions? It would be difficult for us to comment on those changes without any additional details.. However, However,However, 20 DBWriters are certainly high for your configuration ;) Have a nice day !! ------------------------------------------------------------ Best Regards, K Gopalakrishnan, Co-Author: Oracle Wait Interface: Oracle Press 2004. http://www.amazon.com/gp/product/007222729X/ Coming Soon: Oracle RAC Handbook, Oracle Press 2006 http://www.amazon.com/gp/product/007146509X/ ----- Original Message ---- From: amonte <ax.mount@xxxxxxxxx> To: oracle-l@xxxxxxxxxxxxx Sent: Wednesday, September 6, 2006 1:39:51 AM Subject: excessive number of db writer Hi I have been suggested by some Oracle Consultant to set 20 Database Writer in a 12 CPU HP-UX Server. Does anyone know what are the side effects of having excessive DBWR? I detected a higher CPU usage (between, 1% to 2%) not sure if its due to the number of Database Writer. Because when I increased the number of DBWR at init.ora I also changed these parameters _row_cache_cursors = 60 _kgl_latch_count = 59 _kghdsidx_count = 4 statistics_level = basic again suugested by this guy. TIA Alex