Hi Kim, Ahamed Alomari (Oracle8i and Unix Performance Tuning p142-143)discusses this in more detail. However I don't think this is more relevant with the Async IO and multiple DB Writers.
But this is a serious issue in older versions (oracle 7 and below) because the number of Asnyc IO thread requests were limited by a kernel constant (forgot the name btw) and exceeding this fills the alert logs with "Out of Async IO requests". This restriction was lifted in Oracle 8.0.3 and I think this is no more a problem. IIRC the number was 200 (200 requests per process) Best Regards, K Gopalakrishnan Bangalore, INDIA -----Original Message----- Smith Sent: Tuesday, March 05, 2002 5:48 AM To: Multiple recipients of list ORACLE-L Do you know of a web site where I could research particular thought on? I have not seen anything like that in my research. Thanks. -----Original Message----- [EMAIL PROTECTED] Sent: Monday, March 04, 2002 8:53 PM To: Multiple recipients of list ORACLE-L In a UNIX system it is better to have more small size datafiles than a few or one large datafile: The reason is that UNIX aquires an exclusive file write lock and therefore if you use multiple files you will avoid a situation where multiple simultaneous writes to data files become serialized and consequently reduce I/O performance: For example instead of one 2GB Data file , split it into 8 250mb: By the way I am addressing OLTP type systems with this e-mail -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Kimberly Smith INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: K Gopalakrishnan INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
