Performance problems with db file sequential read can happen for two reasons: 1) you are doing too many I/O 2) each I/O is too slow (now there can many reaons why I/O is slow).
So your solution of going with the INDEX_FFS hint is too reduce the number of I/O. Well what if the problem is that the I/O is too slow ? Anjo Kolk http://www.oraperf.com Robertson Lee - lerobe wrote: > All, > > Oracle 8.0.5.0.0 Tru64 4.0f > > We are having a performance issue with one of our applications and it looks > like it is pointing to the db file sequential reads event. I have been doing > some digging around and a recommendation in a book I have has suggested a > possible way to alleviate this is to use the INDEX_FFS hint in the query. > Anyone used this before ??. or indeed any other recommendations where I > should be looking. > > Regards > > Lee > > The information contained in this communication is > confidential, is intended only for the use of the recipient > named above, and may be legally privileged. If the reader > of this message is not the intended recipient, you are > hereby notified that any dissemination, distribution or > copying of this communication is strictly prohibited. > If you have received this communication in error, please > re-send this communication to the sender and delete the > original message or any copy of it from your computer > system. > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: Robertson Lee - lerobe > 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: Anjo Kolk 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).
