log_checkpoint_interval is specified in number of OS Blocks. Depending upon the size of ur OS Block it will force a checkpoint after that many number of bytes written in the redo buffers.
Normally it should be a divisor of the redo log size, means for 500MB it should be 1MB, 2MB, 5MB but not 7 MB because 500/7 doesn't give an integer value. Setting it to more than the size of the redo-logs, gives no advantage, it will only ir-regularize the checkpoints. Usually, increasing the checkpoint interval increases the performance by reducing the checkpoint frequency. There is no upper limit, but I don't know what will happen if u set it to zero. What was the exact performance problem that u faced? Regards Naveen -----Original Message----- Sent: Tuesday, October 08, 2002 4:09 PM To: Multiple recipients of list ORACLE-L Qs log_checkpoint_interval - Is there any Upper Limit to Setting it's Value on Oracle 8.1.7 ? NOTE - On a Hybrid 150 GB Database (Oracle 7.3.4) on setting increasing it's Value from 4,70,000 to 10,00,000 we had faced a Huge performance problem & had Scaled it Down back to 4,70,000 NOTE - Online Redo Logs were of Size 500 MB Each Qs Does Setting log_checkpoint_timeout to 0 Disable the Same ? -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: VIVEK_SHARMA INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- 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: Naveen Nahata INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- 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).
