RE: LOG_BUFFER Parameter Question
Thanks to all of you on this issue... -Original Message-From: Gogala, Mladen [mailto:[EMAIL PROTECTED]]Sent: Wednesday, April 24, 2002 8:12 PMTo: Multiple recipients of list ORACLE-LSubject: RE: LOG_BUFFER Parameter Question Alternatively, you size it until redo_log_space_wait goes away from v$system_events. -Original Message-From: Anjo Kolk [mailto:[EMAIL PROTECTED]]Sent: Wednesday, April 24, 2002 4:59 AMTo: Multiple recipients of list ORACLE-LSubject: Re: LOG_BUFFER Parameter QuestionYep, wrong tree. size it like: redo blocks per tx * tx/sec * 3/2 *physical blocksize Anjo. Denham Eva wrote: Hello, I have been wondering about how to work out what the optimal LOG_BUFFER parameter, compared to the physical size of the REDOLOG file, for the best optimization and writes from buffer to log. Or am I barking up the wrong tree? Is there some other way of doing this. i.e. redolog file size is 10M and LOG_BUFFER is 512000. Can this be optimized better? Denham Eva Oracle DBA In UNIX Land On a quiet Night, you can hear the Windows machines reboot. This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal - For more information please visit www.marshalsoftware.com This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal - For more information please visit www.marshalsoftware.com
Re: LOG_BUFFER Parameter Question
Yep, wrong tree. size it like: redo blocks per tx * tx/sec * 3/2 *physical blocksize> Anjo. Denham Eva wrote: Hello, I have been wondering about how to work out what the optimal LOG_BUFFER parameter, compared to the physical size of the REDOLOG file, for the best optimization and writes from buffer to log. Or am I barking up the wrong tree? Is there some other way of doing this. i.e. redolog file size is 10M and LOG_BUFFER is 512000. Can this be optimized better? Denham Eva Oracle DBA In UNIX Land On a quiet Night, you can hear the Windows machines reboot. This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal - For more information please visit www.marshalsoftware.com
Re: LOG_BUFFER Parameter Question
log buffer gets written a) every 3 seconds b) every commit (more or less) c) 1/3 full d) 1M full thus its unrelated to redo log file size, and in most cases unlikely that anything above 512k-1m is going to give benefits. Check for 'log buffer waits' in your statspack data. hth connor --- Denham Eva [EMAIL PROTECTED] wrote: Hello, I have been wondering about how to work out what the optimal LOG_BUFFER parameter, compared to the physical size of the REDOLOG file, for the best optimization and writes from buffer to log. Or am I barking up the wrong tree? Is there some other way of doing this. i.e. redolog file size is 10M and LOG_BUFFER is 512000. Can this be optimized better? Denham Eva Oracle DBA In UNIX Land On a quiet Night, you can hear the Windows machines reboot. # This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal For more information please visit www.marshalsoftware.com # = Connor McDonald http://www.oracledba.co.uk (mirrored at http://www.oradba.freeserve.co.uk) Some days you're the pigeon, some days you're the statue __ Do You Yahoo!? Everything you'll ever need on one web page from News and Sport to Email and Music Charts http://uk.my.yahoo.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: =?iso-8859-1?q?Connor=20McDonald?= 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).
Re: LOG_BUFFER Parameter Question
Title: LOG_BUFFER Parameter Question Are you seeing any significant times from wait-events related to redo log buffering? - Original Message - From: Denham Eva To: Multiple recipients of list ORACLE-L Sent: Tuesday, April 23, 2002 11:58 PM Subject: LOG_BUFFER Parameter Question Hello, I have been wondering about how to work out what the optimal LOG_BUFFER parameter, compared to the physical size of the REDOLOG file, for the best optimization and writes from buffer to log. Or am I barking up the wrong tree? Is there some other way of doing this. i.e. redolog file size is 10M and LOG_BUFFER is 512000. Can this be optimized better? Denham Eva Oracle DBA In UNIX Land On a quiet Night, you can hear the Windows machines reboot. This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal - For more information please visit www.marshalsoftware.com
RE: LOG_BUFFER Parameter Question
Alternatively, you size it until redo_log_space_wait goes away from v$system_events. -Original Message-From: Anjo Kolk [mailto:[EMAIL PROTECTED]]Sent: Wednesday, April 24, 2002 4:59 AMTo: Multiple recipients of list ORACLE-LSubject: Re: LOG_BUFFER Parameter QuestionYep, wrong tree. size it like: redo blocks per tx * tx/sec * 3/2 *physical blocksize Anjo. Denham Eva wrote: Hello, I have been wondering about how to work out what the optimal LOG_BUFFER parameter, compared to the physical size of the REDOLOG file, for the best optimization and writes from buffer to log. Or am I barking up the wrong tree? Is there some other way of doing this. i.e. redolog file size is 10M and LOG_BUFFER is 512000. Can this be optimized better? Denham Eva Oracle DBA In UNIX Land On a quiet Night, you can hear the Windows machines reboot. This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal - For more information please visit www.marshalsoftware.com
Re: LOG_BUFFER Parameter Question
On Wed, Apr 24, 2002 at 10:12:22AM -0800, Gogala, Mladen wrote: Alternatively, you size it until redo_log_space_wait goes away from v$system_events. it is v$system_event -Original Message- Sent: Wednesday, April 24, 2002 4:59 AM To: Multiple recipients of list ORACLE-L Yep, wrong tree. size it like: redo blocks per tx * tx/sec * 3/2 *physical blocksize Anjo. Denham Eva wrote: Hello, I have been wondering about how to work out what the optimal LOG_BUFFER parameter, compared to the physical size of the REDOLOG file, for the best optimization and writes from buffer to log. Or am I barking up the wrong tree? Is there some other way of doing this. i.e. redolog file size is 10M and LOG_BUFFER is 512000. Can this be optimized better? Denham Eva Oracle DBA In UNIX Land On a quiet Night, you can hear the Windows machines reboot. _ This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal - For more information please visit www.marshalsoftware.com http://www.marshalsoftware.com _ -- === Ray Stell [EMAIL PROTECTED] (540) 231-4109 KE4TJC28^D -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Ray Stell 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).
LOG_BUFFER Parameter Question
Title: LOG_BUFFER Parameter Question Hello, I have been wondering about how to work out what the optimal LOG_BUFFER parameter, compared to the physical size of the REDOLOG file, for the best optimization and writes from buffer to log. Or am I barking up the wrong tree? Is there some other way of doing this. i.e. redolog file size is 10M and LOG_BUFFER is 512000. Can this be optimized better? Denham Eva Oracle DBA In UNIX Land On a quiet Night, you can hear the Windows machines reboot. This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal - For more information please visit www.marshalsoftware.com
