What is a local write wait?
Was creating an index with a degree of 4, and in unrecoverable manner? There were few waits for an event called "local write wait". Can anyone shed more light on this wait? Thanks Raj -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: 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).
Re: What is a local write wait?
Rajesh: Typically DBWR has to free up some buffers when you want to read something from the disk. During this process there are chances that you will be waiting for your local buffer (i.e blocks dirtied/invalidated by your session) to be written to disk. During this time the waits are shown as local write waits. BTW do you have any other write waits or just seeing local waits? And also are you noticing any timeouts for this waits? Typically we wait for local wait up to one second and spin (or retry) again.. Timeouts for local write indicates a serious problem unless you have tiny buffer cache or extremely slow disk' KG - Original Message - To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> Sent: Saturday, November 01, 2003 12:54 PM > Was creating an index with a degree of 4, and in unrecoverable manner? > There were few waits for an event called "local write wait". Can anyone > shed more light on this wait? > > Thanks > Raj > > > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: > 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.net -- Author: K Gopalakrishnan 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).
RE: What is a local write wait?
I found this on the Metalink: http://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_datab ase_id=FOR&p_id=183745.995 Waleed -Original Message- Sent: Saturday, November 01, 2003 2:24 AM To: Multiple recipients of list ORACLE-L Was creating an index with a degree of 4, and in unrecoverable manner? There were few waits for an event called "local write wait". Can anyone shed more light on this wait? Thanks Raj -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: 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.net -- Author: Khedr, Waleed 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).
Re: What is a local write wait?
Thanks KG. There were underlying OS I/O issues. The SA is looking to fix the same. Regards Raj __ Rajesh L. Rao DCI - Triad, Oracle DBA IBM Global Services, JPMC Account Phone: 516 5746065 E-mail: [EMAIL PROTECTED] "K Gopalakrishnan To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> "cc: <[EMAIL PROTECTED] Subject: Re: What is a local write wait? o.com> Sent by: [EMAIL PROTECTED] ity.com 11/01/2003 09:54 AM Please respond to ORACLE-L Rajesh: Typically DBWR has to free up some buffers when you want to read something from the disk. During this process there are chances that you will be waiting for your local buffer (i.e blocks dirtied/invalidated by your session) to be written to disk. During this time the waits are shown as local write waits. BTW do you have any other write waits or just seeing local waits? And also are you noticing any timeouts for this waits? Typically we wait for local wait up to one second and spin (or retry) again.. Timeouts for local write indicates a serious problem unless you have tiny buffer cache or extremely slow disk' KG - Original Message - To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> Sent: Saturday, November 01, 2003 12:54 PM > Was creating an index with a degree of 4, and in unrecoverable manner? > There were few waits for an event called "local write wait". Can anyone > shed more light on this wait? > > Thanks > Raj -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: 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).
Re: What is a local write wait?
This event is one of those 'you would never see' in normal database operations. As I have mentioned in my earlier post, existance of this event translates in to some serious I/O issues or broken disk in RAID05 or something similar to that.. - Original Message - To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> Sent: Monday, November 03, 2003 10:24 PM > > Thanks KG. > > There were underlying OS I/O issues. The SA is looking to fix the same. > > Regards > Raj > __ > Rajesh L. Rao > DCI - Triad, Oracle DBA > IBM Global Services, JPMC Account > Phone: 516 5746065 > E-mail: [EMAIL PROTECTED] > > > > > > "K > Gopalakrishnan To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> > " cc: > <[EMAIL PROTECTED] Subject: Re: What is a local write wait? > o.com> > Sent by: > [EMAIL PROTECTED] > ity.com > > > 11/01/2003 > 09:54 AM > Please respond > to ORACLE-L > > > > > > > Rajesh: > > Typically DBWR has to free up some buffers when you want to read something > from the disk. During this process there are chances > that you will be waiting for your local buffer (i.e blocks > dirtied/invalidated by your session) to be written to disk. During this > time > the > waits are shown as local write waits. > > BTW do you have any other write waits or just seeing local waits? And also > are you noticing any timeouts for this waits? Typically > we wait for local wait up to one second and spin (or retry) again.. > Timeouts > for local write indicates a serious problem unless you > have tiny buffer cache or extremely slow disk' > > > KG > > > > - Original Message - > To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> > Sent: Saturday, November 01, 2003 12:54 PM > > > > Was creating an index with a degree of 4, and in unrecoverable manner? > > There were few waits for an event called "local write wait". Can anyone > > shed more light on this wait? > > > > Thanks > > Raj > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: > 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.net -- Author: K Gopalakrishnan 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).
