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Home -> Community -> Mailing Lists -> Oracle-L -> RE: wait event puzzler
A SINGLE block? I was convinced that it was <= DB_FILE_MULTIBLOCK_READ_COUNT
blocks.
Are you sure?
Mladen Gogala
Oracle DBA
Phone:(203) 459-6855
Email:[EMAIL PROTECTED]
-----Original Message-----
Sent: Wednesday, June 11, 2003 2:19 PM
To: Multiple recipients of list ORACLE-L
Dennis:
THe event 'db file sequential read' is NOT always an INDEX Scan. It is just a single block read which TYPICALLY happens during an INDEX scan. The word 'TYPICALLY' is the key here.
Best Regards,
K Gopalakrishnan
-----Original Message-----
Meng, Dennis
Sent: Wednesday, June 11, 2003 11:02 AM
To: Multiple recipients of list ORACLE-L
Good day all,
We have a bunch of queries in our data warehouse environment that are taking
a long time to complete.
I did a select on v$session_wait on one of the queries when it is running
and it shows the wait event to be 'db file sequential read', which means it
is scanning index blocks, correct? But when I put the p1 p2 p3 values into
another query to see which segment it belongs to, it shows me a table, not
an index. How can this be?
TIA
Dennis
-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Meng, Dennis 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-LReceived on Wed Jun 11 2003 - 12:52:23 CDT
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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
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also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Gogala, Mladen 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
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