Re: FTS, db file sequential read on undo
From: Scott <oraracdba_at_yahoo.com>
Date: Mon, 13 Apr 2009 11:51:05 -0700 (PDT)
Message-ID: <748941.77732.qm_at_web50506.mail.re2.yahoo.com>
Date: Mon, 13 Apr 2009 11:51:05 -0700 (PDT)
Message-ID: <748941.77732.qm_at_web50506.mail.re2.yahoo.com>
Sorry that undo bug I sent is not published but is the backport for AIX 5L Here is the one that is published for undo Bug: 6658921 ________________________________ From: Vladimir Barac <vbarac_at_Alghanim.com> To: "oracle-l_at_freelists.org" <oracle-l_at_freelists.org> Sent: Monday, April 13, 2009 9:36:12 AM Subject: FTS, db file sequential read on undo Hello, listers We are facing rather strange situation… When accessing table for analyze or to export table, we are seeing "db file sequential read" wait event. V$session_wait file# is 2, that is – UNDO tablespace. Because of this analyze or export take forever to complete. Why would analyze or export access UNDO tablespace? There are definitely no transactions at all on the system going on at the time of export/analyze. Thanks for all insights, Vladimir Barac Database administrator | Alghanim Industries P.O. Box 223 , Safat 13003 , Kuwait Tel: +965 1881 111 / ext. 2960 ______________________________________________________________________ This e-mail message and any attachments to it are for the sole use of the intended recipients and may contain confidential and privileged information. This e-mail message and any attachments are the property of Yusuf A. Alghanim & Sons w.l.l. or any of its subsidiaries or affiliates (“Alghanim Industries”). Any unauthorized review, use, disclosure, or distribution of this e-mail message or its attachments is prohibited. Any opinions expressed in this message are those of the author and do not necessarily reflect the opinion of Alghanim Industries. If you are not an intended recipient, please notify the sender by reply e-mail and destroy all copies of the original message and any attachments. ______________________________________________________________________
-- http://www.freelists.org/webpage/oracle-lReceived on Mon Apr 13 2009 - 13:51:05 CDT