RE: external table access hangs

From: Herring Dave - dherri <Dave.Herring_at_acxiom.com>
Date: Tue, 27 Feb 2007 06:19:18 -0600
Message-ID: <7ED53A68952D3B4C9540B4EFA5C76E3602E51788@CWYMSX04.Corp.Acxiom.net>

Mladen,

V$SESSION_WAIT shows the following:

SID SEQ# EVENT

------------------ ------------------
----------------------------------------------------------------

P1TEXT
P1 P1RAW

---------------- P2TEXT P2 P2RAW
---------------- P3TEXT P3 P3RAW WAIT_TIME
---------------- ------------------ SECONDS_IN_WAIT STATE
------------------- 212 123 db file sequential read file# 1 0000000000000001 block# 2300 00000000000008FC blocks 1 0000000000000001 1 197 WAITED KNOWN TIME

file#1 is /u02/oradata/ntrndb1/system01.dbf, which matches the output I gave from event 10046 where it appears to be waiting on the query:

SELECT PATH, READ, WRITE FROM LOADER_DIR_OBJS WHERE NAME = 'COLLECT_DATA_DIR'; I can run this query interactively and it returns immediately.

As for "hang" being in question, from a front-end the process does hang, as in performs no noticable work. From the O/S level, I see the associated Oracle process consume considerable amounts of CPU, grabbing 95%+ on the CPU its assigned to.

And no, I have not opened an SR with Oracle yet. I was hoping that perhaps someone on this list might have run into something similar and provide would be willing to share.

Dave

David C. Herring, DBA | A c x i o m Delivery Center Organization

630-944-4762 office | 630-430-5988 wireless | 630-944-4989 fax

> -----Original Message-----

> From: Mladen Gogala [mailto:mgogala_at_verizon.net]
> Sent: Monday, February 26, 2007 10:02 PM
> To: Herring Dave - dherri
> Cc: rjamya; oracle-l_at_freelists.org
> Subject: Re: external table access hangs
> 
> On 02/26/2007 12:20:07 PM, Herring Dave - dherri wrote:
> > Nothing in bad or discard file.  This is all that's in the logfile:
> 
> Ok. What does "hang" really mean? What does V$SESSION_WAIT say?
> Did you locate the accessing process? Did you try with strace/truss?
> Did you try dumping process and system states and ask Oracle Corp. to
> investigate, the process known as "opening a TAR"? When you say that
> process hangs, does it look like this?
> 
> --
> Mladen Gogala
> http://www.mladen-gogala.com
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Received on Tue Feb 27 2007 - 06:19:18 CST