RE: INSERT...SELECT pegs CPU, but is waiting on scattered read?

  • From: "Cary Millsap" <cary.millsap@xxxxxxxxxx>
  • To: <oracle-l@xxxxxxxxxxxxx>
  • Date: Thu, 29 Apr 2004 14:08:59 -0500

If you can still connect to Oracle, you'll probably see a tremendous
amount of activity reflected in V$SESS_IO.BLOCK_GETS and
~.CONSISTENT_GETS. Cut the SELECT statement into a SQL*Plus session and
go to work on "tuning the SQL." This (a SQL tuning issue) is almost
undoubtedly the cause of your problem.


Cary Millsap
Hotsos Enterprises, Ltd.
http://www.hotsos.com
* Nullius in verba *

Upcoming events:
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- Visit www.hotsos.com for schedule details...


-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Jesse, Rich
Sent: Thursday, April 29, 2004 1:59 PM
To: 'oracle-l@xxxxxxxxxxxxx'
Subject: RE: INSERT...SELECT pegs CPU, but is waiting on scattered read?

To make matters worse, the process is completely hung now, being 100%
CPU
bound with zero I/O:

=====================
PARSING IN CURSOR #33 len=761 dep=1 uid=105 oct=2 lid=105 tim=952209474
hv=1784939705 ad='e6f44c20'
INSERT INTO part_usage_tmp
SELECT
ph.partno
, DECODE(ph.warehouse,:"SYS_B_00",:"SYS_B_01",NULL,:"SYS_B_02",
ph.warehouse) warehouse
, ph.transqty
FROM
QT_PART_HISTORY_24_MONTHS ph
, glxref gl
WHERE
ph.ACCOUNTNO = gl.ACCOUNTNO
AND gl.ENTITY_CODE = :"SYS_B_03"
AND ph.fiscal_year BETWEEN :"SYS_B_04" AND 
TO_NUMBER(TO_CHAR(TRUNC(SYSDATE), :"SYS_B_05"))
AND TO_DATE(SUBSTR(TIME_STAMP,:"SYS_B_06",:"SYS_B_07"),:"SYS_B_08")
BETWEEN 
:"SYS_B_09" AND LAST_DAY(ADD_MONTHS(TRUNC(SYSDATE),-:"SYS_B_10"))
AND ph.transtype IN (:"SYS_B_11",:"SYS_B_12",:"SYS_B_13")
AND gl.PRICELISTNO LIKE :"SYS_B_14"
END OF STMT
PARSE #33:c=0,e=0,p=0,cr=0,cu=0,mis=1,r=0,dep=1,og=0,tim=952209474

It's been sitting here now for 15 minutes (more?) in a tight CPU loop.

Joy.

Rich
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