List:
My apologies. Seems like I'm taking up more than my
share of bandwith. I'm doing major battle with a
vendor. Their app runs this "thing" that takes 10
seconds. Unfortunately it runs this thing several
thousand times a day. This is a critical issue for
us.
I trapped what's running in that 10 seconds. The code
looks just swell. Seems pretty obvious to me that the
problem is with the large number of parses occurring.
I see 1 spot where they parse 5 times and return 0
rows; another where they parse, execute, and fetch 5
times for no obvious reason.
We do not have access to the vendor code. The vendor
says set cursor_sharing to "force". I say that's
solving the wrong problem.
First naive question: Without their code, is there
any way for me to know what could cause this large
number of parses?
2nd question: I see an exact match between the number
of parses and the times waited on "sql*net message to
client". Is this coincidence, or can I make some
correlation here?
Thanks so much for your patience and your help.
Database is 8.1.7.4 on Solaris 8.
Barb
SELECT PAPER, PAGE, PAGENAME, PAGENO, COLUMNS,
COLWIDTH, COLSPACE, HEIGHT
FROM PAGE
call count cpu elapsed disk
query current rows
------- ------ -------- ---------- ----------
---------- ---------- ----------
Parse 2 0.02 0.02 0
0 0 0
Execute 1 0.00 0.00 0
0 0 0
Fetch 1 0.01 0.01 0
13 12 72
------- ------ -------- ---------- ----------
---------- ---------- ----------
total 4 0.03 0.03 0
13 12 72
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 586 (SYSADMIN)
Rows Execution Plan
-------
---------------------------------------------------
0 SELECT STATEMENT GOAL: CHOOSE
0 TABLE ACCESS GOAL: ANALYZED (FULL) OF
'PAGE'
Elapsed times include waiting on following events:
Event waited on Times
Max. Wait Total Waited
---------------------------------------- Waited
---------- ------------
SQL*Net message to client 2
0.00 0.00
SQL*Net message from client 2
0.00 0.00
SQL*Net more data to client 1
0.00 0.00
********************************************************************************
SELECT PAPER, PAGE, PAGENAME, PAGENO, COLUMNS,
COLWIDTH, COLSPACE, HEIGHT
FROM
PAGE WHERE PAPER = :1 AND PAGE = :2
call count cpu elapsed disk
query current rows
------- ------ -------- ---------- ----------
---------- ---------- ----------
Parse 2 0.00 0.01 0
0 0 0
Execute 1 0.00 0.00 0
0 0 0
Fetch 1 0.00 0.00 0
2 0 1
------- ------ -------- ---------- ----------
---------- ---------- ----------
total 4 0.00 0.01 0
2 0 1
Misses in library cache during parse: 1
Parsing user id: 586 (SYSADMIN)
Rows Execution Plan
-------
---------------------------------------------------
0 SELECT STATEMENT GOAL: CHOOSE
0 TABLE ACCESS GOAL: ANALYZED (BY INDEX
ROWID) OF 'PAGE'
0 INDEX GOAL: ANALYZED (UNIQUE SCAN) OF
'I_PAG1' (UNIQUE)
Elapsed times include waiting on following events:
Event waited on Times
Max. Wait Total Waited
---------------------------------------- Waited
---------- ------------
SQL*Net message to client 2
0.00 0.00
SQL*Net message from client 2
0.09 0.09
********************************************************************************
SELECT HID, PARENT, CHILD, NODE_TYPE, NODE_ITEM, TAG,
ATTRIBUTE_ITEM
FROM
XMLS_HIERARCHY WHERE HID = :1
call count cpu elapsed disk
query current rows
------- ------ -------- ---------- ----------
---------- ---------- ----------
Parse 5 0.00 0.00 0
0 0 0
Execute 0 0.00 0.00 0
0 0 0
Fetch 0 0.00 0.00 0
0 0 0
------- ------ -------- ---------- ----------
---------- ---------- ----------
total 5 0.00 0.00 0
0 0 0
Misses in library cache during parse: 1
Parsing user id: 586 (SYSADMIN)
Rows Execution Plan
-------
---------------------------------------------------
0 SELECT STATEMENT GOAL: CHOOSE
0 TABLE ACCESS GOAL: ANALYZED (BY INDEX
ROWID) OF
'XMLS_HIERARCHY'
0 INDEX GOAL: ANALYZED (UNIQUE SCAN) OF
'PK_XMLS_HIERARCHY'
(UNIQUE)
Elapsed times include waiting on following events:
Event waited on Times
Max. Wait Total Waited
---------------------------------------- Waited
---------- ------------
SQL*Net message to client 5
0.00 0.00
SQL*Net message from client 5
0.01 0.01
********************************************************************************
SELECT HID , PARENT , CHILD , NODE_TYPE , NODE_ITEM ,
TAG , ATTRIBUTE_ITEM ,
XMLS_HIERARCHY."ROWID"
FROM
XMLS_HIERARCHY WHERE HID = :1
call count cpu elapsed disk
query current rows
------- ------ -------- ---------- ----------
---------- ---------- ----------
Parse 5 0.00 0.00 0
0 0 0
Execute 5 0.01 0.00 0
0 0 0
Fetch 5 0.00 0.00 0
10 0 5
------- ------ -------- ---------- ----------
---------- ---------- ----------
total 15 0.01 0.00 0
10 0 5
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 586 (SYSADMIN)
Rows Row Source Operation
-------
---------------------------------------------------
1 TABLE ACCESS BY INDEX ROWID XMLS_HIERARCHY
2 INDEX UNIQUE SCAN (object id 394972)
Rows Execution Plan
-------
---------------------------------------------------
0 SELECT STATEMENT GOAL: CHOOSE
1 TABLE ACCESS GOAL: ANALYZED (BY INDEX
ROWID) OF
'XMLS_HIERARCHY'
2 INDEX GOAL: ANALYZED (UNIQUE SCAN) OF
'PK_XMLS_HIERARCHY'
(UNIQUE)
Elapsed times include waiting on following events:
Event waited on Times
Max. Wait Total Waited
---------------------------------------- Waited
---------- ------------
SQL*Net message to client 5
0.00 0.00
SQL*Net message from client 4
1.39 4.63
********************************************************************************
OVERALL TOTALS FOR ALL NON-RECURSIVE STATEMENTS
call count cpu elapsed disk
query current rows
------- ------ -------- ---------- ----------
---------- ---------- ----------
Parse 14 0.02 0.03 0
0 0 0
Execute 7 0.01 0.00 0
0 0 0
Fetch 7 0.01 0.01 0
25 12 78
------- ------ -------- ---------- ----------
---------- ---------- ----------
total 28 0.04 0.04 0
25 12 78
Misses in library cache during parse: 4
Elapsed times include waiting on following events:
Event waited on Times
Max. Wait Total Waited
---------------------------------------- Waited
---------- ------------
SQL*Net message to client 14
0.00 0.00
SQL*Net message from client 13
1.39 4.73
SQL*Net more data to client 1
0.00 0.00
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