Poor Performance With Free Tablespace Checking Query Generated By DB Artisan?

Jun 12, 2012

Our production DB version is 11.2.0.1 and we do use DBArtisian. Everyday morning we check table space usage using that tool and it generates the below listed query. It used to run in 15 secs. But since one week it is running for 5/6/8 mins. I have updated the statistics on sys objects and tuning advisor created the execution plan. So, now it is running in 2 mins. Nothing has been changed in the DB configuration. I see the same query running in secs in dev environment. understand what might be the issue and how could I improve the performance of this query.

SELECT SUB.TABLESPACE_NAME, SUB.STATUS, SUB.EXTENT_MANAGEMENT, SUB.SEGMENT_SPACE_MANAGEMENT, SUB.TOTAL_SPACE_MB, SUB.USED_SPACE_MB, SUB.FREE_SPACE_MB, SUB.PERCENT_FREE_SPACE, SUB.CONTENTS, SUB.TABLESPACE_GROUP, CASE WHEN SUB.TABLESPACE_NAME = P.VALUE AND SUB.CONTENTS = 'UNDO' THEN 'YES' ELSE 'NO' END

[code]...

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Jul 9, 2012

I've installed GI 11.2.0.3 on AIX 7.1.And today I noticed strange ASM's behavior:

-bash-3.2$ getconf DISK_SIZE /dev/rhdisk2
*2285768*
-bash-3.2$ asmcmd
ASMCMD> lsdsk -k
Total_MB Free_MB OS_MB Name Failgroup Failgroup_Type Library Label UDID Product Redund Path
*188616* 68204 *188616* DATA_0000 DATA_0000 REGULAR System UNKNOWN /dev/rhdisk2

I guessed that was because of LUN size (it was exceed 2 TB)After that I dinamically shrinked LUN size on our external storage, rebooted and perfomed cfgmgr command on both nodes. But I still have no enough free space.

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*1992294*
-bash-3.2$ asmcmd
ASMCMD> lsdsk -k
Total_MB Free_MB OS_MB Name Failgroup Failgroup_Type Library Label UDID Product Redund Path
*188616* 68204 *1992294* DATA_0000 DATA_0000 REGULAR System UNKNOWN /dev/rhdisk2

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Apr 7, 2011

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UPDATE invoice_header inv
SET inv.modified_due_date =
(SELECT inv1.btn_due_date
FROM invoice_header inv1
WHERE inv.dct_code = inv1.dct_code AND inv1.release = 'A5')

[code]...

During 'sequential read' using p1,p2 values tried to get what the session is reading and found that it is using the table itself.

During lath free I found following
SELECT name, 'Child '||child#, gets, misses, sleeps
FROM v$latch_children
WHERE addr= (select p1raw from v$session_wait where sid=18)
UNION

[code]...

However instead of self join when I creaed global temporary table as

create global temporary table t as select * from invoice_header where release='A5'

And used it in the update as

UPDATE invoice_header inv
SET inv.modified_due_date =
(SELECT t.btn_due_date
FROM t
WHERE inv.dct_code = t.dct_code AND t.release = 'A5')
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It updated the records in a second!!

Questions are
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SELECT TABLESPACE_NAME,
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------------------------------ ---------- -----------
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create or replace
PROCEDURE PROCEDURE1
AS
BEGIN
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WITH data as (
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I tried below query but it is not working.

WITH data as (
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find below the sample

TYPE ref_csr IS REF CURSOR;
insert_csr ref_csr;
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[Code].....

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Environment Setup

Oracle Server 11g on HP-UX
Oracle Client on Windows

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From the sar report it seems that,

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I am attaching the excel sheet for sar results. Let me know if you need more information

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[code]...

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