Performance issue in a package
Hi Everyone,
I have a package that process 40000 rows and it takes 5 hours to complete. I am running the package on oracle version 11.2.0.2.0. I have also enabled a trace and below query that i found to show more time
SQL ID: 3pkjpbwnnd2cp Plan Hash: 403651925
SELECT REGION_ID
FROM
APPS.MSC_REGIONS WHERE (REGION_ID, SR_INSTANCE_ID) IN (SELECT
E.PARENT_REGION_ID, E.SR_INSTANCE_ID FROM APPS.MSC_TRADING_PARTNER_SITES A,
APPS.MSC_TP_SITE_ID_LID B, APPS.MSC_REGION_LOCATIONS C, APPS.MSC_REGIONS D,
APPS.MSC_ZONE_REGIONS E WHERE A.SR_TP_SITE_ID = B.SR_TP_SITE_ID AND
B.LOCATION_ID = C.LOCATION_ID AND B.SR_INSTANCE_ID = C.SR_INSTANCE_ID AND
B.SR_INSTANCE_ID = D.SR_INSTANCE_ID AND B.SR_INSTANCE_ID = E.SR_INSTANCE_ID
AND C.REGION_ID = D.REGION_ID AND C.REGION_ID = E.REGION_ID AND
D.COUNTRY_CODE = A.COUNTRY AND A.PARTNER_TYPE = 2 AND A.TP_SITE_CODE =
'SHIP_TO' AND A.SR_TP_SITE_ID = :B2 AND B.SR_INSTANCE_ID = :B1 ) AND
ZONE_USAGE = 1
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 16479 2.84 2.87 0 2376 0 0
Fetch 16479 19431.68 19666.11 203457 53702544 114 16241
total 32959 19434.52 19668.99 203457 53704920 114 16241
Misses in library cache during parse: 1
Misses in library cache during execute: 10
Optimizer mode: ALL_ROWS
Parsing user id: 173 (APPS) (recursive depth: 1)
Number of plan statistics captured: 1
Rows (1st) Rows (avg) Rows (max) Row Source Operation
1 1 1 VIEW VM_NWVW_2 (cr=6414697 pr=1419 pw=0 time=34240218 us cost=10 size=13 card=1)
1 1 1 HASH UNIQUE (cr=6414697 pr=1419 pw=0 time=34240212 us cost=10 size=197 card=1)
1 1 1 NESTED LOOPS (cr=6414697 pr=1419 pw=0 time=34239493 us)
177 177 177 NESTED LOOPS (cr=6414524 pr=1254 pw=0 time=1091587 us cost=9 size=197 card=1)
89 89 89 NESTED LOOPS (cr=6414370 pr=1222 pw=0 time=1011282 us cost=8 size=182 card=1)
302963 302963 302963 NESTED LOOPS (cr=1723 pr=1201 pw=0 time=2887619 us cost=4 size=162 card=1)
302963 302963 302963 NESTED LOOPS (cr=1684 pr=1197 pw=0 time=409650 us cost=3 size=129 card=1)
270 270 270 NESTED LOOPS (cr=153 pr=151 pw=0 time=83922 us cost=2 size=90 card=1)
57 57 57 PARTITION RANGE SINGLE PARTITION: KEY KEY (cr=150 pr=150 pw=0 time=60513 us cost=1 size=51 card=1)
57 57 57 INDEX SKIP SCAN MSC_REGIONS_N2 PARTITION: KEY KEY (cr=150 pr=150 pw=0 time=60395 us cost=1 size=51 card=1)(object id 459474)
270 270 270 PARTITION RANGE SINGLE PARTITION: KEY KEY (cr=3 pr=1 pw=0 time=23463 us cost=1 size=39 card=1)
270 270 270 INDEX RANGE SCAN MSC_ZONE_REGIONS_N1 PARTITION: KEY KEY (cr=3 pr=1 pw=0 time=23191 us cost=1 size=39 card=1)(object id 459515)
302963 302963 302963 PARTITION RANGE SINGLE PARTITION: KEY KEY (cr=1531 pr=1046 pw=0 time=452207 us cost=1 size=39 card=1)
302963 302963 302963 INDEX RANGE SCAN MSC_REGION_LOCATIONS_N1 PARTITION: KEY KEY (cr=1531 pr=1046 pw=0 time=329852 us cost=1 size=39 card=1)(object id 459478)
302963 302963 302963 PARTITION RANGE SINGLE PARTITION: KEY KEY (cr=39 pr=4 pw=0 time=2277078 us cost=1 size=33 card=1)
302963 302963 302963 TABLE ACCESS BY LOCAL INDEX ROWID MSC_REGIONS PARTITION: KEY KEY (cr=39 pr=4 pw=0 time=1578564 us cost=1 size=33 card=1)
302963 302963 302963 INDEX RANGE SCAN MSC_REGIONS_N2 PARTITION: KEY KEY (cr=8 pr=0 pw=0 time=929795 us cost=1 size=0 card=1)(object id 459474)
89 89 89 TABLE ACCESS BY INDEX ROWID MSC_TRADING_PARTNER_SITES (cr=6412647 pr=21 pw=0 time=27779553 us cost=4 size=20 card=1)
605926 605926 605926 INDEX SKIP SCAN MSC_TRADING_PARTNER_SITES_N1 (cr=5806721 pr=19 pw=0 time=14082031 us cost=4 size=0 card=1)(object id 40148)
177 177 177 INDEX RANGE SCAN MSC_TP_SITE_ID_LID_N2 (cr=154 pr=32 pw=0 time=362449 us cost=1 size=0 card=2)(object id 328997)
1 1 1 TABLE ACCESS BY INDEX ROWID MSC_TP_SITE_ID_LID (cr=173 pr=165 pw=0 time=2066730 us cost=1 size=15 card=1)
Rows Execution Plan
0 SELECT STATEMENT MODE: ALL_ROWS
1 NESTED LOOPS
1 VIEW OF 'VW_NSO_1' (VIEW)
1 HASH (UNIQUE)
177 NESTED LOOPS
89 NESTED LOOPS
302963 NESTED LOOPS
302963 NESTED LOOPS
270 MERGE JOIN (CARTESIAN)
57 TABLE ACCESS MODE: ANALYZED (BY INDEX ROWID)
OF 'MSC_TRADING_PARTNER_SITES' (TABLE)
57 INDEX MODE: ANALYZED (SKIP SCAN) OF
'MSC_TRADING_PARTNER_SITES_N1' (INDEX)
270 BUFFER (SORT)
270 TABLE ACCESS MODE: ANALYZED (BY INDEX ROWID)
OF 'MSC_TP_SITE_ID_LID' (TABLE)
302963 INDEX MODE: ANALYZED (RANGE SCAN) OF
'MSC_TP_SITE_ID_LID_U1' (INDEX (UNIQUE))
302963 PARTITION RANGE (SINGLE) PARTITION:KEYKEY
302963 INDEX MODE: ANALYZED (RANGE SCAN) OF
'MSC_REGION_LOCATIONS_N2' (INDEX) PARTITION:KEYKEY
302963 PARTITION RANGE (SINGLE) PARTITION:KEYKEY
302963 INDEX MODE: ANALYZED (RANGE SCAN) OF
'MSC_ZONE_REGIONS_N2' (INDEX) PARTITION:KEYKEY
89 PARTITION RANGE (SINGLE) PARTITION:KEYKEY
605926 INDEX MODE: ANALYZED (RANGE SCAN) OF
'MSC_REGIONS_N2' (INDEX) PARTITION:KEYKEY
177 TABLE ACCESS MODE: ANALYZED (BY LOCAL INDEX ROWID) OF
'MSC_REGIONS' (TABLE) PARTITION: START=1 STOP=1
1 PARTITION RANGE (ITERATOR) PARTITION:KEYKEY
0 INDEX MODE: ANALYZED (RANGE SCAN) OF 'MSC_REGIONS_N2'
(INDEX) PARTITION:KEYKEY
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
db file sequential read 203457 0.58 103.29
Disk file operations I/O 1 0.00 0.00
asynch descriptor resize 120 0.00 0.00
latch: cache buffers chains 276 0.00 0.02
latch: shared pool 12 0.00 0.00
cr request retry 9055 0.00 0.04
free buffer waits 9055 0.01 99.09
resmgr:internal state change 1 0.10 0.10
latch: object queue header operation 1 0.00 0.00
latch: row cache objects 1 0.00 0.00
When i execute the query separately it executes in "Elapsed: 00:00:00.03". The cost also seems fine.
Can anyone help me on this. Thank you in advance.
Regards,
Raam
Edited by: 936884 on May 26, 2012 1:22 AM
Edited by: 936884 on May 27, 2012 11:39 PM
Edited by: 936884 on May 27, 2012 11:53 PM
Edited by: 936884 on May 27, 2012 11:54 PM
Hi,
welcome to the forum!
1) please use tags to make your plans readable
2) the best starting point for query tuning is execution plan with cardinality feedback enabled, please follow the link provided above in this thread for instructions
3) explain plans are generally useless for SQL tuning. In your case, the plan you posted doesn't even match the actual plan shown in the trace file
4) the most expensive operation in your actual plan is the INDEX SKIP SCAN of SKIP SCAN MSC_TRADING_PARTNER_SITES_N1 (or more accurately, TABLE ACCESS BY ROWID that follows this skip scan). It suggests that cardinalities are way off, but it's probably not cardinalities of MSC_TRADING_PARTNER_SITE, but rather the cardinality of the parent operation (e.g. the cardinality of the outer rowsource in a nested loop, if the skip scan is done inside a nested lop). Since your plan is not formatted and operation ids/parent ids are are not available, I cannot say for sure.
Best regards,
Nikolay
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Photoshop.dll Adobe Photoshop CS6 CS6
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PlugPlug.dll Adobe(R) CSXS PlugPlug Standard Dll (64 bit) 3.0.0.383
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SCCore.dll ScCore 2011/12/14-15:08:46 66.490082 66.490082
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svml_dispmd.dll Intel(r) C Compiler, Intel(r) C++ Compiler, Intel(r) Fortran Compiler 12.0
tbb.dll Intel(R) Threading Building Blocks for Windows 3, 0, 2010, 0406
tbbmalloc.dll Intel(R) Threading Building Blocks for Windows 3, 0, 2010, 0406
updaternotifications.dll Adobe Updater Notifications Library 6.0.0.24 (BuildVersion: 1.0; BuildDate: BUILDDATETIME) 6.0.0.24
WRServices.dll WRServices Friday January 27 2012 13:22:12 Build 0.17112 0.17112
Required plug-ins:
3D Studio 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Accented Edges 13.0
Adaptive Wide Angle 13.0
Angled Strokes 13.0
Average 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Bas Relief 13.0
BMP 13.0
Camera Raw 8.1
Camera Raw Filter 8.1
Chalk & Charcoal 13.0
Charcoal 13.0
Chrome 13.0
Cineon 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Clouds 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Collada 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Color Halftone 13.0
Colored Pencil 13.0
CompuServe GIF 13.0
Conté Crayon 13.0
Craquelure 13.0
Crop and Straighten Photos 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Crop and Straighten Photos Filter 13.0
Crosshatch 13.0
Crystallize 13.0
Cutout 13.0
Dark Strokes 13.0
De-Interlace 13.0
Dicom 13.0
Difference Clouds 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Diffuse Glow 13.0
Displace 13.0
Dry Brush 13.0
Eazel Acquire 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Embed Watermark 4.0
Entropy 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Extrude 13.0
FastCore Routines 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Fibers 13.0
Film Grain 13.0
Filter Gallery 13.0
Flash 3D 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Fresco 13.0
Glass 13.0
Glowing Edges 13.0
Google Earth 4 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Grain 13.0
Graphic Pen 13.0
Halftone Pattern 13.0
HDRMergeUI 13.0
IFF Format 13.0
Ink Outlines 13.0
JPEG 2000 13.0
Kurtosis 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Lens Blur 13.0
Lens Correction 13.0
Lens Flare 13.0
Liquify 13.0
Matlab Operation 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Maximum 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Mean 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Measurement Core 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Median 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Mezzotint 13.0
Minimum 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
MMXCore Routines 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Mosaic Tiles 13.0
Multiprocessor Support 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Neon Glow 13.0
Note Paper 13.0
NTSC Colors 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Ocean Ripple 13.0
Oil Paint 13.0
OpenEXR 13.0
Paint Daubs 13.0
Palette Knife 13.0
Patchwork 13.0
Paths to Illustrator 13.0
PCX 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Photocopy 13.0
Photoshop 3D Engine 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Picture Package Filter 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Pinch 13.0
Pixar 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Plaster 13.0
Plastic Wrap 13.0
PNG 13.0
Pointillize 13.0
Polar Coordinates 13.0
Portable Bit Map 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Poster Edges 13.0
Radial Blur 13.0
Radiance 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Range 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Read Watermark 4.0
Reticulation 13.0
Ripple 13.0
Rough Pastels 13.0
Save for Web 13.0
ScriptingSupport 13.1.2
Shear 13.0
Skewness 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Smart Blur 13.0
Smudge Stick 13.0
Solarize 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Spatter 13.0
Spherize 13.0
Sponge 13.0
Sprayed Strokes 13.0
Stained Glass 13.0
Stamp 13.0
Standard Deviation 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
STL 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Sumi-e 13.0
Summation 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Targa 13.0
Texturizer 13.0
Tiles 13.0
Torn Edges 13.0
Twirl 13.0
Underpainting 13.0
Vanishing Point 13.0
Variance 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Variations 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Water Paper 13.0
Watercolor 13.0
Wave 13.0
Wavefront|OBJ 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
WIA Support 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Wind 13.0
Wireless Bitmap 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
ZigZag 13.0
Optional and third party plug-ins: NONE
Plug-ins that failed to load: NONE
Flash:
Mini Bridge
Kuler
Installed TWAIN devices: NONE -
Performance issue in Portal Reports
Hi
We are experiencing a serious performance issue, in a report, and need a urgent fix on this issue.
The report is a Reports From SQL Query report, I need to find a way to dynamically make/create the where clause otherwise I have to make the statement in a way the exclude the use of indexes.
Full-table-scan is not a valid option here; the number or records is simply too high (several millions its a datawarehouse solution). In the Developer packaged, we can make the where clause dynamically, this basic yet extremely important feature, is essential to all database application.
We need to know how to do it, and if this functionality is not natively supported, then this should be one of the priority one functionalities to implement in future releases.
However, what do I do for now?
Thank in advanceI have found a temporary workaround, by editing the where clause in the stored procedure manually. However this fix have to be done every time a change have been committed in the wizard, so it is still not a solution to go for indefinitely, but its ok for now.
-
Performance Issue Executing a BEx Query in Crystal Report E 4.0
Dear Forum
I'm working for a customer with big performance issue Executing a BEx Query in Crystal via transient universe.
When query is executed directly against BW via RSRT query returns results in under 2 seconds.
When executed in crystal, without the use of subreports multiple executions (calls to BICS_GET_RESULTS) are seen. Runtimes are as long as 60 seconds.
The Bex query is based on a multiprovider without ODS.
The RFC trace shows BICS connection problems, CS as BICS_PROV_GET_INITIAL_STATE takes a lot of time.
I checked the note 1399816 - Task name - prefix - RSDRP_EXECUTE_AT_QUERY_DISP, and itu2019s not applicable because the customer has the BI 7.01 SP 8 and it has already
domain RSDR0_TASKNAME_LONG in package RSDRC with the
description: 'BW Data Manager: Task name - 32 characters', data
type: CHAR; No. Characters: 32, decimal digits: 0
data element RSDR0_TASKNAME_LONG in package RSDRC with the
description 'BW Data Manager: Task name - 32 characters' and the
previously created domain.
as described on the message
Could you suggest me something to check, please?
Thanks en advance
Regards
RosaHi,
It would be great if you would quote the ADAPT and tell the audience when it is targetted for a fix.
Generally speaking, CR for Enteprise isn't as performant as WebI, because uptake was rather slow .. so i'm of the opinion that there is improvements to be gained. So please work with Support via OSS.
My onlt recommendations can be :
- Patch up to P2.12 in bi 4.0
- Define more default values on the Bex query variables.
- Implement this note in the BW 1593802 Performance optimization when loading query views
Regards,
H -
Performance issue after Upgrade from 4.7 to ECC 6.0 with a select query
Hi All,
There is a Performance issue after Upgrade from 4.7 to ECC 6.0 with a select query in a report painter.
This query is working fine when executed in 4.7 system where as it is running for more time in ECC6.0.
Select query is on the table COSP.
SELECT (FIELD_LIST)
INTO CORRESPONDING FIELDS OF TABLE I_COSP PACKAGE SIZE 1000
FROM COSP CLIENT SPECIFIED
WHERE GJAHR IN SELR_GJAHR
AND KSTAR IN SELR_KSTAR
AND LEDNR EQ '00'
AND OBJNR IN SELR_OBJNR
AND PERBL IN SELR_PERBL
AND VERSN IN SELR_VERSN
AND WRTTP IN SELR_WRTTP
AND MANDT IN MANDTTAB
GROUP BY (GROUP_LIST).
LOOP AT I_COSP .
COSP = I_COSP .
PERFORM PCOSP USING I_COSP-_COUNTER.
CLEAR: $RWTAB, COSP .
CLEAR CCR1S .
ENDLOOP.
ENDSELECT.
I have checked with the table indexes, they were same as in 4.7 system.
What can be the reson for the difference in execution time. How can this be reduced without adjusting the select query.
Thanks in advance for the responses.
Regards,
Dedeepya.Hi,
ohhhhh....... lots of problems in select query......this is not the way you should write it.
Some generic comments:
1. never use SELECT
endselect.
SELECT
into table
for all entries in table
where.
use perform statment after this selection.
2. Do not use into corresponding fields. use exact structure type.
3. use proper sequence of fields in the where condition so that it helps table go according to indexes.
e.g in your case
sequence should be
LEDNR
OBJNR
GJAHR
WRTTP
VERSN
KSTAR
HRKFT
VRGNG
VBUND
PARGB
BEKNZ
TWAER
PERBL
sequence should be same as defined in table.
Always keep select query as simple as possible and perform all other calculations etc. afterwords.
I hope it helps.
Regards,
Pranaya -
How to restrict logging on portal (Performance issue)
Hi guys,
does anyone know how to restrict logging of the portal? Even though I made a change on Visual Administrator -> Services -> Log Configurator setting ALL categories to severity = 'Error', I keep getting 'Info' severity traces logged in defaultTrace.trc (viewed by Logg Viewer). Which in practise means tons of logged trace information! I think this might be one of the reasons we have been experiencing performance issues lately.
Does anyone know how to restrict this logging?
Any help greatly appreciated!
Cheers,
FrankHi,
I would not only set the severity of categories to 'Error' but also locations to 'Error'.
A log controller - can be a "category" or a "location". Categories are used for "logging" and represent problem areas such as network, database, security, user interface, etc. Identified by a slash-separated ('/') path of names, prefixed with an additional slash. Locations are used for "tracing" and correspond to places in the development components. Identified by a dot-separated ('.') path of names, which is often the name of the respective java package.
Greetings,
Praveen Gudapati -
Photoshop CS4 performance issue
HI
we use App-V for almost all of our applications and we work with a local cache mode
as far as I know - the performance of a local application and the virtual application should be the same even if the package is big. a great example is Office 2010 App-V package which works the same as a local installation
We saw that there are some applications that run very slow comparing to a local installation on the same hardware
specifically - Adobe PhotoShop CS4 is a good example. when we load a 10MB picture and try to make a simple task like mark a selection - it takes forever for the application to response!
the weirdest think is that we tried to sequence the application both in App-V 4.6 SP3 and App-V 5.0 SP2 we got the same results. we tried the default things as reset the client's cache or allowing local interaction, com objects... etc.
I really have no idea what else we can do. as I wrote, larger applications work in our environment just fine, but there are some that stuck us. another application that works slower is NIS. I'm not sure if the performance issue is always from
the same reason but I'm trying to figure out what can we do to improve it
would love to get some ideas
Tamir LevyHello,
Since Microsoft made this claim (as stated by you), my recommendation to improve your situation still stands;
Open a ticket with Microsoft to understand the topic. My assumption would be that you could name the engineer who visited you a few years ago, and revisit the discussion you had with him and Microsoft directly.
(the statement of course goes against any independt benchmarking - such as
Project VRC,
acknowledged facts by the Community and more..)
As stated already; If you have tested all that you described, I can't offer anymore suggestions apart from the above.
Nicke Källén | The Knack| Twitter:
@Znackattack -
RedHat AS4 and Oracle 10R2 upgrade - performance issue
Hi all,
As part of our database upgrade project (from Oracle 10.2.0.1 to 10.2.0.3), we decided to upgrade our OS as well (RedHat AS4 from Update 2 to Update 4, 64-bit). We are in testing phase now and having some serious performance issues.
These below are steps that we have performed:
1. Ran db load testing plus Application Regression testing in order to get a baseline
2. Upgraded RH AS4 from Update 2 to Update 4
3. Ran db load testing plus Application Regression testing
4. Database load testing (including massive parallel processes, like 'insert into ...', 'create indexes ...parallel',etc ...) showed significant slowdown compared to our 'baseline' test (Update 2): 70-80%. The database is still Oracle 10.2.0.1, only RH was updated at this point
5. We upgraded Oracle 10.2.0.1 to 10.2.0.3, latest CPU , etc ...(Update 4 on OS side) still same slowdown in performances ...
6. Our Application Regression Testing has showed performance degradation also but not in same extent as db load test (10-20 % on different application modules)
7. We also did one more thing : went back and upgraded Oracle with Update 2 (some 'workarounds' were required but that's another story). Performances were OK. So it seems our problem is not (directly) related to Oracle version.
Now we are going to install Update 6 (the latest update for AS4) and see how it goes.
If anybody have any experience or idea about this case and want to share it with us, it would be highly appreciated.
Thanks in advance,
Milan N.Just a quick update for those who follow this thread ...
Everything worked fine with 'Update 6' kernel (both Oracle 10.2.0.1 and 10.2.0.3). We have also applied all available security packages.
Milan N. -
SQLs erver migration performance issue
We are performing migration from oracle to MSSQL server 2005 (Windows 2003/SAP 4.6D).Our target system configuration is like below:
->OS - Windows 2003 x64
->DB - MSSQL server 2005 SP4
->SAP - 4.6 D kernel
->CPU - 4 processors (2.67ghz each)
->RAM - 16 GB
->source system DB size - around 1 TB and package splitting was implemented.
While importing the export dump that came from source system, we are facing load performance issue's.
1) We have started 10 parallel processes and after import is started, CPU is getting 95% to 99% utilized and when we check SQL server studio-> Activity monitor we found below information:
-There were around 20 processes are in status sleeping
-Only one or two system processes are running with commands - INSERT,SELECT INTO commands ( column)
-At any point of time only two processes are running and CPU utilization is hitting high.
-Import is very slow and its taking 35 hours to complete
We have followed few SAP notes(1054852,1241751 e.tc..) and below are the settings for SQL server:
-Minimum server memory - 5 GB
- Maximum server memory - 5 GB
- index creation memory - 0
- Maximum memory per query - 1024 kb
- Maximum degree of parellelism - 1
- Parallellism locks - 0
- Cost threshold of parellism - 5
- Enabled trace flags - 610,620,1117,1211,3917
- Windows environment variable BCP_BATCH_SIZE = 10000
- SQL log file size - 100 GB
- tempdb size - 20 GB
2) When we tried another test import after tuning parameters (Maximum degree of parellelism to 3) and increasing r3load parallel processes to 20, we found of inserts
are overflowing in process list and blocking other waiting processes and putting them in suspended mode.CPU utilization is at 80%
Are there any SQL server parameters need to be tuned to fix this import load time issue in both scenarios? Are there any best practises for migrating to SQL server?
Thanks..> 1) We have started 10 parallel processes and after import is started, CPU is getting 95% to 99% utilized and when we check SQL server studio-> Activity monitor we found below information:
What processes is using the CPU? The SQL Server itself or others? (see task manager)
> -Minimum server memory - 5 GB
> - Maximum server memory - 5 GB
For the time of the migration itself I'd give the database more memory (10 GB or more) and reconfigure later when the import is done.
What parameters do you use for the R3load? I'd recommend
-loadprocedure fast -merge_bck -c 10000
and also set
BCP_LOB=1 in the environment.
Markus -
Process flow/map performance issues
We have some issues with our OWB-based application and we're looking to find out if there are different ways we could be using the tool, or features/options we've missed.
We are trying to maintain a near real time feed of data from a front end system into our warehouse which was built using OWB 10.2.0.3 over a 10.2.0.4 database. The bulk of the application consists of OWB maps with a few hand-written PL/SQL objects, all executed in a series of hierachical OWB process flows. Maps/transformations are executed either sequentially or in parallel where the referential integrity of the model allows.
The problem is that we have around 150 tables in the datamart which could potentially require updating on each refresh cycle, although in practice only a few tables have any activity on a typical refresh cycle. The cycle consists of loading data into a set of staging tables, and from there the data is transformed into the main schema, often with multiple maps per target table.
On every cycle we run hundreds of maps, the vast majority of which process zero rows. Each map runs quickly and efficiently in its own right but collectively they add up to a 5 - 10 min cycle even if there is no data to process.
There are 2 avenues which we'd like to explore and would be grateful if anyone could provide any pointers/suggestions :-
1) It appears that each map opens and closes its own database session when it executes. I presume this was done because a single process flow could be constructed with maps executing in different target schemas, but we know that's not the case for us. We'd like to know if there is anyway to configure the database connection at a higher level (eg. process flow) so it opens a connection once and executes each of the maps (database packages) in that one session.
Our DBAs are experimenting with 'shared server' settings at a database level which may help to some degree but won't be the whole story.
2) Another option is simply to run less maps eg. load the staging area as now, collate stats on which staging tables contain new data, and then apply some logic such that subsequent maps only execute if the relevant staging table(s) contain(s) some new data, otherwise bypass that map.
We tried experimenting with the 'Pre Mapping Process' operator, but essentially that just generates another function call from the map package, so we still have the overhead of opening a database session for each map to run the package. Minimal gain.
We thought about adding a function call in the process flow before each map and then branching to either execute/bypass the map as approriate, but the function call still requires opening/closing of a database session each time so, once again, minimal gain.
What we really want is some way for a map or process flow to check without logging onto the database repeatedly.
Any ideas on the above, or other potential solutions anyone could suggest, would be greatly appreciated.Hi,
Please see if these documents help.
Note: 554635.1 - Create Accounting Process Performs Poorly When 100K + Distributions are Passed for an Event
Note: 954273.1 - Multiple Create Accounting Requests Result In Poor Performance For Online Accruals
Note: 763500.1 - R12: Performance Issue with Create Accounting
Note: 733637.1 - R12:Performance Issue When Running Accounting Program Xlaaccup
Note: 781311.1 - Create Accounting Process Taking A Long Time To Complete After Appying Critical Patches
Note: 557869.1 - EBS: R12 Oracle Financials Critical Patches
Regards,
Hussein
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