Performance impact of Multi Data Provider in WAD !!

Hello Experts,
I am working on WAD reports with multiple Data Providers,
I.e. Web Template with DP1, DP2, DP3, DP4 --- Query 1
DP5, DP6, DP7, DP8 --- Query 2
Purpose - i have used Tab Strip Item with eight Tabs, each tab belongs to respective DP.
- Each Tab represent differnt view of the Report (using commands)
So, Does multi Data Provider with Multiple Queries have impact on Performance of the web report ? and If it does, then possible ways to improve performance ? Any advice/experience on this..
Many many thanks in advance.. Please help... Thanks
Regards,
Sunil Patel

Hi,
you could work with the settings for your queries in RSRT.
Ther you can define what data will be read when running a query and what is read when users are doing navigation in the query.
By changing the settings you might get some better performance.
Though working with aggregates has probably more effect on the performance.
regards
Cornelia

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Filter Data Provider in WAD

Hi all,
I was wondering if it is possible to filter a data provider in the WAD. I want to be able to filter out a hierarchy node u201C1000MMARKCOMM 0HIER_NODEu201D for InfoObject Cost Center u2013 so that when I run the WAD the 1000MMARKCOMM 0HIER_NODE is not shown.
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Hi Gattu,
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Hi,
I'd like to be able to monitor some of the new Oracle performance counters added in ODP Version 11. What do I need to do to make these performance counters visible in Windows Server 2003's Performance Monitor?
Do I:
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Hi,
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Hi Team,
          We have few queries which were running good until last week; but for the past 3 days these queries were facing severe some performance issues and timeout dumps in the back-end.
For some selections it is running long and for some selection it is executing quicker and for some selection it is getting time out.
We made a complete data rebuild for the queries connected data targets (data rebuild from the source) before 3 days; after which the query performance issue faced.
No changes were made to the queries or objects for the last 2 months.
Data Flow - Query -> Multi Provider -> Infoset -> InfoCube -> DSO -> Datasource (DB Connect).
Note:
In Query we have nested aggregation to handle the result rows; but again no changes to it for the past 2 months.
We have loaded data in one single request at the InfoCube level.
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Can anyone please throw light on the possible cause for the performance issue?
Thanks
Regards
San

Hi San,
As you said that you completely loaded data and then only your performance issues started, can you please tell whether you are using any BIA for reporting?.
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Regards,
Rajesh

Performance impact using nested tables and object

Hi,
Iam using oracle 11g.
While creating a package, iam using lot of nested tables created based on objects which will be passed between multiple functions in the package..
Will it have any performance impact since all the data is stored in the memory.
How can i measure the performance impact when the data grows ?
Regards,
Oracle User
Edited by: user9080289 on Jun 30, 2011 6:07 AM
Edited by: user9080289 on Jun 30, 2011 6:42 AM

user9080289 wrote:
While creating a package, iam using lot of nested tables created based on objects which will be passed between multiple functions in the package.. Not the best of ideas in general, in PL/SQL. This is not client code that can lay sole claim to most of the memory. It is server code and one of many server processes that need to share the available resources. So capitalism is fine on a client, but you need socialism on the server? {noformat} ;-) {noformat}
Will it have any performance impact since all the data is stored in the memory.Interestingly yes. Usually crunching data in memory is better. In this case it may not be so. The memory used is the most expensive memory Oracle can use - the PGA. Private process memory. This means each process copy running that code, will need lots of memory.
If you're not passing the data structures by reference, it means even bigger demands on memory as the data structure needs to be copied into the call stack and duplicated.
The worse case scenario is that such code consumes so much free server memory, and make such huge demands on having that in pysical memory, it trashes memory management as the swap daemons are unable to keep up with the demand of swapping virtual memory pages into and out of memory. Most CPU time is spend by the swap daemons.
I have seen servers crash due to this. I have seen a single PL/SQL process causing this.
How can i measure the performance impact when the data grows ?Well, you need to look at the impact of your code on PGA memory. It is not SQL performance or I/O performance that is a factor - just how much private process memory your code needs in order to execute.

More than one Data provider

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Raveendra,
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URL: http://www.ds.uillinois.edu/docs/Complex_Queries_in_BusinessObjects.pdf
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Tachometer in WAD 3.5x - to show Avg of all values in the Data provider

Hi All,
I am creating a tachometer in WAD 3.5x.
Actually the requirement for the tachometer i want to design is that it should display the Average value of the data column that is displayed in the dataprovider(which is a view in this case).
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I am trying to suppress all the single value rows and display only the result row in my view, am unable to do so.
Any help would be much appreciated
Thanks
Shikha Verma

Hi Shikha Varma
Just quick thought just try with the swap axis and do the table cross verification..
[Chart Types and its functions_Spedo meter|http://help.sap.com/saphelp_nw04/helpdata/en/c9/08533b97037963e10000000a114084/frameset.htm]
As per the help in my RnD it is working but it is 7.X Wad just try it in 3.5 hope fully it will works for you..if not please excuse..
Hope its clear a little..!
Thanks
K M R
>
shikha.v3 wrote:
> Hi All,
> I am creating a tachometer in WAD 3.5x.
> Actually the requirement for the tachometer i want to design is that it should display the Average value of the data column that is displayed in the dataprovider(which is a view in this case).
> My view (Data Provider for tachometer) contains only one data column, and its Result row contains the Average value for the data column. But when I run WAD, the tachometer doesnot read the result row, instead it reads each of the individual rows and creates a pointer for each record. Whereas as per my requirement, the tachometer should display only a single pointer depicting the average value of all records.
>
> I am trying to suppress all the single value rows and display only the result row in my view, am unable to do so.
>
> Any help would be much appreciated
>
> Thanks
> Shikha Verma

EBS performance impact using it as a Data Source

I have a quick question on EBS performance. If I set up the EBS Database as a data source for SSRS (SQL Server Reporting Services), would there be a performance impact on EBS, due to SSRS accessing EBS Data for reports generation? Now, I know there'll always be a hit depending on the volume of data being accessed. But, my question is, will it be significantly higher using an external reporting tool using an ODBC connection rather than native XML Publisher.

I have a quick question on EBS performance. If I set up the EBS Database as a data source for SSRS (SQL Server Reporting Services), would there be a performance impact on EBS, due to SSRS accessing EBS Data for reports generation? Now, I know there'll always be a hit depending on the volume of data being accessed. But, my question is, will it be significantly higher using an external reporting tool using an ODBC connection rather than native XML Publisher.Hi,
Tough to answer without looking at data; my suggestion would be to have a test EBS environment setup, get permission from the vendors to run performance test without buying license - compare AWRs from both scenarios and then decide.
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Regards,

Performance Impact of Unique Constraint on a Date Column

In a table I have a compound unique constraint which extends over 3 columns. As a part of functionality I need to add another DATE column to this unique constraint.
I would like to know the performance implications of adding a DATE column to the unique constraint. Would the DATE column behave like another VARCHAR2 or NUMBER column, or would it degrade the performance significantly?
Thanks
Message was edited by:
user627808

What performance are you concerned about degrading? Inserts? Or queries? If you're talking about queries, what sort of access path are you concerned about?
Are you concerned that merely changing the definition of the unique constraint would impact performance? Or are you worried that whatever functional change you are making would impact performance (i.e. if you are now retaining historical data in the table rather than just updating it)?
Regardless of the performance impact, unique indexes (and unique constraints) need to be correct. If you need to allow duplicates on the 3 current columns with different dates, then you would need to change the unique constraint definition regardless of the performance impact. Fast and wrong generally isn't going to be preferrable to slow and right.
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Justin

Oracle Managed Data Provider 12.1.0.2 performs significantly worse than classic ODP on Connection.Open (3 secs vs 0.2 secs)

Oracle Managed Provider has many advantages over the classic Oracle Data Provider for .net.
However, our test show that connection.open take 3 seconds, where the classic ODP takes 0.2 seonds. Subsequent opens against the same connectionstring perform similarly for the two (0.1 seconds). Subsequest opens against a new connectionstring (another database) take 2 seconds for the managed provider and 0.1 seconds for classic.
This is not acceptable in some cases, but may be acceptable in others.
Has anyone seem similar behavior? Any suggestions that can improve connection.open performance?
Regards Niels Jespersen

Hi Alex
Thanks for helping out. I use simple username/password in the connectionstring: con.ConnectionString = "User Id=opslag;Password=xxxxxxxx;Data Source=DB_DST;";
Tracing gives me a tracefile of about 200 KB, which I will not quote here in its entirety. However, I can see that time spent is mostly spent around the snippet quoted below, if that reveals anything important. I will be happy to share the full trace-file and the source of the program. Please let me know.
Regards Niels
2015-01-23 12:55:54.998286 TID:1   (CFG) (SQLNET)   FilePath : O:\OraXP\TNS-Admin\sqlnet.ora
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2015-01-23 12:55:54.999286 TID:1   (PUB) (EXT) OracleConnection.ctor()
2015-01-23 12:55:55.005287 TID:1   (PRI) (ENT) (CP) ConnectionString.GetCS()
2015-01-23 12:55:55.009287 TID:1   (PRI) (ENT) (CP) ConnectionString.ctor()
2015-01-23 12:55:55.020288 TID:1   (PRI) (ENT) (CP) ConnectionString.Parse()
2015-01-23 12:55:55.031289 TID:1   (PRI) (ENT) (CP) ConnectionString.SetProperty()
2015-01-23 12:55:55.031289 TID:1   (PRI) (EXT) (CP) ConnectionString.SetProperty()
2015-01-23 12:55:55.031289 TID:1   (PRI) (ENT) (CP) ConnectionString.SetProperty()
2015-01-23 12:55:55.031289 TID:1   (PRI) (EXT) (CP) ConnectionString.SetProperty()
2015-01-23 12:55:55.031289 TID:1   (PRI) (ENT) (CP) ConnectionString.SetProperty()
2015-01-23 12:55:55.031289 TID:1   (PRI) (EXT) (CP) ConnectionString.SetProperty()
2015-01-23 12:55:55.031289 TID:1   (PRI) (EXT) (CP) ConnectionString.Parse()
2015-01-23 12:55:55.032289 TID:1   (PRI) (EXT) (CP) ConnectionString.ctor()
2015-01-23 12:55:55.032289 TID:1   (PRI) (EXT) (CP) ConnectionString.GetCS()
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2015-01-23 12:55:55.066293 TID:1   (PRI) (EXT) (CP) PoolManager`3.ctor()
2015-01-23 12:55:55.071293 TID:1   (PRI) (ENT) (CP) PoolManager`3.Initialize() (constr=User Id=opslag;Data Source=DB_DST;)
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2015-01-23 12:55:55.073293 TID:1   (PRI) (EXT) (CP) ConnectionString.Secure()
2015-01-23 12:55:57.662552 TID:1   (PRI) (EXT) (CP) PoolManager`3.Initialize() (pmid=56680499) (constr=User Id=opslag;Data Source=DB_DST;)
2015-01-23 12:55:57.664552 TID:1   (PRI) (BUF) (OBP.CTOR) (poolid:40362448) (OracleConnectionDispenser`3.GetPM)
2015-01-23 12:55:57.676554 TID:1   (PRI) (ENT) (CP) OraclePoolManager.Get()
2015-01-23 12:55:57.704556 TID:1   (PRI) (ENT) (CP) PoolManager`3.Get() (txnid=n/a) (bForceMatch=F)
2015-01-23 12:55:57.710557 TID:1   (PRI) (ENT) (CP) PoolManager`3.CreateNewPR() (txnid=n/a)
2015-01-23 12:55:57.922578 TID:1   (PRI) (ENT) TimeStamp.GetLocalTZOffset()
2015-01-23 12:55:57.922578 TID:1   (PRI) (EXT) TimeStamp.GetLocalTZOffset()
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Radiogroup data provider- WAD

Hi
I started using Web Application designer a couple of weeks ago and I need to create a web template with a radio group, but it had to be associated with a Data provider, which means a query view or a query.
However I don't want to associate to query/query view, I want the radio button to work like a hyperlink and when it's clicked it should show another webtemplate or a query report.
How can I have the radiogroup working but not connected to a dataprovider?

You can create a radiogroup like this
<FORM NAME="orderform">
<INPUT TYPE="RADIO" NAME="query" VALUE="1" CHECKED ONCLICK="get_radio_value()">Query1<BR>
<INPUT TYPE="RADIO" NAME="query" VALUE="2" ONCLICK="get_radio_value()">Query2<BR>
<INPUT TYPE="RADIO" NAME="query" VALUE="3" ONCLICK="get_radio_value()">Query3<BR>
</FORM>
The script to read the value of the button checked
<SCRIPT LANGUAGE="JAVASCRIPT">
function get_radio_value()
for (var i=0; i < document.orderform.query.length; i++)
if (document.orderform.query[ i ].checked)
alert(query[ i ].value);
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I have given a message box.In your case you can direct to a query page.
Regs
Gopi
Assign points if it helps...

Index creation online - performance impact on database

hi,
I have oracle 11.1.0.7 database running on Linux as 3 node RAC.
I have a huge table which has more than 255 columns and is about 400GB in size which is also highly fragmented because of constant DML activities.
Questions:
1. For now i am trying to create an index Online while the business applications are running.
Will there be any performance impact on the database to create index Online on a single column of a table 'TBL' while applications are active against the same table? So basically my question will index creation on a object during DML operations on the same object have performance impact on the database? is there a major performance impact difference in the database in creating index online and not online?
2. I tried to build an index on a column which has NULL value on this same table 'TBL' which has more than 255 columns and is about 400GB in size highly fragmented and has about 140 million rows.
I requested the applications to be shutdown, but the index creation with parallel of 4 a least took more than 6 hours to complete.
We have a Pre-Prod database which has the exported and imported copy of the Prod data. So the pre-Prod is a highly de-fragmented copy of the Prod.
When i created the same index on the same column with NULL, it only took 15 minutes to complete.
Not sure why on a highly fragmented copy of Prod it took more than 6 hours compared to highly defragmented copy of Pre-Prod where the index creation took only 15 minutes.
Any thoughts would be helpful.
Thanks.
Phil.

How are you measuring the "fragmentation" of the table ?
Is the pre-prod database running single instance or RAC ?
Did you collect any workload stats (AWR / Statspack) on the pre-prod and production systems while creating (or failing to create) the index ?
Did you check whether the index creation ended up in-memory, single pass or multi pass in in the two environments ?
The commonest explanation for this type of difference is two-fold:
a) the older data needs a lot of delayed block cleanout, which results in a lot of random I/O to the undo tablespace - slowing down I/O generally
b) the newer end of the table is subject to lots of change, so needs a lot of work relating to read-consistency - which also means I/O on the undo system
-- UPDATED: but you did say that you had stopped the application so this bit wouldn't have been relevant.
On top of this, an online (re)build has to lock the table briefly at the start and end of the build, and in a busy system you can wait a long time for the locks to be acquired - and if the system has been busy while the build has been going on it can take quite a long time to apply the journal file to finish the index build.
Regards
Jonathan Lewis

Performance Impact When Using SNC Communication

Hello,
Does anybody know if and how much performance impact there is if we use SNC for communication between the SAP Server and SAPGUI?
I think there are two areas that may be impacted; Network and server CPU.
For network load, I did find a part in "Front-End Network Requirements for SAP Business Solutions" document saying "overhead of roughly 350 bytes per user interaction step" but it does not specify the type of encryption. I wonder if there is any other info on this?
For CPU impact, how much overhead should I consider for sapgui access?
I see no field for this in the quicksizer and I can't seem to find any white papers on this subject.
Thank you in advance.

>
Peter Adams wrote:
> Ken,
>
> if you plan to use SAPcryptlib for SNC between SAP servers, then you should use a SAPcryptolib-compatible solution for the SNC communication between SAPGUI and SAP server, and there is only one vendor who can provide this. Let me know, if you need help finding it. My contact information is in my SDN business card.
Just so Kan is clear - It is not legal to use the SAP cryptolib provided by SAP for SNC between SAP GUI and SAP servers, so if x.509 is the desired mechanism you need to purchase additional software from the company which Peter works for to provide SAP GUI SNC-based SSO. I think instead, Kan might be using the free SAP supplied SNC Kerberos library, which is why I asked him to confirm this in my last post. I doubt he is interested to buy any third party software.
> As to the performance discussion: first of all, yes, there will be a small performance impact if SNC is used (no matter which type or implementation), but from our experience with many actual SNC implementations, I can state that this is practically not relevant. It is not noticeable by users. There were never any performance discussions with customers. See also SAP Note 1043694.
I agree with this - the performance impact is not noticed by users, but the system managers who look after the servers where SAP is installed, and the team responsible for the network need to be aware of any differences (if any) when SNC is turned on and when SNC is turned off. I think this is why Kan is asking these questions, not because he is concerned about users noticing any difference when they logon to SAP.
> Just a first quick comment on certain statements above: Tim's arguments for proving his overall statement are not conclusive from my perspective. Nor do I think his overall statement itself is correct.
The facts I mentioned are well known facts, e.g. symmetric crypto is far better from performance point of view than asymmetric. I know the examples I have shown which I found when doing a quick google search were not conclusive, but they were shown as initial examples, not necessarily the best examples. This is why I specifically mentioned that if you search in google yourself you will see many more references where comparisons are done between Kerberos (e.g. symmatric) compared with PKI (e.g. asymmetric).
> First of all, he only selects one aspect of performance - CPU impact of encryption algorithms.
No, I didn't. Some of the examples I referred to also discuss other differences. I also mentioend other differences such as memory and what protection level is used when configuring SNC.
> But for a true comparison, you'd have to look at all relevant aspects (latency, network overhead, ...).
Yes, I agree. No doubts here.
>Network performance overhead is usuallly worse with Kerberos than with PKI.
This is not true. When SAP is using SNC, the GSS-API standard is used and so the only network communication involves SAP software sending a standard GSS token from the workstation to the SAP server, and this GSS token is often about the same size, regardless of which mechanism is used, so any network performance differences are not related to the mechanism, but more related to the complexity of the cryptography used on each end (mostly on the server side).
>Second, you need to look at the specific usage scenario. For example, the first report referenced by Tim is an analysis about different Token Profile mechanism for WS Security, for one specific implementation. This does not allow to draw any conclusion for the SNC use case in general, and for sure not for a specific implemenation. It does not take the overhead for the encryption of the message content into account. Third, Tim associates PKI exclusively with asymmetric encryption. Yes, it is well known that asymmetric algorithms are slower than symmetric ones, but it is also well known that the encryption of the message content (by far the majority of the data) happens with symmetric encryption algorithms in the PKI scenario. With PKI-based SNC, you can even select a symmetric algorithm and use a more performant one that the ones that Kerberos prescribes.
Kerberos works with many different symmetric algorithms as well, so mentioning that the alg is selectable is not relavent to any comparison.
> To summarize, I will try and collect facts that will support the opposite point of view. From our practical experience, the performance overhead is not relevant, and criteria like consistency with SAPcryptolib, strength of security, ease of administration, choice of authentication and encryption mechanism, etc. are much more important.
>
> Peter

Change Tracker Performance Impact

MDM: 7.1
CE: 7.2
ERP: 6.0 EHP4
Hi,
We are currently using CE/BPM based central master data management. A custom application is being developed for collaborative master data authoring.
As part of the MDM configuration, the client wishes to track changes on MDM records for audit purposes. We are looking at the MDM Change Tracking facility provided by SAP but not sure about the performance impact it will have on the MDM server.
We have over 300 attributes for the object we wish to track for changes. Not all attributes will change all the time but it is expected that the overall number of changes every month will be over 1000, each change including approx 20-30 fields. The number of users is expected to be approx 15 initially but will increase over time.
I have seen on SCN forums people talking about potential performance degrade by enabling change tracking. Has anyone actually experienced performance degrade due to enabling change tracking for MDM records? If so, have you tried any means to keep the impact low e.g. by allocating more resources to MDM server?
Thanks and regards,
Shehryar
Edited by: Shehryar Khan on Dec 2, 2010 1:39 PM

Hi,
Change histoey does have impact on system performance. this can be controlled via regular archiving of Change History database. Lets say, Change history table data older than 3 months can be stored in another repository.
Second option could be to export all Change History data(Older than 1-2 days) to a BI system(using regular scheduled job), and have change hisotry report there. It will bring drastci change in MDM System performance. 1-2 days data can be viewed from MDM Change history database itself.
Regards,
Prashant
Edited by: Prashant Malik on Dec 3, 2010 1:58 AM

Performance impact of Multi Data Provider in WAD !!

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