Does CAST ( date as timestamp) causes performance issues

Hi
does casting from DATE to TIMESTAMP in a query or in a view causes the slow down of performance??
Please guide...
Thanks
Rimpi

Everything you do affect performance. How significantly is a question answered by testing not by asking questions on an OTN forum.
Create a loop doing it 10,000 times and find out.
And, in the future, always include your version number.

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WILL BIG INDEX WILL CAUSE PERFORMANCE ISSUE?

In an index table, if there are a lot of insert then data will grow and/or if the index is
huge then can it really cause performance issue?
Is there a document in metalink that says if index is 50% of data then we have to rebuild it? What are the basis and threshold of rebuilding index?

A big index by itself won't cause a performance issue. There are other circumstances you should consider for the index.
First of all, which kind of index are you talking about, there are several kind of indexes in Oracle. On the other hand, assuming you are talking about a regular B*Tree index, you should consider factors such as selectivity and cardinality. If the indexed column has evenly distributed values, then the index will be highly selective, and if the indexed column is highly skewed, in order for the index not to become a real bottleneck you should gather histograms, so selectivity can be calculated at execution time and in case the query retrieves a highly selective data range the index won't slow performance, otherwise a full table scan will be considered a best data access path.
Rebuilding indexes is an operation performed when the index becomes invalid, or when migrating the index to a new tablespace, but not when you suspect the index has become 'fragmented' in this case you should use the Coalesce command. Oracle provides efficient algorithms to maintain the index balanced.
~ Madrid
http://hrivera99.blogspot.com/

WEBUTIL - Does adding it to all forms cause performance issues?

If I add the webutil library and object library to all forms in the system (as part of a standard template) despite the fact most won't use it, will this cause any performance issues???
Thanks in advance...

The webutil user guide has a chapter on performance considerations. Have you looked at that?
The number one point from that chapter is:
1. Only WebUtil Enable Forms that actually need the functionality. Each form that is WebUtil enabled will generate a certain amount of network traffic and memory
usage simply to instantiate the utility, even if you don’t use any WebUtil
functionality.

SetAttribute causing performance issue.

Hi ,
I am using 11.1.1.4.0
Code:::
        DCIteratorBinding itr=ADFUtil.findIterator(iterator);
        RowSetIterator rsi=itr.getRowSetIterator();
        Row currRow=rsi.getCurrentRow();
        currRow.setAttribute(id,null);
If i call setAttribute multiple times(like 10-20 times) ,it causes severe performance issue .
Is there any reason for it ??
Should we avoid using setAttribute() ??If so then what we should use?
Any help is appreciated .
Thanks
Sazz

usecase is user wld see a existing vacancy record and able to update it.
GEVacancyFromNotificationVO1() is a query based vo and getGETranVacancyVO1() is a updatable VO . Now using view criretia i am pulling the record in the updatable VO , this will have only 1 record at 1 time.
GEVacancyFromNotificationVO1() gets the details and set then in attributes of the updatable VO as this VO includes many trasient attributes which are required in my jsff . Basicallly this data are not saved in DB but required to show in the UI.
Anyways now the thing is setAttribute as called 20-30 times you see , the performance is slow and sometimes data is not set as well.
I used attributeListImp class to create a name value pair and create a new row for this VO using createAndInitRow() and that works super fast . That is requied for another use case and works perfectly ok . Only when i want to update a existing record i have to update the same row. cant create another row, so facing this performance issue and sometime data doesnt set properly . i get null in DCiterator binding when i fetch the data in bean class.
So my question is why does setAttribute of AttributeListImpl is much much faster than setAttribute of Row class.??
public void initializeFromNotification(String role, String emp) {
        ViewObjectImpl notifyVO = this.getGEVacancyFromNotificationVO1();
        ViewObjectImpl transVO = this.getGETranVacancyVO1();
        ViewObjectImpl geLoginPersonIdVO = this.getGELoginPersonIdVO1();
        ViewObjectImpl autoPopulatevo =
            this.getGEAutopopulateHireSysforCopyVacanciesVO1();
        ViewObjectImpl geNextApproverVO = this.getGENextApproverVO1();
        ViewObjectImpl transHireVo = getGEHireSystemReqTeamTransVO1();
        ViewObjectImpl gejobdesc = getGEJobDescTransVO1();
        Row row = notifyVO.first();
        if (row != null) {
            //query the trx table
            transVO.setApplyViewCriteriaName("VacancyNumberVC");
            transVO.setNamedWhereClauseParam("p_vac_num",
                                             row.getAttribute("VacancyNumber"));
            transVO.executeQuery();
            if (transVO.first() == null) {
                return;
            } else {
                transVO.setCurrentRow(transVO.first());
            Row currentRow = transVO.getCurrentRow();
            List<String> transColumns =
                Arrays.asList(currentRow.getAttributeNames());
            //setting values from notification vo to transvacancy VO
            String arr[] = row.getAttributeNames();
            if (null != transVO.getCurrentRow()) {
                // AttributeListImpl attrList = new AttributeListImpl();
                for (String attr : arr) {
                    if (row.getAttribute(attr) != null) {
                        if (attr.equalsIgnoreCase("VacTrxId")) {
                        } else if (transColumns.contains(attr)) {
                            if (currentRow.getAttribute(attr) == null) {
                                currentRow.setAttribute(attr,
                                                        row.getAttribute(attr).toString());
            if (role != null && role.startsWith("ORG_MGR")) {
                transVO.getCurrentRow().setAttribute("userRole",
                                                     "INITIATOR_HM");
                transVO.getCurrentRow().setAttribute("userRoleDisplay",
                                                     "Hiring Manager");
            } else if (role != null && role.startsWith("HRM")) {
                transVO.getCurrentRow().setAttribute("userRole",
                                                     "INITIATOR_HRM");
                transVO.getCurrentRow().setAttribute("userRoleDisplay",
                                                     "HR Manager");
            } else {
                transVO.getCurrentRow().setAttribute("userRole",
                                                     "INITIATOR_RFO");
                transVO.getCurrentRow().setAttribute("userRoleDisplay", "RFO");
            transVO.getCurrentRow().setAttribute("EmpNumber", emp);
            geLoginPersonIdVO.setNamedWhereClauseParam("sso", emp);
            geLoginPersonIdVO.executeQuery();
            transVO.getCurrentRow().setAttribute("userPersonId",
                                                 geLoginPersonIdVO.first().getAttribute(0));

Oracle CPU Jan 2009 cause performance issue

I did installed Oracle CPU Jan 2009 on HP-UX machine. But once the installation is completed, users complaint saying that it takes more than 1 minutes to open a new ticket on that application. With this, it cause a backlog processess increase tremendously.
Will the CPU Jan 2009 patch cause any of the network performance issue:
Server: HP-UX Itanium 64 bit
Database: Oracle 10.2.0.3.0
Instances: 2 instances running on this server.
Edited by: user3858134 on Oct 26, 2009 9:30 PM

I believe the latest CPU Patch for Oracle 10.2.0.3 on HP is CPU Jan 2009 only.Don't you think your database should be on 10.2.0.4?
Anyways, do you have any benchmark statspack/AWR report? Can you compare that with the latest one? Do you see any difference?
Regards,
S.K.

Reporting Services Unicode Parameters Cause Performance Issues

When I create a report using string parameters, reporting services sends the SQL to SQL Server with an N prefix on the string parameters. This is the behavior even when the underlying data table has no unicode datatypes. This causes SQL Server to do a scan instead of a seek on these queries. Can this behavior be modified to send the parameters as non-unicode text?

Work around to overcome SSRS report performance due to UNICODE conversion issue:
I have used a new parameter (of type Internal) which collects/duplicates the original parameter values as comma separated in string.
In the report Dataset query, parse the comma separated string into a list into a vairable table using XML trick.
Use the variable table in WHERE IN clause
Steps:
Create a new Internal parameter (call it InternalParameter1)
Under Default Values -> Specify values : Add Exp : =join( Parameters!OrigParameter1.Value,",")
Pass/Use the InternalParameter1 in your dataset query.
Example code
DECLARE @InternalParameter1 NVARCHAR(MAX)
SET @InternalParameter1 = '100167600,
100167601,
4302853605,
4030753556,
4026938411
--- Load comma separated string to a temp variable table ---
SET ARITHABORT ON
DECLARE @T1 AS TABLE (PARALIST VARCHAR(100))
INSERT @T1 SELECT Split.a.value('.', 'VARCHAR(100)') AS CVS FROM
( SELECT CAST ('<M>' + REPLACE(@InternalParameter1, ',', '</M><M>') + '</M>' AS XML) AS CVS ) AS A CROSS APPLY CVS.nodes ('/M') AS Split(a)
--- Report Dataset query ---
SELECT CONTRACT_NO, report fields… FROM mytable
WHERE CONTRACT_NO IN (SELECT PARALIST FROM @T1) -- Use temp variable table in where clause
Mahesh

32 bit Agent causing performance issue on Win 64??

My OS is Windows 2003 64 bit server.
I am using Tomcat as my application server (version 6.0.20)
Java home is set to jdk1.6.0_14 (32bit). My agent is built on a 32bit platform. [I use the agent to gather specific data for profiling on specific commands].
Even if I simply enable the java_opts to load the agent, performance of my application slows down drastically. [Even if the agent does not do anything]. The same works fine when I run the agent on a 32bit machine.
Is this a known issue? Are there any work around for the same?
Any suggestions, help will be greatly appreciated.

Do not cross-post.
Closed.

Connect by cause performance issue in Table Based Value Set.

Hi,
In PO Requisition Distribution DFF we have added some segments.
I have a value set for party details in first segment (Attribute1) and returns the party site id (due to some dependency i cant make it return party_id).
Using the party_site_id i have to get all contact persons ( Need to Scan entire organization hierarchy to find contacts ) using organization relationship.
My Table Type Value set is written like below.
Table Name : HZ_PARTIES
Value : party_name
Id : party_id
Select party_name, party_id from hz_parties
where
party_id IN
(SELECT
Object_id
FROM hz_relationships hr
WHERE 1                =1
AND relationship_code = 'CONTACT'
AND subject_type       = 'ORGANIZATION'
AND subject_table_name = 'HZ_PARTIES'
AND object_type        = 'PERSON'
AND object_table_name = 'HZ_PARTIES'
AND status             = 'A'
START WITH object_id =
(SELECT party_id
FROM hz_party_sites
WHERE party_site_id = :$FLEX$.XX_PROJ_COUNTERPART_INST
CONNECT BY NOCYCLE PRIOR object_id = subject_id
This is working as expected but has poor performance. It's taking around 20 sec to 1 Min based data volume. Can this be tuned?
Any help will be appreciated.
Best Regards,
Ram

Hi Syed,
BP is right.
Just note: The phrase "i have passed most of the primary keys in the query..." does not mean the key is used for database access: Only key field in sequence starting with the first one will result in the use of an index, I.e. if the tables index fields are A B C D E F G, use of A, AB, ABC, ... will get the index used, CDE, BCD or EFG will not use the index at all.
Regards,
Clemens

Sorting causing Performance issues

Morning all,
I have written a report based on a materialised view that returns 36,000 rows in about 10 seconds. As soon as I put a sort on just one of the fields, the performance degrades. I have tried sorting it after the results are returned and ogt fed of of waiting so have now written the report again with the sort included at the beginning.
It has now been running for 30 minutes. If the query itself is exactly the same why is there such a hit on performance?
Any help would be greatly appreciated! I am using Disco 10G Desktop
Cheers
Col

Col.
I'd check a couple of things at this point.
a. first of all as you're checking a 'historic' view (I'm assuming this is an Oracle BIS view as I don't have access right now) that you might want to first be sure that it's being 'limited' by conditions correctly. I just looked at a Noetix HR help file - if you know Noetix you'll know what I mean - and although it's not what you're using directly, it has pertinent info on that basic set of tables. I can't paste what it says due to copyrights, etc. but essentially it mentions that there's a primary_flag, an assigment_current_flag and a current_employee_flag that you should make sure if the BIS view you're using let's you limit on. Additionally, it does say it returns records from multiple business groups so again, if your view has that column you might want to limit on that as well. That at least would make sure you're not returning multiple records for the same employee (and as many people do, just setting the tick mark in Disco to stop showing duplicate records!).
b. The problem with having a calculation - I assume - calling a function is that it will do it for every row that fits the condition (ie: again why you want to make sure in a. above that you're getting the least number of records). Obviously I can't see the code of the function you're referring to - as I assume it's an in-house built function) but it could be written ... oh let's say ... not optimally!
I know I recently read on this forum that there was someone - most likely Rod West as he's good in this area - who I thought talked about loading a function first? to maybe minimize, but you might want to search the forum.
c. Only other idea I can think of that would definitely help - but may cross your DBA's happy state of mind - is to create a function that creates a table first and then your report runs against that table. I did this at one client - and again, I know Rod's talked about this on the forum as well - where the first worksheet in Discoverer was called something like: 'Create Information'. It had a simple condition and parameter that let the user either go ahead and hit the okay button to start the process, or to get out at that point. Once it was hit, it called a function that simple built an Oracle 'temp' table (ie: it was always there to report against but if wiped out would create and fill) with heavy processing data. The function could create the information you wanted to report against - and in your case in the sort order you would prefer - and in much quicker time that going through Disco record at a time. Once the process was finished - about 10 minutes - it would advise you in the worksheet by finishing.
Then the 2nd./3rd., etc. worksheets were the actual, normal Disco reports retrieving and manipulating the data however wanted. As every worksheet was accessing this specific table, they screamed including sorting, etc.
So ... if you can't get the GET_SIT_DATA function to be quicker and your data never comes back, this is another idea - but you may encur the wrath of the DBA (they don't like tables being built in PROD (but their own ... of course)).
d. Of course, to check all this, I'd first turn delete the calculation call to the function GET_SIT_DATA, rerun the worksheet, sort and be sure this is the culprit.
Russ

Digital Signatures causing performance issue

I have created a form for a two-step process in which the first user will open, enter data, and submit the form for another user to approve. The problem is that during the approver phase, they will digitally sign the form (there are two digital signature fields for each section of the form, the approver is required to sign at least once in order to submit) and then submit, but the process seems to lag for about 20-30 seconds after they click submit.
I understand that the digital signatures may add to the size of the form overall, but is one or two signatures enough to cause a delay?
I have some javascript that I fire at the pre-submit event using AWS_Action to see what the user action is and if the user selects to submit then it will test to see if at least one signature field is signed and valid, if so then changes the signature field type to disabled (I have the signature fields become required type based on certain fields containg data) and submits the form. Is it possible that this script could cause such a delay after the submit? We aren't having any delays when the first user submits the form without digital signatures so I assume this is what is causing the problem.

I expect that the lag may be related to the script you are executing, rather that specifically by the digital signature itself. Are you able to test the form outside of the process to see if the lag remains? Could you change the submit button to a mailto: uri and see how long it takes for the "pre-submit" code to execute?
Regards
Steve

Changing the Database driver causing performance issue

Hello Experts
I am finding a strange issue where if I change the database to Oracle 11g ( you will find it if you click the database which you have created in physical layer) under Data Source definition the report takes a longer time to complete.
Actually I have upgraded the 10g rpd and catlog to 11g but database under data source definition was still using - oracle 10gR1 ( i donno whether this is a driver or not) . Everthing was running perfectly fine until I change the database under data source definition to Oracle 11g , the report takes a longer time . Also I found that the query is changed when I changed the database under data source definition to 11g.
Also to inform you that datawarehouse is Database 11g where the data lies.
what is the significance of Data source definition as changing it is changing the whole query.
Pls. help.

Hello,
Do you have the Full Oracle 11g DB Client installed on the same box where you are running your BI Server .? Also can you make sure you have copy of tnsnames.ora in following directories.
1. C:\Middleware\Oracle_BI1 \network\admin directory
2. C:\Middleware\oracle_common\network\admin
Check if the SQL Features that the datasource has , sometimes when you disable SQL features the server could issue a less effcient query to the database.
Thanks,
-SVS

MDX calculated measure causing performance issue

The calculated measure below against all product members is causing the excel pivot table to hang indefinitely. Any help on how to optimize the query for better performance?
SCOPE ([MEASURES].[DIDaysInMonth]);
THIS = CASE WHEN [Measures].[MonthDifference] < 0 THEN 0
WHEN [MEASURES].[MonthDifference] >= 0 AND ProjectedEnd > 0 THEN [MEASURES].[DaysRemainingInMonth]
WHEN [MEASURES].[MonthDifference] = 0 AND ProjectedEnd < 0 THEN
[Measures].[Ordered Cases] / (([Measures].[Forecasted Sales]-[Measures].[Cases])/[measures].[DaysRemainingInMonth])
WHEN [MEASURES].[MonthDifference] >= 0 AND ([Time Monthly].[Time Monthly].CurrentMember.PrevMember,[MEASURES].[ProjectedEnd]) <= 0 THEN 0
WHEN [MEASURES].[MonthDifference] > 0 AND ([Time Monthly].[Time Monthly].CurrentMember.PrevMember,[MEASURES].[ProjectedEnd]) > 0 THEN
([Time Monthly].[Time Monthly].CurrentMember.PrevMember,[MEASURES].[ProjectedEnd]) /
([Forecasted Sales] / [daysInMonth]) END;
END SCOPE;
BI Developer

Hi Abioye,
According to your description, you create a calculated measure which against all products in your AS cube, now the performance is poor when using this calculated measure in EXCEL Pivot table, right? In this case, here are some links which describe
tips about performance tuning in SSAS, plesae see:
http://technet.microsoft.com/en-us/library/cc966527.aspx
http://sqlmag.com/t-sql/top-9-analysis-services-tips
Hope this helps.
Regards,
Charlie Liao
TechNet Community Support

IPad 2 upgrade to iOS 8 causing performance issues?

I upgraded my iPad 2 to iOS 8 and it's now no longer functioning quickly enough to be usable. For example, it takes several seconds for the screen to simply shift from portrait to landscape. The delay in typing alone makes it unusable. Anyone else having the same problem? I tried to reinstall iOS 7 but wasn't successful. Anyone figure out how to fix this?

Adding more bellow.....
(Same issue happening to my iPad.... plus....when apps are opened they take too long too load up, at times there is a black screen, not just blank, but a black coloured screen. Than after waiting for it to open, after a few minutes of using the app (any app) or if I put my iPad to sleep to go do something else and go back to the app it is frozen and can not be used... so I must close it, so either by four finger swipe up or double clicking the home button and closing app and reopening it to work. This happens while reading emails as well. What about iCloud account not working, rejecting the password that works on an iPhone but not on the iPad! Annoying! Has anyone escalated these problems so that the Apple people do something about it. My iPad also gets real hot...this has been happening from the first time I purchased it, this has not stopped it still heats up, I have called and spoken to apple about it, around 3 or 4 times, but they keep saying its normal, but it's not...other friends that have iPads, and I have quite a few friends who do have an iPad, their iPads do not heat up like mine, and we would be at same meeting using our iPads! HELP US APPLE....)
Forgot to mention....multitasking gestures stop working...and that wifi gets disconnected on iPad to many times a day. the list is growing!! I think Apple is trying to get us to buy new iPada or iPhones, if they can add U2 album to your music list, then can do anything! I wonder....if we should all go get a windows based computer! My desktop is a dell..works just fine never had issues like these,

Performance issue during SharePoint list data bind to html table using Ajax call(Rest API)

Hello,
I am having multiple lists in my SharePoint Site. I am using SharePoint REST APIs to get data from these lists and bind a HTML Table. Suppose, I have 5 lists with 1000 records each, I am looping 5000 times to bind each row(record) to this html table. This
is causing performance issue which is taking a very long time to bind.
Is there any way So that I can reduce this looping OR is there any better approach to improve the performance. Please kindly Suggest. Thank you for your help :)
Warm Regards,
Ratan Kumar Racha

Hi Racha,
For handling large data binding in a page,
AngularJS would be a great option if you might would worry about the performance.
You can get more information about using AngularJS from the two links below:
https://www.airpair.com/angularjs/posts/angularjs-performance-large-applications
http://www.sitepoint.com/10-reasons-use-angularjs/
Best regards
Patrick Liang
TechNet Community Support

Load balancing issue causes performance problems!

Hi
Can someone tell me if there is a way to find the list of users who are logging into the system directly (without using a logon group)? They are hitting the CI which is causing performance issues. Eventhough we've setup system messages and repeated emails its hard to track who aren't following it.
Any ideas would be really appretiated rewarded with points.
Thanks
Arun

easy:
on the CI, change rdisp/gui_auto_logout to 60.
if they login and there is no activity for 60 seconds, they will be logged out promptly. they will stop trying to login into the CI after awhile.
and if they keep on trying, lock their account into SU01... they will get the message.
another possibility is a user exit on the logon screen. check the ABAP forum for this.

Does CAST ( date as timestamp) causes performance issues

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