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.

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Mikie B

Hello Mikie,
> Initially SAP loads data into sapdata 1 through sapdata4....
What do you mean with this?
> Is it better to build several additional sapdatas.
This depends on your storage. Normally if you have a high-range SAN storage it shouldn't matter. I have seen special cases where some disk ranks were overloaded .. but normally you should not think about that. If you don't have SAN and your load needs to be spread .. this is something different.
> Has anyone seen any possible performance issues only using sapdata1-4 especially with a 3 TB DB running 10.2.04?
Our main logistic system is round about 3.6 TB and stored in eleven sapdata directories .. but this partitioning has nothing todo with performance issues ... the reason for that is some limitation on OS level.
Regards
Stefan
P.S.:
> Can someone provide the pros cons of /oracle layout for ERP 6.0 production system?
If i extend or create a new tablespace i am wondering every time .. why sap is creating a sub directory for every data file by default .. absolutely freaky.

Oracle Retail 13 - Performance issues when open, save, approving worksheets

Hi Guys,
Recently we started facing performance issues when we started working with Oracle Retail 13 worksheets from within the java GUI at clients desktops.
We run Oracle Retail 13.1 powered by Oracle Database 11g R1 and AS 10g in latest release.
Issues:
- Opening, saving, approving worksheets with approx 9 thousands of items takes up to 15 minutes.
- Time for smaller worksheets is also around 10 minutes just to open a worksheet
- Also just to open multiple worksheets takes "ages" up to 10-15 minuts
Questions:
- Is it expected performance for such worksheets?
- What is your experience with Oracle Retail 13 in terms of performance while working with worksheets - how much time does it normally take to open edit save a worksheet?
- What are the average expected times for such operations?
Any feedback and hints would be much appreciated.
Cheers!!

Hi,
I guess you mean Order/Buyer worksheets?
This is not normal, should be quicker, matter of seconds to at most a minute.
Database side tuning is where I would look for clues.
And the obvious question: remember any changes to anything that may have caused the issue? Are the table and index statistics freshly gathered?
Best regards, Erik Ykema

11.2.0.0 upgrade- performance issue when commits

We have upgraded our data warehouse system from 10.2.0.4 for 11.2.0.2. After upgrade ETL system has performance issue. Extraction is fine because we compared the explain plans before and after upgrade. However, loading is taking very long. In loading there is a commit after every 1000 records, that why its slow. Even when we import data with commit=y option its very slow. Is there any know issue on this?
Any help pl?
Thanks

We are solaris 10. ETL job on 10.2.0.3 was taking 2 hours and now its taking 11 hours.
I beleive commit is a issue because
1. Source query (Extraction) has same explain plan.
2. Source database is still on 10.2.0.3
3. Servers and network is same for 10g and 11g.
4. I already experienced COMMIT=y performance issue in import.
Thanks

Post Netapp DOT Upgrade Performance Issue

We recently did some NetApp DOT upgrades. Everything went smoothly.Since then, one of our application development teams has started to report poor performance. We investigated all troubleshooting possibilities that we can think of - Windows servers layer, esxi host, storage and networks etc but to no avail. We've also engaged the software vendor and they have confirmed the app and db are adequately resourced. We also have a DBA investigating for us also.
One thing the application owner did mention is that performance started to degrade around Monday the 20th of July. Coincidentally or not, we did the Netapp DOT upgrade on the weekend of 18th/19th.The performance issues may not be linked at all but I just wondered if any others had experienced similar issues?Thanks.

Whats the controller model? Going from 8.1 to 8.2 on the entry \ some mid level controllers will have a performance impact

Mac Pro 2013 and Premiere Pro - The performance issue that Adobe don't want us talking about!

In May 2014 I bought a 2013 Mac Pro to help my business with the ever increasing demands video editing was placing on our systems. I was so excited to see how the 12GB of power the AMD D700s would affect my workflow and ability to edit footage seamlessly without delays to the creative process.
However, to my dismay pretty much since starting to work with the system I found that there was an issue with the GPUs, Mac OS and Adobe’s applications. It was first reported by many other users in early 2014 and as yet know one from Adobe has really commented officially on the issue.
Sadly it appears to still be present today and speaking with an Adobe rep confirmed this. Trouble is no one is doing anything about it. My hope is that, if you have watched this video and are experiencing the same issues then please let’s get the comments going, share and like the video and let’s get Adobe, Apple and AMD to pick up this with immediate haste! Thank you.
Below is a video of the problem I have been experiencing. It's a little long but I wanted to give a good account of the problem we are seeing so that someone can help! PLEASE, PLEASE, PLEASE help!
Mac Pro 2013 and Premiere Pro GPU Issue - YouTube
Thank you for your time and I'd love someone to help!

Thanks for responding! It's such a pain and I have been chatting to one of Adobe's senior consultants about this and still none the wiser. I have sent my machine off to the retailer as it was still under warranty. Nothing wrong with GPU apparently which is a relief although I kinda wish it had been that as it would have been an easier fix. Adobe told me that working with H.264 is totally possible but if you have a complex sequence with multicam and nested video with effects applied then it will seriously hinder performance. Sadly transcoding to ProRes doesn't seem to help either and they suggested not adding any effects to the nested clips, flattening out the multi cams etc and this has improved things a bit. Sent a sequence to SpeedGrade the other day though and the machine had a fit. FCPX though seems to be working great and has a few advantages over Premiere so I may be making a switch for this type of work until Adobe can sort out this issue. I still feel that the application isn't fully making the most of the GPUs. In fact, I found out that multicam is actually all still on the CPU and that they are trying to implement GPU handling of multicam soon.

SAP SRM Prod with Oracle DB and AIX 5.3 Performance Issue.

Hi Basis Gurus,
Today my SAP PRD system all of a sudden was running slow and users had difficulties executing TCodes as it took minutes before the screen appeared.My system is SAP SRM 4.00, Oracle Release 11.2.0.1.0 and AIX 5.3.
From Basis point of view , we noticed that all the work process were hanged due to RFCs' occupying it.Couldnt investigate further on the system as we needed to restart asap because users needed to log on. A quick check on SICK shows no errors.What we managed to find out is that we needed to check this parameter below and set it accordingly:-
rdisp/rfc_min_wait_dia_wp:-
Definition
Number of work processes kept free for other users.
Use
This parameter is used to reserve a number of dialog work processes for dialog mode. It prevents parallel RFCs from occupying all the processes.
The parameter rdisp/wp_no_dia specifies the absolute number of dialog work processes.
Unit: number of dialog work processes
Default value: 1
Example
If 10 dialog work processes are configured for the instance (rdisp/wp_no_dia = 10) and the parameter rdisp/rfc_min_wait_dia_wp = 3 is set, parallel RFCs can occupy a maximun of 7 dialog work processes. Three dialog work processes always remain free for dialog mode.
There are 20 DIA processes in our system, perhaps reserving a minimum of about 5 work processes for DIA users will be useful via the parameter.
So my first question would be is there any other suggestions besides adjusting the mentioned parameter above in order to ensure that no work processors going into hang state due to RFCs' occupying it as this issue always happens at the end of the month only when there are massive users accessing it.
When we went for a restart of the system we encountered another issue. Steps to the issue are as below:-
1) Did a proper shutdown of Oracle and SAP.
2) When we start using startsap script, it doesn't start DB so we started DB manually but listener was having problem
    so we stopped all.
3) We also did a cleanipc, it too throws below error:-
sidadm> cleanipc <systemno> remove
               exec(): 0509-036 Cannot load program cleanipc because of the following errors:
               0509-130 Symbol resolution failed for cleanipc because:
               0509-136   Symbol memmove (number 106) is not exported from
               dependent module /usr/sap/sid/SYS/exe/run/libsapu16.so.
               0509-192 Examine .loader section symbols with the
               'dump -Tv' command.
4) Also the Listener file has no contents,it's null file.
5) This is another error :-
    exec(): 0509-036 Cannot load program /oracle/sid/112_64/bin/tnslsnr because of the following errors:
    0509-150   Dependent module /oracle/sid/112_64/lib/libttsh11.so could not be loaded.
    0509-101   The module has too many section headers
    or the file is damaged
The libttsh11.so file was empty dated 25th timestamp as below in PRD:-
-rw-rr    1 sid   dba               0 Nov 25 07:12 libttsh11.so
Further checking has let me to understand this is an Oracle Bug from this link:-
http://gavinsoorma.com/2009/12/11-1-0-6-clusterware-upgrade-to-11-1-0-7/
This Oracle bug only happens in an Upgrade time and how could this happen to my Production system during a restart process.
Also this system was restarted during the last weekend's maintainance window and it came up with no issues.
6) We copied over the libttsh11.so from our QA environment to PRD and did a Startup:-
-rwxr-x---    1 sid   dba        65967496 Nov 25 07:40 libttsh11.so (This is the copied over file from QA)
7) After Startup everything has been in order till now.
My second question is what went wrong with the libttsh11.so file. How could it be 0 size in PRD when no signs of changes had happen to the PRD system. Is this a proven Oracle Bug or something else since I have never encountered anything like this before. Hope all the Gurus here could shed some light into my 2 questions as I am looking for positive answers.
Thank you.
Regards,
John

Hi,
Firstly I would suggest you to upgrade your database from Oracle Release 11.2.0.1.0 to Oracle Release 11.2.0.2 . This is the recommended Oracle 11g database version for SAP solutions. Many of your problem will get resolved with it.
Question 1:
So my first question would be is there any other suggestions besides adjusting the mentioned parameter above in order to ensure that no work processors going into hang state due to RFCs' occupying it as this issue always happens at the end of the month only when there are massive users accessing it.
For immediate resolution the approach you have followed is correct viz limiting number of dialog processes for RFC. Secondly you need to analyze why RFC processing takes so much time. You need check which programs are getting executed by those RFC.
Generate EarlyWatch report for more detailed view
Question 2:
My second question is what went wrong with the libttsh11.so file. How could it be 0 size in PRD when no signs of changes had happen to the PRD system. Is this a proven Oracle Bug or something else since I have never encountered anything like this before.
The libttsh11.so library cannot be found in the related directory.
Cause
The file system is mounted using CIO option, but per Note 257338.1 Direct I/O (DIO) and Concurrent I/O (CIO) on AIX 5L, an ORACLE_HOME on a filesystem mounted with "cio" option is not supported.
Such a configuration will cause, installation, relinking and other unexpected problems.
Solution
Disable the CIO option on the filesystem.
References
NOTE:257338.1 - Direct I/O (DIO) and Concurrent I/O (CIO) on AIX 5L
Hope this helps.
Regards,
Deepak Kori

RedHat AS4 and Oracle 10R2 upgrade - performance issue

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