Performance bottleneck on Production

Hi,
We have a Development ->Production in our landscape. Development system is rarely used.
Production system has 1.8 processing units, 9.5GB RAM, over 60% free disk space. We are experiencing performance issues. During peak hours the CPU usage is around 40% most of the time and at times suddenly rises above 150%. The are 140 users and all of them have to wait long to
carry out the day-to-day processing.
We experience long running jobs and response time is much more than the normal threshold.
Please advise if the hardware is suffiecient enough to withstand the system load. Help us fine tune the system.
Regards,
Sai R.

Hi Sai,
as EVERY performance problem:
It needs to be investigated FIRST and then you should make a descision !
You are talking on 1.8 CPUs - but you see 150% CPU Load - that is good news, as the CPUs can work on the one hand on the other hand we do not know, how many CPUs this LPAR has in reality - at least about 2.7 obviously ...
But: You never know, if the workload is the issue, or wrong customizing, missing indexes or bad ABAPs. This needs to be investigated and then you can do the appropiate stuff - but without that, it is just doing something without any useful reason.
The interesting thing here is, that even we that do these kind of analyzations pretty often, are often wrong with our first ideas ...
=> I do not believe anybody, that gives you a recommendation on the above (or a bit more) data ...
Regards
Volker Gueldenpfennig, consolut international ag
http://www.consolut.net - http://www.4soi.de - http://www.easymarketplace.de

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Array as shared memory - performance bottleneck
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Hello,
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I used:
Software:
1)Windows Vista 64bit,
2) java version "1.6.0_14"
Java(TM) SE Runtime Environment (build 1.6.0_14-b08)
Java HotSpot(TM) 64-Bit Server VM (build 14.0-b16, mixed mode)
Hardware:
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Test3: array initialization in many threads on many arrays
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Mylenium

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Thoughts?

>
1. DBA team to find a way to identify specific Querios/DBOperations that are taking too long. (add references here)
2. App team to collaborate with the App manufacturer's support organization to see what design changes or parameters could alter the nature of queries being generated or affect the size of the underlying tables. (too specific for each 3rd party app)
3. After exhausing (2), DBA team to analyze the remaining culprit queries and find ways to obtain better performance without changing the query or the size of the database tables via indexes/DB parameters/etc.. (add references here)
4. After exhausing (3), DBA/Unix admin team to identify which specific hardware bottlenecks are being faced (CPUs/storage/memory) to see if hardware changes can help obtain better performance.
>
In general your approach is correct.
However I'd put priorities different way.
1. DBA team to find a way to identify specific Querios/DBOperations that are taking too long. (add references here)
2. DBA team to analyze the culprit queries and find ways to obtain better performance without changing the query or the size of the database tables via indexes/DB parameters/etc.. (add references here)
With collaboration with the App manufacturer's support if required.
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Edited by: user11181920 on Nov 7, 2012 3:20 PM
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SAP has a methodology to size your HW depending on volume of data, number of users and quantity of transactions.
Sizing should be re-done if your data grown beyond the volume that had been used for initial SAP sizing.
4. After exhausting (3), App team to collaborate with the App manufacturer's support organization to see what design changes or parameters could alter the nature of queries being generated or affect the size of the underlying tables. (too specific for each 3rd party app)

Does BPM - for a synchronous interface have a performance bottleneck

Hi All,
Just have a small query.
We have a scenario in which we need to receive PO details from a legacy system, create a sales order in ecc and send back a response table to the legacy system.
Our understanding is that this can be acheived using synchronous ABAP Proxies and also involves BPM and Abstract mappings.
I beleive that this should not pose any problems. My concern here is that we are confused as to whether BPM would have bottlenecks with performance. Do we have any SAP document or article which mentions that for synchronous interfaces BPM is the only way to go and this would not have a significant impact on the performance.
Another approach to the problem would be to create an asynchronous inbound proxy, write ABAP code within it and call a seperate outbound asynchronous proxy within the inbound proxy method. This approach looks and sounds very clumsy.
Kindly let me know your thoughts or any links which would be useful.
Thanks & Regards,
Mz

Hi Aashish,
Thanks for your quick reply. it was helpful, but i am not using RFC's. Correct me if i am wrong, but i have explained the scenarios in detail below.
Scenario 1. Synchronous
1) PI Picks file from a common folder.
2) PI does a data mapping and sends the data to ECC.
3) ECC contains an inbound interface which receives the data and in which abap proxy code is written.
4) The abap proxy code executes a function module and sends the response as an internal table back to PI.
5) PI receives the response and places it in a text/csv file and places it back to another folder.
I assume that the above would be possible only using BPM. What i understand is that in order for an interface to receive and send data, abstract mappings are to be used, and for this BPM is required. We do not have any conversions etc. its just a simple matter of receiving an internal table from ECC and creating a file to place in the folder.
I also understand that BPM could have bottlenecks due to queue and cache issues, messages might be pending, or lost etc.
Scenario 2. Asynchronous
1) PI Picks file from a common folder.
2) PI does a data mapping and sends the data to ECC.
3) ECC contains an inbound interface which receives the data and in which abap proxy code is written.
4) ABAP Proxy code executes the same function module and calls a seperate outbound interface and passes the values to it. This would be used in sending the response back.
5) PI receives the response from the second interface and places it in a text/csv file and places it back to another folder.
I would like to know which would be the better approach. Documentation/references to support your claims would be much appreciated.
Cheers,
Mz

Severe performance issues in production database

Hi Experts,
we have configured RMAN in our production database recently using some 3 party tool COMMVAULT.
Problem is just 47 GB database taking around 6 hrs of time to complted the bakcup job. Please let me know what could be the reason.
Further to this issues i found out some of few things, our application vendor commissioned this database server and it seems that they done some changes in TIMEZONE settings.
when i query against some of few dictionary tables for example dba_schedular_jobs i am getting the following error.
ORA-01882: timezone region %s not found
when ever i connect the database , the connection itself is very slow and suffering severe performance issues in my production database.
You help would be much appreciated.
Regards,
Salai

Hi,
also let us know if you use asm or local file system for datafiles.
Your backup strategy will also be helpful:
Do you make compressed backups?
Full or incremental?
To where do you backup the database? To the local filesystem, SAN Volume, Offsite Storage, Tape storage?
Is there any other jobs running while the RMAN job is running?
Please post the stats that you have gathered over the time period when the backup is running.
Thanks.

Performance bottleneck on Production

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