Question Re: Average dialog response time in Technology Q&A

Average dialog response time

Former Member — Wed, 16 May 2012 10:48:42 GMT

Hi All,

Is there any value which is recommended by SAP for average dialog response time (ST03)? bcz in our system it is showing 7,000 but seems to be performance is good .

Please let me know .

Thanks,

sai.

Re: Average dialog response time

Former Member — Wed, 16 May 2012 10:55:16 GMT

Hello Sai,

SAP benchmarks (www.sap.com/benchmark) use 1000ms as reference.

All hardware benchmarks have 1s response time.

Some organizations have set KPIs to response time values. Normal values are 500ms and 750ms, according to my experience.

The real target value of course depends on business requirement.

If the users are happy with 7000ms and there are no influence on business, then why not keep 7000ms.

BR,

Samuli

Re: Average dialog response time

Former Member — Wed, 16 May 2012 12:32:57 GMT

Thanks for your replay Samuli ,

But are there any ways to improve Dialog response time ?

Re: Average dialog response time

Former Member — Wed, 16 May 2012 12:39:09 GMT

Hi Sai,

Of course there are ways to improve performance.

Analysis:

- do a response time breakup using ST03 statistics, to see which component is taking most time

- analyze your database I/O performance in ST04

- analyze top response time transactions in more detail (ST03, STAD)

- analyze top expensive SQL statements in more detail (ST04, ST03, EarlyWatch alert report)

- analyze CPU usage (ST06, OS07, OS dep. tools)

- analyze RAM usage and paging (ST06, OS07, OS dep tools)

- check whether your SAP memory parameters are OK (ST02)

- check whether DB paramaters are OK (DB specific notes)

Optimizations:

- create indexes according to SQL analysis

- let ABAP programmer take a look at heavy transactions and report (especially Z-code)

- increase CPU processing power

- increase server RAM

- adjust database parameters

- adjust SAP instance profile parameters

BR,

Samuli

Re: Average dialog response time

Former Member — Wed, 16 May 2012 12:58:44 GMT

Hi,

If the average dialog response time is really 7000 ms, it seems awfully bad to me.

We just had a major performance crisis on our ECC6 system because the average dialog response time went up from 800 ms to 2200 ms after a hardware change.

Now that the I/O problems on the Disk Array are gone the response time is back down to 600 ms and the users are happy again...

Best Regards,

Olivier

Re: Average dialog response time

Former Member — Wed, 16 May 2012 13:11:00 GMT

Olivier

nothing to do with this post iteself. Is there a possibility to have a fair conversation with you if you ever solved the lock index from ESS issue? I am going to change the standard code I wonder if there is any other availble solution.

Thanks

Andrea

Re: Average dialog response time

Former Member — Fri, 18 May 2012 19:35:07 GMT

Hi Sai,

Avg Dialog response time 7000ms is too high, if you are talking about an ECC system. As this means that users need to wait for 7 secs for a dialog step to happen, which is really high. You need to analyze the reasons for high response time and then take measures to improve it.

Samuli has listed the ways how you can analyze the high response time. Let me know if you need more info on this.

Regards,

Pradeep

Re: Average dialog response time

khampariamukesh — Fri, 04 Oct 2013 11:11:11 GMT

Response Times: Rules of Thumb

Performance Data	Time
Average response time	approx. 1 second (dialog), <1 second (update)
Average CPU time	approx. 40% of average response time
Average wait time	<1% of average response time
Average load time	<10% of average response time
Average DB request time	approx. 40% of average response time

Database Requests	Time
Direct reads	<10 ms
Sequential reads	<40 ms
Changes	>25 ms

High Values for	Reason
DB req. (Change/Comm.)	Database or index problems?
Load time	Buffer problems?
Wait time	Not enough work processes? Locked tasks? Long-running transactions?

http://help.sap.com/saphelp_46c/helpdata/en/c4/3a6af1505211d189550000e829fbbd/content.htm