on 10-14-2013 2:43 PM
Hi SAPpies.
Does anyone wanna share there experience in having more than 255 work processes in the same instance.
Having 377 workprocesses in the same instance seems to work OK, but the system message "Request (type NOWP) cannot be processed" keeps comming from the dispatcher. I tried with 186 in the first place and didn't have this message at all.
SAP Notes tells me to ignore the message but the number of messages in the system log is to HIGH to be ignored.
Best regards,
Teddy
Hi,
Follow SAP Note Note 1025358 - Request (type NOWP) cannot be processed.
The Queue information will vary depends on the HW Sizing.
Regards,
Gireesh
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Hello Teddy,
What a configuration, 377 Work process ?
You must be running your SAP on a really big server...
What are your hardware spec, OS version, SAP version & kernel version ?
How many SAP instances ?
SAP documentation is quite clear on that point creating too much process won't have a good impact on performance.
It would be interesting to know why you have created so many process, what is the goal of such a configuration ?
Best regards
1612283 - Hardware Configuration Standards and Guidance
An example is three ABAP instances each with 50 work processes has shown much better performance than one ABAP instance with 150 work processes.
Installing multiple ABAP or Java instances on a single physical server will allow the H/W resources to be fully leveraged.
9942 - Maximum number of work processes
Disadvantages of one large instance:
SAP recommends is 4 to 5 WP per process (ok, that one might not have been updated since a while)
http://help.sap.com/saphelp_nw73ehp1/helpdata/en/49/38111dc6d21ec9e10000000a42189b/content.htm
# Processor Cores | # SAP Work Processes |
1 | 5-7 |
2 | 10-13 |
4 | 20-25 |
> 4 | 4-5 work processes per processor |
http://www.insidesap.com.au/_literature_131360/High-end_customer_landscapes_based_on_SAP_HANA
Page 31
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I believe you referred to these notes:
Note 1025358 - Request (type NOWP) cannot be processed
Note 191234 - Syslog: Q0G K request (type NOWP) cannot ...
and the SAP solution to ignore these messages come from here.
If there is no option to get rid off these messages and if these messages are bothering then I would consider this solution.
Fourth possible solution: this option is for special cases only: You can install two small application servers on the same host. As a result, the users are distributed and the buffers do not overflow as often as before.
Regards
RB
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