Maximum number of dialog work process

Hello gurus,
Could you please let me know what is the maximum number of dialog work process that you can configure in an Netweaver system with ABAP 7.0 before considering to install a new application server to distribute the load?
Thaks for your help,
Best regards

> Just one question, according to the following statement, can I think that I should estimate a usage of 1/4 CPU core by every dialog WP?
No, this was just an example to make clear what I mean.
> Do you know any SAP note that could help me to estimate the number of WP according to the load of the system?
There is no such note and there can't be.
You could have a system with e. g. 100 users where 10 of them do really produce load, the other 90 may just run a few transactions or do just nothing - so 50 WPs is too much. You could also have a system with 20 users where ALL are entering data all data and doing reporting and stuff so 20 WPs is too less. There may also be processes like ATP that use one background worprocess and spawn a number of dialog WPs you configure in the application. If you configure too few of them, the ATP run will run very log, if you configure too much, the system will be overloaded and slowing down. I can imagine dozens of other examples what may cause load or not.
Because of that it's not possible to give a formular how many WPs to be configured for how many users.
This is a tuning thing and needs to be estimated in the first weeks after a GoLive; watch the system, reconfigure, watch. Check ST03N and SM50/SM66 or book an early watch after some time, they have rough estimates and give usually good advises. Out of theory it's almost impossible to predict something.
Markus

Similar Messages

Long Running dialog work process in production ststem

Dear Friends,
IIn our production system one dialog work process is running more then 5 days. i can not terminate or cancel the process.'
I tried all the ways to cancel the work process. i restart the system (offline backup) but still that work process are showing running status....
Kindly advice....
Thanks & Regards,
Sundar.C

IIn our production system one dialog work process is running more then 5 days. i can not terminate or cancel the process.'
I tried all the ways to cancel the work process. i restart the system (offline backup) but still that work process are showing running status....
Maximum runtime of dialog work process is controlled by parameter rdisp/max_wprun_time I am not sure how it is possible to have dialog work process running for so many days. Secondly, when you restart the system means new PIDs will be allocated and it will be not the same dialog work process. Check SM50, trace information for more details and clues.

Number of DIA work processes

Hello,
How do we decide the maximum number of DIA work processes (or total number of work processes including others like BGD, SPO, etc) that our server/hardware will support?
Secondly, we found that in the instance profile for one app server, parameter value for number of DIA is set as 30. However, in the SM50 for that instance, we only found 25 DIA work processes (no changes were made after system start in RZ03/RZ04). Any inputs?
Regards,
NK

When the instance is started, as many work processes as the sum of the following parameters are started:
rdisp/wp_no_dia
rdisp/wp_no_vb
rdisp/wp_no_vb2
rdisp/wp_no_enq
rdisp/wp_no_bt
rdisp/wp_no_spo
rdisp/wp_no_restricted
The sum of the parameters must be smaller or equal to the value of parameter rdisp/wp_max_no
From <http://help.sap.com/saphelp_nwpi71/helpdata/en/46/c24a5fb8db0e5be10000000a1553f7/frameset.htm>
Please let me know if your sum> rdsip/wp_max_no ?

Maximum number of dialog processes for sending data

Hello All,
How to change the Maximum number of dialog processes for sending data from default value ?
I see this infopackage->Scheduler->Settings for Sending Data--
>Maximum size of a data packet as 3 .....Can we increase this setting to 5 for faster extraction?
if yes,,,please let me know how & where we can change this...
Thanks,

Hi,
in the source system table:table ROIDOCPRMS
change these:
MAXSIZE
MAXPROCS
STATFRQU
thnks.

Increasing Dialog Work Process

Hi All
In one of our Applicaion Systems we initially had allocated only 2 Dialog Work Processes, now we want to increase this, without reducing any of the other Work Processes.
How is it possible ?
Regards
Biju Kumar

You can increase the number of work processes by either:
increasing the parameter rdisp/wp_no_dia in RZ10 (restart required to take effect)
Or by creating an operation mode in RZ04.
By creating an operation mode you can switch between Operation modes at certain times of the day (SM63).

How to statistic the rest dialog work process?

Dear Gurus,
Is there some method we can statistic the rest dialog work process in every ten minutes in our sap ECC prd system(ECC 6.0)？(I want to use the number to evaluate our SAP system's performance. Esp, at the business peak period.)
Thank you!
Jason

Hi Jason,
If I understand correct, you want to find out number of required work processes.
You can find it, by using "ST02 -> Go to -> Current Local Data -> SAP cursor cache -> ID cache" path. On this table, you can analyze how many work processes are really running and how many work processes are waiting at the idle state.
There is no time based values, about these statistics. These values indicate current stats.
Best regards,
Orkun Gedik

How to find out number of background work processe available in the system?

Hi All,
I have a FM that triggers a background job using JOB_OPEN, ABAP_SUBMIT and JOB_CLOSE. But the problem is if there are no background work processes available at that moment, it does not return error. Not sure whether the job is even scheduled!
Is there a way to find out if there are any background work processes available in the system? I know a FM SPBT_INITIALIZE which gives info about dialog work processes. Is there any other FM similar to this which gives info about background wp??
Regards,
Shailesh

your Job will remain in a queue by message handler. once workprocess is free, your job gets scheduled
by the way, you can use the functionality used in FM TH_DISPLAY_WORKPROCESS_LIST to read the workprocesses
the command which gets you the workprocess is:
CALL 'ThWpInfo' ID 'OPCODE' FIELD OPCODE_WP_LIST
ID 'TAB' FIELD LIST_STATE_WPLST-TABL
ID 'CPU' FIELD LIST_STATE_WPLST-CPU.
check how its written in include LSDEBF01, form SET_LIST_WPLST
Edited by: Soumyaprakash Mishra on Dec 12, 2011 12:17 PM

Dialog work process in stop gui status

Hi,
there are lots of dialog work process are stuck status due to stop gui error.
stop gui work process are not getting released automatic from the system due to this many users are facing problem and they are getting sap slow problem.
to resolve the issue we have to kill the work process manually from the system by using tcode sm66.
kindly help to resolve the issue.
Regards,
Koushal Solanki

Hi,
kindly find the log below
M *** WARNING => ThAdXDelUser: delete T149
M *** ERROR => ThCheckEmState: no em context for T2/M0 [thxxmem.c    381]
M *** ERROR => ThCheckEmState: no em context for T2/M0 [thxxmem.c    381]
C
C Wed May 19 09:01:40 2010
C build_stmt: reallocating stmt buffer: 2304 -> 3312 characters
C build_stmt: reallocating stmt buffer: 3312 -> 4328 characters
C build_stmt: reallocating stmt buffer: 256 -> 2000 characters
C build_stmt: reallocating stmt buffer: 2816 -> 3822 characters
C build_stmt: reallocating stmt buffer: 3822 -> 4823 characters
C build_stmt: reallocating stmt buffer: 512 -> 2000 characters
C build_stmt: reallocating stmt buffer: 2048 -> 3050 characters
C build_stmt: reallocating stmt buffer: 3050 -> 4052 characters
M
M Wed May 19 09:01:42 2010
M *** ERROR => ThCheckEmState: no em context for T2/M0 [thxxmem.c    381]
M
M Wed May 19 09:01:57 2010
M *** ERROR => ThCheckEmState: no em context for T2/M0 [thxxmem.c    381]
M
M Wed May 19 09:04:46 2010
M *** ERROR => ThCheckEmState: no em context for T2/M0 [thxxmem.c    381]
B ***LOG BY4=> sql error 60     performing SEL on table NRIV       [dbtran#4 @ 7588] [dbtran 7588 ]
B ***LOG BY0=> ORA-00060: deadlock detected while waiting for resource [dbtran#4 @ 7588] [dbtran 7588 ]
B dbtran ERROR LOG (hdl_dbsl_error): DbSl 'SEL'
B   RSLT: {dbsl=99, tran=1}
B   FHDR: {tab='NRIV', fcode=33, mode=2, bpb=0, dbcnt=0, crsr=1,
B          hold=0, keep=1, xfer=0, pkg=0, upto=0, init:b=0,
B          init:p=(nil), init:#=172, wa:p=0xc0000004440b6120, wa:#=172}
B dbtran ERROR LOG (hdl_dbsl_error): DbSl 'SEL'
M Wed May 19 08:57:25 2010
M *** ERROR => ThCheckEmState: no em context for T2/M0 [thxxmem.c    381]
C
C Wed May 19 08:58:57 2010
C     OCIStmtExecute() failed with -1=OCI_ERROR
C     SQL error 60:
C *** ERROR => Error 60 in stmt_fetch() from oci_execute_stmt(), orpc=0
[dbsloci.c    12990]
C *** ERROR => ORA-60 occurred when executing SQL stmt (parse error offset=0)
[dbsloci.c    13011]
dispatcher log
Wed May 19 15:13:43 2010
ERROR => DpWPCheck: max_hold_time W2 exceeded (T140=msb85       ) [dpxxdisp.c   15928]
ERROR => DpTmRetErr: DpTmSend [dpxxdisp.c   13138]

What is the Max Number of Total Work Process that we can Have on One C.I

Hi,
What is the Max Number of Total Work Process that we can have on a Single C.I
Is there any Limit that We can only have Perticular Number of Total work process ?
Or it is just Unlimited number of total work process
Thanks & Regards
Dan.

from the system throughput point of view a rule of a thumb is:
1 up to 4 sometimes 5 workprocesses per CPU.
(one is used in Benchmarks where you have a very small number of transactions running with a small amount of database accesses)
you can easily find it out:
configure 4 WPs per CPU. If you have a number of WP's consuming nearly no CPU time you can reduce the number of WPs.
regards
Peter

Dialog Work process being blocked

Hi All ,
I deleted one of the sessions using ctrl + alt + del in one of my application server. Now when i checked using work process overview through sm51 in that application server (logged in through other application server). The dialog work process is in the running status and it is still held by me for a long time.
can anyone suggest me that I go for cancelling the process by choosing
Process -> cancel without core. I have already tried terminating the session through sm04. I would like to add one more thing that in action column of the work process overview is shown as roll out.
Regards
Gaurav

Hi gaurav,
You can cancel the Process using CANCEL WITHOUT CORE , incase if you do not require a log details for that particular Work Process.
You can cancel the Process using CACEL WITH CORE , incase if you want a Log details for the same !
The same activity can be performed at Operating system level using the "dpmon" utility.
Regards,
Prem

Dialog work process

Hi Experts,
I am working as a BASIS Consultant,I have one doubt.
In our company about 50 users are there.If all 50 users are logged into the SAP PRD System,In SM50 tcode dialog work process are 9 free out of 10.
how many users can use one dialog work process. Please let me know.If any doubt please ask me.

Hi Patan,
Please understand the concept of work process understand it's not a 1-to-1 relationship between DIA workprocess and user.One Dialog process can handle multiple users and is solely based on the activity performed by the user.Logged users wont occupy 100% of workprocess unless it goes to "private"/PRIV mode.If you found any user any priv mode check whether he is performing any backgroud/batch processing updates.If found idle kill the process in SM51 as it will consume more memory leads to high cpu utilization.The Dispatcher handles all the request of all users and put them in the Dispatcher-queue, and this will be forwarded to a DIA workprocess as soon as it became idle, even in milliseconds, so that's why it can handle hundreds of requests in this queue.
Please read the documentations on dispatcher to understand the process better.
https://help.sap.com/saphelp_46c/helpdata/en/fc/eb2e7d358411d1829f0000e829fbfe/content.htm
notes on work process - ABAP Development - SCN Wiki
Dispatcher & Work Process
Hope it will address all your doubts.Please close the thread once you are fine with answers as these are the frequently asked questions.
Regards,
Kannan

Help regarding dialog work process

hello experts,
In S.A.P abap or abap+java,why we need atleast 2 dialog work process.Is that 2 dialog work process are used for any extra functions?

Hi,
it is mandatory to have two dialog work processes within an ABAP-Instance.
There is no way around.
It is the same for enqueue process, you have to have exactly one for your ABAP system.
(Remember: an ABAP system can persist of many instances, but only one central instance).
Hope, this is helpful.
Kind regards,
Achim
P.S. Never the less, this is the wrong Forum for your question.

Dialog work process and single-sign on

Hi,
I have read that we should have atleast 2 dialog work processes configured.
can anyone tell me the reason why?
what is the concept behind single sign-on?
much appreciate ur help.
regards,
swaroop.

Hi Swaroop,
I have never heard of something like that before...
You can read more about single sign on here,
https://www.sdn.sap.com/irj/sdn/itpractices?rid=/webcontent/uuid/01c62876-0a01-0010-f5a5-d39e7651b9fd [original link is broken]
and here,
http://help.sap.com/saphelp_nw04/helpdata/en/94/695b3ebd564644e10000000a114084/frameset.htm
Regards
Juan
Please reward with points if helpful

How to moniter the max quantity of used dialog work process in SAP system

Dear Gurus,
The quantity of Dia Work Process(DWP) of APP1 is: 16 (rdisp/wp_no_dia=16)
The quantity of Dia Work Process(DWP) of APP2 is: 16 (rdisp/wp_no_dia=16)
The quantity of Dia Work Process(DWP) of APP3 is: 20 (rdisp/wp_no_dia=20)
The quantity of Dia Work Process(DWP) of APP4 is: 20 (rdisp/wp_no_dia=20)
So the quantity of DWP in our SAP system is: 72 (=161620+20).
We have 75 dialog users and many RFC callings via JCO method from J2EE system.
I'm afriad the 72 DWPs will be run out of use someday.
So I want to moniter the max quantity of used DWP every per hour to prevent the situation I mentioned above.
Could you give me some suggestions?
Thank you very much..
Jason

Hi Olivier,
I really appreciate your help. You told me a very useful clew!
As the method you told me, I have some questions:
(a3) Do you restart your 'CI + 6 DIA' separately every week? Why did you do that?
(a4) How to calculate 'CPU intensive time'? For example, App server 'APS' was restarted on 8-10-2011 and stopped on 8-20-2011.
There was a DWP(PID 557550) was created and activated on APS during this period(10 days). So If I add up each 'cpu time' of the task
which 557550 executed, I can get the 'CPU intensive time' of 557550 (dispalyed in SM50). Right?
    In other words:
       DWP(PID 557550) finished task1: cpu time = 5ms 8-10-2011
       DWP(PID 557550) finished task2: cpu time = 4ms
       DWP(PID 557550) finished task3: cpu time = 6ms 8-20-2011
     So the 'CPU intensive time'(Between 8-10-2011 and 8-20-2011) of DWP(PID 557550) is: 15ms (5ms4ms6ms). Right?
(a5)Can we moniter the 'CPU intensive time' of DWPs in CCMS automatically? (I want to prevent the situation: The DWPs in our entire ECC are occupied.)
Thank you!
                                                                                Jason

How to moniter the max quantity of used dialog work process in our SAP syst

Dear Gurus,
The quantity of Dia Work Process(DWP) of APP1 is: 16 (rdisp/wp_no_dia=16)
The quantity of Dia Work Process(DWP) of APP2 is: 16 (rdisp/wp_no_dia=16)
The quantity of Dia Work Process(DWP) of APP3 is: 20 (rdisp/wp_no_dia=20)
The quantity of Dia Work Process(DWP) of APP4 is: 20 (rdisp/wp_no_dia=20)
So the quantity of DWP in our SAP system is: 72 (=161620+20).
We have 75 dialog users and many RFC callings via JCO method from J2EE system.
I'm afriad the 72 DWPs will be run out of use someday.
So I want to moniter the max quantity of used DWP every per hour to prevent the situation I mentioned above.
Could you give me some suggestions?
Thank you very much..
Jason
Edited by: jason xu on Aug 22, 2011 6:20 PM

duplicate thread !!

Maximum number of dialog work process

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