topic Re: Performance Tuning in Application Development and Automation Discussions

Performance Tuning

Former Member — Fri, 12 Dec 2008 14:14:26 GMT

Hi,

Can we do furthur performance tuning on the below code. Thanks.

Best Regards

Suresh

form check_fac.

  data: begin of it_eslh_knumv occurs 0,
          packno like eslh-packno,
          knumv  like eslh-knumv,
        end of it_eslh_knumv,

        begin of it_ses_konv occurs 0,
          knumv like konv-knumv,
          kschl like konv-kschl,
          kposn like konv-kposn,
          kwert like konv-kwert,
          kpein like konv-kpein,
          kmein like konv-kmein,
          kbetr like konv-kbetr,
        end of it_ses_konv,

        l_idx like sy-tabix,
        l_kposn like konv-kposn.

  sort: it_essr by ebeln ebelp.

  loop at it_essr into wa_essr.
    wa_s994-mandt      = sy-mandt.
    wa_s994-zzebeln_02 = wa_essr-ebeln.
    wa_s994-zzebelp_03 = wa_essr-ebelp.
	(some more assignments here)
    loop at it_ses_package into wa_ses_package
      where packno_h = wa_essr-packno.

*     ESLH data
      wa_s994-zzpackno2 = wa_ses_package-packno_h.
      wa_s994-zzdel1    = wa_ses_package-packno_h.
      wa_s994-zzfpackno = wa_ses_package-fpackno.
      wa_s994-zzhpackno = wa_ses_package-hpackno.
      	(some more assignments here)

   loop at it_esll_plus2 into wa_esll_plus2
        where packno = wa_ses_package-sub_packno.
  wa_s994-zzintrow2  = wa_esll_plus2-introw.
  wa_s994-zzsrvpos   = wa_esll_plus2-srvpos.           
  wa_s994-zzmenge2   = wa_esll_plus2-menge.            
  wa_s994-zzktext11  = wa_esll_plus2-ktext1.    

        append wa_s994 to it_s994.
      endloop.                                               
    endloop.  
  endloop.  



* Get all the condition no. from ESLH for the sub package numbers
  select packno knumv from eslh into table it_eslh_knumv
     for all entries in it_s994
     where packno = it_s994-zzpackn_01.

* Get all the condition records from KONV
  select  knumv kschl kposn kwert kpein kmein kbetr
    from  konv
    into corresponding fields of table it_ses_konv
    for all entries in it_eslh_knumv
    where ( kschl = 'PRS'  or kschl = 'Z001'
    or      kschl = 'Z002' or kschl = 'Z003' )
    and     kappl = 'MS'
    and     knumv = it_eslh_knumv-knumv.

  sort it_eslh_knumv by packno knumv.
  sort it_s994 by zzpackn_01 zzintrow2.
  sort it_ses_konv by knumv kposn.

  if not it_ses_konv[] is initial.
    loop at it_s994 into wa_s994.
      l_idx = sy-tabix.
read table it_eslh_knumv with key packno = wa_s994-zzpackn_01 binary search.
      if sy-subrc = 0.
        clear l_kposn.
        l_kposn = wa_s994-zzintrow2.
        read table it_ses_konv with key knumv = it_eslh_knumv-knumv kposn = l_kposn binary search.
        if sy-subrc = 0.
          loop at it_ses_konv where knumv = it_eslh_knumv-knumv and kposn = l_kposn.

            if it_ses_konv-kschl = 'PRS'.
              wa_s994-zzkwert_p = it_ses_konv-kwert.
              wa_s994-zzkpein_p = it_ses_konv-kpein.
              wa_s994-zzkmein_p = it_ses_konv-kmein.
              wa_s994-zzkbetr_p = it_ses_konv-kbetr.
            endif.
            if it_ses_konv-kschl = 'Z001'.
              wa_s994-zzkwert_1 = it_ses_konv-kwert.
              wa_s994-zzkpein_1 = it_ses_konv-kpein.
              wa_s994-zzkmein_1 = it_ses_konv-kmein.
              wa_s994-zzkbetr_1 = it_ses_konv-kbetr.
            endif.
            if it_ses_konv-kschl = 'Z002'.
              wa_s994-zzkwert_2 = it_ses_konv-kwert.
              wa_s994-zzkpein_2 = it_ses_konv-kpein.
              wa_s994-zzkmein_2 = it_ses_konv-kmein.
              wa_s994-zzkbetr_2 = it_ses_konv-kbetr.
            endif.
            if it_ses_konv-kschl = 'Z003'.
              wa_s994-zzkwert_3 = it_ses_konv-kwert.
              wa_s994-zzkpein_3 = it_ses_konv-kpein.
              wa_s994-zzkmein_3 = it_ses_konv-kmein.
              wa_s994-zzkbetr_3 = it_ses_konv-kbetr.
            endif.
            at end of kposn.
              modify it_s994 index l_idx
                from wa_s994
            transporting zzkwert_p zzkpein_p zzkmein_p zzkbetr_p
                          zzkwert_1 zzkpein_1 zzkmein_1 zzkbetr_1
                          zzkwert_2 zzkpein_2 zzkmein_2 zzkbetr_2
                          zzkwert_3 zzkpein_3 zzkmein_3 zzkbetr_3.
            endat.
          endloop.

        endif.
      endif.
    endloop.
  endif.

endform.                    " check_fac

Edited by: Julius Bussche on Dec 12, 2008 4:19 PM

Re: Performance Tuning

Former Member — Fri, 12 Dec 2008 14:29:46 GMT

Please see [The Performance of Nested Loops|].

Rob

Re: Performance Tuning

Former Member — Mon, 15 Dec 2008 07:01:13 GMT

Hi,

1. Instead of using 'occurs 0' use 'types' in data declaration.

2. try to used field-symbol instead of work area or header line.

3. try to use Read statemene rather than nested loop

4. try to avoid move corresponding in select statement.

5. before using the 'for all entries' you should be check the table is initial or not.

6.in where clause we may write this where kschl in ( 'PRS' , 'Z001', 'Z002', 'Z003' )

i hope this is useful for u .

Regards:

Mahesh

Re: Performance Tuning

Former Member — Mon, 15 Dec 2008 13:39:08 GMT

Hi,

I recommend the measure-not-guessing approach:

check with SE30 and ST05 find out the longest running parts , then post the results here.

for the complete report:

For your expensive SQL statements:

bye

Re: Performance Tuning

Former Member — Mon, 15 Dec 2008 14:28:45 GMT

Hi,

Just go through your code & use for all entries if used joins.

Use all key fields when using for all entries.

Use binary search when reading...

Thanks,

Krishna...

Re: Performance Tuning

Former Member — Mon, 15 Dec 2008 14:46:14 GMT

Hi,

please ask yourself these questions:

why there is still a join syntax in OPEN SQL if you only need to speed up the performance with FAE?
why there are SAP Notes about FAE pitfalls and KNOWN performance issues with them?

Your apporoach is: I will turn all my problems into nails so I only have to use my hammer (wich is the only tool I need ever).

Sorry, but in reality you need a set of tools (means:Joins are not always evil, FAE are not always good)

bye

Re: Performance Tuning

Former Member — Fri, 30 Jan 2009 06:09:10 GMT

thanks.