topic Re: performace in Application Development and Automation Discussions

performace

Former Member — Wed, 25 Oct 2006 13:10:23 GMT

hi,

i need clarification regarding the run time analysis it will show the graphical output for system, database and abap. so if i want to reduce the correspoding time what are the steps we have to follow,

i mean for to reduce system timing what we can do,

for reducing database time what we can do,

for reducing abap time what we can do.

hope iam clear to all can any one of you help me out thanks in advance.

Re: performace

Former Member — Wed, 25 Oct 2006 13:13:17 GMT

for database : ask your basis to regenerate indexes

check your sql statment (use off keys , indexes, multiple joins etc ) - for checkin it use st05 sql trace

in abap : do not use nested selcts, nested loops , use sorted internal table where posible insteed of standard tables.

BR, JAcek

Message was edited by: Jacek Slowikowski

Re: performace

Former Member — Wed, 25 Oct 2006 13:17:32 GMT

Hi Madan,

You can do following:

1) reducing database time - Avoid using nested select.

avoid selecting data from clustur table.

basically optimize all Select statements taht hits Database.

2) Reducing abap time - Avoid using redundat code.

modularize ABAP code.

Use Subroutine/ FM etc.

3) Reduce system timing - Basically depends on system/ network congestion. Can't do much.

Reward points if this helps.

Manish

Re: performace

Former Member — Wed, 25 Oct 2006 14:35:13 GMT

Hi,

reduce database time

1) Remove corresponding from select satement

2) Remove * from select

3) Select field in sequence as defined in database

4) Avoid unnecessary selects

i.e check for internal table not initial

5) Use all entries and sort table by key fields

7) Try to use secondary index when you don't have

full key.

FORM SUB_SELECTION_AUFKTAB.

if not it_plant[] is initial.

it_plant1[] = it_plant[].

sort it_plant1 by werks.

delete adjacent duplicates from it_plant1 comparing werks

SELECT AUFNR KTEXT USER4 OBJNR INTO CORRESPONDING FIELDS OF TABLE I_AUFKTAB

FROM AUFK

FOR ALL ENTRIES IN it_plant1

WHERE AUFNR IN S_AUFNR AND

KTEXT IN S_KTEXT AND

WERKS IN S_WERKS AND

AUART IN S_AUART AND

USER4 IN S_USER4 AND

werks eq it_plant1-werks.

free it_plant1.

Endif.

ENDFORM. "SUB_SELECTION_AUFKTAB

2) reduce abap time

1) Remove selects from loop and use binary search

2) Modify internal table use transporting option

3) Avoid nested loop . Use read table and loop at itab

from sy-tabix statement.

4) free intrenal table memory wnen table is not

required for further processing.

3)Reduce system timeRegards

1) perform give types of formal parameters

perform add using a b.

form add a type i b type i.

Regards,

amole

Re: performace

Former Member — Wed, 25 Oct 2006 14:37:34 GMT

Hi,

Reduce system time avoid uploading legacy

data in foreground as it may take more resouces

and perfromance will be slow.

run complex jobs in batk ground mode.

regards

amole