Slow Perforamnce while executing the customizing program

Question

HI All
My Prd server hardware are consist of 2 itanium processor, 8gb ram and 20gb pagefile with the 500 GB SAN Storage for the datadisk.
I have almost 250 users on my PRD server over the 8 branches with the WAN connectivity. I have been set the 15 wp, 4 update process, 4 background process, 1 spool and UP2. Also, my profile parameter are paste down.
Always, i have slow perforamnce issue with the following setting, my hardware are enough to handle these requese as we did sizing in the begining of the project and have been monitoring my hardware by the st06 and st03n workload performance
Is there anyone expert to analyze my problem and parameter and share his expereince to add or modify the below parameter which will boom the performance.
System:        DBSERVER1_PRD_02          Profile Parameters for SAP Buffers
Date and Time: 13.10.2007       11:49:53
Buffer Name                    Comment
Profile Parameter             Value      Unit  Comment
Program buffer                 PXA
abap/buffersize               400000     kB    Size of program buffer
abap/pxa                      shared           Program buffer mode
|
CUA buffer                     CUA
rsdb/cua/buffersize           10000      kB    Size of CUA buffer
The number of max. buffered CUA objects is always: size / (2 kB)
                                                                                |
Screen buffer                  PRES
zcsa/presentation_buffer_area 20000768   Byte  Size of screen buffer
sap/bufdir_entries            10000            Max. number of buffered screens
|
Generic key table buffer       TABL
zcsa/table_buffer_area        100000768  Byte  Size of generic key table buffer
zcsa/db_max_buftab            10000            Max. number of buffered objects
|
Single record table buffer     TABLP
rtbb/buffer_length            60000      kB    Size of single record table buffer
rtbb/max_tables               500              Max. number of buffered tables
|
Export/import buffer           EIBUF
rsdb/obj/buffersize           40000      kB    Size of export/import buffer
rsdb/obj/max_objects          20000            Max. number of objects in the buffer
rsdb/obj/large_object_size    8192       Bytes Estimation for the size of the largest object
rsdb/obj/mutex_n              0                Number of mutexes in Export/Import buffer
|
OTR buffer                     OTR
rsdb/otr/buffersize_kb        4096       kB    Size of OTR buffer
rsdb/otr/max_objects          2000             Max. number of objects in the buffer
rsdb/otr/mutex_n              0                Number of mutexes in OTR buffer
|
Exp/Imp SHM buffer             ESM
rsdb/esm/buffersize_kb        4096       kB    Size of exp/imp SHM buffer
rsdb/esm/max_objects          2000             Max. number of objects in the buffer
rsdb/esm/large_object_size    8192       Bytes Estimation for the size of the largest object
rsdb/esm/mutex_n              0                Number of mutexes in Exp/Imp SHM buffer
|
Table definition buffer        TTAB
rsdb/ntab/entrycount          29989            Max. number of table definitions buffered
The size of the TTAB is nearly 100 bytes * rsdb/ntab/entrycount
                                                                                |
Field description buffer       FTAB
rsdb/ntab/ftabsize            60004      kB    Size of field description buffer
rsdb/ntab/entrycount          29989            Max. number / 2 of table descriptions buffered
FTAB needs about 700 bytes per used entry
                                                                                |
Initial record buffer          IRBD
rsdb/ntab/irbdsize            8000       kB    Size of initial record buffer
rsdb/ntab/entrycount          29989            Max. number / 2 of initial records buffered
IRBD needs about 300 bytes per used entry
                                                                                |
Short nametab (NTAB)           SNTAB
rsdb/ntab/sntabsize           3000       kB    Size of short nametab
rsdb/ntab/entrycount          29989            Max. number / 2 of entries buffered
SNTAB needs about 150 bytes per used entry
                                                                                |
Calendar buffer                CALE
zcsa/calendar_area            500000     Byte  Size of calendar buffer
zcsa/calendar_ids             200              Max. number of directory entries
|
Roll, extended and heap memory EXTM
ztta/roll_area                3000320    Byte  Roll area per workprocess (total)
ztta/roll_first               1024       Byte  First amount of roll area used in a dialog WP
ztta/short_area               4000000    Byte  Short area per workprocess
rdisp/ROLL_SHM                32768      8 kB  Part of roll file in shared memory
rdisp/PG_SHM                  16384      8 kB  Part of paging file in shared memory
rdisp/PG_LOCAL                150        8 kB  Paging buffer per workprocess
em/initial_size_MB            5600       MB    Initial size of extended memory
em/blocksize_KB               4096       kB    Size of one extended memory block
em/address_space_MB           4096       MB    Address space reserved for ext. mem. (NT only)
ztta/roll_extension           2000000000 Byte  Max. extended mem. per session (external mode)
abap/heap_area_dia            2000000000 Byte  Max. heap memory for dialog workprocesses
abap/heap_area_nondia         0          Byte  Max. heap memory for non-dialog workprocesses
abap/heap_area_total          5872025600 Byte  Max. usable heap memory
abap/heaplimit                40000000   Byte  Workprocess restart limit of heap memory
abap/use_paging               1                Paging for flat tables used (1) or not (0)
|
Statistic parameters
rsdb/staton                   1                Statistic turned on (1) or off (0)
rsdb/stattime                 0                Times for statistic turned on (1) or off (0)
REgards
Anwer Waseem

Answer 1

Hi
Thanks to all of you sharing your experience.
I have been noticed that whenever our users are executing the cuztomized program via t-code or calling from sub-programs then the following counters values are increasing which are as follows:-
1) # Steps  ( number of dialague steps )
2) O Time   (Average response time / dialague step (ms))
3) O CPU~ (Average CPU time (ms) )
4) T DB Time (Total DB Time (s) )
5) O DB Time (Average DB Time per dialague steps (ms) )
Also, i am pasting the search result of  abap program which is reading the data from the specfic table without the index which are as follows:-
1)    READ TABLE I_TVKBZ WITH KEY VKBUR = MUGRP.
2)    READ TABLE I_TVKBZ WITH KEY VKBUR = MUGRP.
3)   read table I_VBPA with key vbeln = i_final1-vbeln
                              posnr = i_final1-posnr
                              parvw = 'VE' .
4)   read table I_VBPA with key vbeln = i_final1-vbeln
                              posnr = i_final1-posnr
                              parvw = 'WE' .
5)  READ TABLE i_ship with key kunnr = I_VBPA-kunnr.
6) READ TABLE I_FINAL INDEX RS_SELFIELD-TABINDEX.
7)   READ TABLE S_VKBUR INDEX 1.
Please advise us .
REgards
Anwer Waseem
SAP BASIS