Performance parameter change with doubling the RAM

[Former Member]

Hi Gurus,

We were working on 8 GB of RAM.

Now we have upgraded it to 16 Gb ,can someone please update the SAP parameter that needs to be changed in the instance profile and the oracle parameter in the initsid.ora file.

Please reply ASAP.

Thanks and regards

Tushar Pathak

[Former Member]

Hi

Its windows 32 bit 4.7 non unicode system.

please find below the instance profile

ztta/roll_extension 120000000

abap/heap_area_total 1200000000

enque/table_size 60000

gw/max_sys 2000

gw/max_overflow_size 100000000

rdisp/max_comm_entries 2000

abap/heap_area_nondia 582146816

abap/heap_area_dia 526853216

rdisp/tm_max_no 2000

gw/max_conn 2000

rsdb/min_in_blocking_factor 5

rsdb/max_in_blocking_factor 5

sap/bufdir_entries 10000

zcsa/presentation_buffer_area 32000000

zcsa/db_max_buftab 10000

zcsa/table_buffer_area 80000000

rdisp/wp_no_spo_Fro_max 2

rsdb/cua/buffersize 8000

login/min_password_lng 3

rdisp/max_arq 2000

rtbb/buffer_length 39000

rsdb/ntab/irbdsize 12000

rsdb/ntab/ftabsize 77000

rsdb/ntab/entrycount 30000

gw/netstat_once 0

rdisp/ROLL_SHM 32768

rsdb/obj/max_objects 32000

rsdb/obj/buffersize 320000

rdisp/max_wprun_time 900

login/password_expiration_time 300

abap/buffersize

600000

rdisp/gui_auto_logout 900

login/system_client 087

SAPSYSTEMNAME OMP

INSTANCE_NAME DVEBMGS00

SAPSYSTEM 00

rdisp/wp_no_dia 15

login/no_automatic_user_sapstar 0

rdisp/wp_no_btc 4

rdisp/wp_no_vb 3

rdisp/wp_no_vb2 2

rdisp/wp_no_enq 1

rdisp/wp_no_spo 3

SAPGLOBALHOST SAPOMP

PHYS_MEMSIZE 2700

DIR_TRANS F:\usr\sap\trans

icm/server_port_0 PROT=HTTP,PORT=8000,EXTBIND=1

DIR_ORAHOME E:\ORACLE\OMP\920

SAPLOCALHOST SAPOMP

SAPLOCALHOSTFULL SAPOMP

rdisp/wp_auto_restart 864

ztta/roll_area 12000000

Thanks and regards

Tushar Pathak

[Former Member]

Hello,

let's assume that you're running a central instance with the DB on the same machine.

On Windows usually you don't need to change the SAP parameters as 'Zero Administration Management' is used. If you want the SAP system to allocate more memory at system start you may increase parameter PHYS_MEMSIZE. See also https://service.sap.com/sap/support/notes/88416

Other tuning option is to increase the SAP buffers if you see many swaps in ST02. There are many different parameters and it's not possible to make recommendations here without having a deeper look into your system.This also applies to DB tuning. You can check the settings/performance in ST04 and may consider to increase some areas like data buffer, shared pool, ...

Regards

Juergen

[Former Member]

Hi Tushar,

It's 32bit...right.

So in case of Windows OS, set the 3GB option so that the application part will

get the desired memory(may go till 2.7GB). If your H/W is 64bit architecture, so

why don't you go for 64bit kernel as well so that there won't be any degrade in system performance.

Suggest to check SAP Note 110172 and http://support.microsoft.com/kb/283037

SAP provides EarlyWatch and GoLive Services, so why dont you book one service for a system performance check, it will definitely help you.

SV-BO-REQ is the component for booking this services.

Let me know incase any conusions.

Tilak

[Former Member]

Just to second Tilak, if your hardware supports 64 bit go 64 bit. It makes memory management so much easier in SAP.

[Former Member]

We also need information about

- Kernel-Version

- OS-Version

- Your actual Parameter-Settings (RZ10, RSPARAM)

[Former Member]

Hi,

What is the OS ?

K

[Former Member]

hi pathak,

I think you need to observe performance of your system first for couple days before changing some parameter.

You need to make sure that you have enough free physical memory (using ST06). If you don have some free physical memory than you can consider changing memory parameter on database level and/or SAP level.

You could also paste your current parameter here so we can analyze together if you want some help here.

ardhian

http://ardhian.kioslinux.com

http://sapbasis.wordpress.com