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Former Member
Feb 21, 2009 at 09:09 AM

SAP buffer (Transaction code ST02) performance - A lot of swapping

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Dear Consultant,

I am monitoring my system landscape and find that the the output of ST02 is

showing alot of swapping. I have gone thru some of SAP notes and conclude that

below parameters to be modified.

Please suggest does this solve my problem or some of the more parameters need to

be modified. The parameters & error screen shot is attached.

Buffer HitRatio % Alloc. KB Freesp. KB % Free Sp. Dir. Size FreeDirEnt % Free Dir Swaps DB Accs

Nametab (NTAB) 0

Table definition 91,68 6.796 19.990 6.648.863 24.366.289

Field definition 99,24 31.564 2.110 7,03 19.990 14.499 72,53 1.373.058 1.381.202

Short NTAB 99,99 3.625 1.709 56,97 4.997 472 9,45 1.072 5.739

Initial records 58,61 6.625 879 14,65 4.997 197 3,94 807.130 812.034

0

program 99,20 350.000 954 0,28 87.500 77.927 89,06 2.542.779 7.685.097

CUA 98,49 3.000 354 14,83 1.500 1.381 92,07 4.117.203 116.416

Screen 98,94 4.297 968 23,65 2.000 1.819 90,95 24.683 136.963

Calendar 99,98 488 366 76,57 200 48 24,00 0 302

OTR 80,43 4.096 3.279 99,94 2.000 1.991 99,55 0

0

Tables 0

Generic Key 98,94 29.297 1.623 5,85 5.000 794 15,88 34.078 23.610.875

Single record 92,89 10.000 311 3,17 500 439 87,80 15.192 15.738.209

0

Export/import 77,96 4.096 48 1,46 2.000 1.160 58,00 23.390.536

Exp./ Imp. SHM 97,06 4.096 3.085 94,03 2.000 1.999 99,95 0

======================================================================================================================

No of CPU 8

RAM 68 - GB

Operating System Sun Solaris 5.10

No of Users 286

Concurrent Users 125

SAP Version ECC60

Database Oracle 10.2.0.2

SAP Support Package level ABAP : 14 , BASIS : 14 & APPL : 11

SAP Kernel 700_REL

SAP Kernel Patch no 144

Buffer Settings

Parameters Current value Recommended value

abap/buffersize 350000 400000

rsdb/ntab/entrycount 19990 30000

rtbb/buffer_length 10000 20000

rsdb/cua/buffersize 3000 4000

zcsa/table_buffer_area 30000128 50000000

zcsa/db_max_buftab 5000 6000

zcsa/presentation_buffer_area 4400128 8000000

sap/bufdir_entries 2000 3000

rsdb/obj/buffersize 4096 8192

rsdb/obj/max_objects 2000 3000

rsdb/ntab/ftabsize 60001

rsdb/ntab/irbdsize 60001

rsdb/ntab/sntabsize 60001

Memory Management

Parameters Current value Recommended value

em/global_area_MB 255

ztta/roll_area 3000320 4000000

rdisp/PG_SHM 8192 8192

Regards

Vimal