how can i increase performance of my system

[Former Member]

Dear Experts ,

here i have some problems in my system

it seems very slow now i need to speed up my system performance

so please let me any suggessions on this

i checked in RZ20 buffer values

Program -> SpaceUsed --> 100%

Screen -->SpaceUsed -->99%

InitialRecords -->HitRatio -->47%

InitialRecords -->Swap -->106.5 /min ... these all are in red color

how can i Reset these buffer values ..

i already restarted my instance but system performnce is not much more increased

Regards

[Former Member · Accepted solution]

The values of these buffers are shown in transaction ST02. Check if you have many swaps on these buffers, if that's the case, you could consider increasing them..

Keep in mind that these ST02 buffers are only a small part of your overall system performance. In case you have serious performance issues, you have to check the entire landscape:

- SAP System

- Oracle

- Heavy SQL

- Network

- Operating system

- Storage system

- and so on....

Kind regards,

Mark

[Former Member · Accepted solution]

Hi mark,

thanks for your reply

my swaps Deatils

buffer Hit Rat Alloc.KB Free Sp Dir.size Free DirEnt %Free Dir Free Dir Swaps DB Accs

Field definition 93.02 32,504 2,271 7.57 32,000 26,579 83.06 22,069 29,368

Initial records 57.66 7,000 2,451 40.85 8,000 727 9.09 4,808 12,081

program 97.90 450,000 891 0.21 112,500 101,910 90.59 31,097 125,505

CUA 96.17 3,000 325 13.22 1,500 1,385 92.33 38,803 1,109

Screen 97.38 4,297 43 1.05 2,000 1,599 79.95 521 2,049

Export/import 68.27 4,096 1,171 34.70 2,000 1,495 74.75 65,343

Please Let me your suggesitions on my buffer values

Regards

[Former Member · Accepted solution]

You have do dive into this and share your conclusions with us... That's the only way you will learn how to approach performance issues in the future..

Kind regards,

Mark

[Former Member]

The performance issue raised by a user or multipe user and multipe site?

have you checked whats going on in SM50 (is your database doing sequential reads?)

Check for your IO wait for your database filesystem.

What DB and OS your SAP running?

[Former Member]

Dear Sunil,

in my database its going sequential read only

Aix and Oracle databse

i have one doubt

how can we check our network utility for sap servers

means i want to know how much sap servers utilizes ,,i think is their any problems in bandwidth

Regards

[Former Member]

Use ST06 and ST03N to narrow down the issue.

[Former Member]

ST02 --> increase the buffers which has more swaps

ST03n --> find the Bad Z* programs and tune it

DB02 --> check the buffer hits --> if it is less than 80% increase it