ST02 / ST03 Troubleshooting

[Former Member]

Dear Experts,

do you have any guidline or checklist on what to do if there are swaps problems on ST02 or Response Time Problems on ST03?

Thanks a lot for any help!

Regards,

Marc

[Former Member · Accepted solution]

Hi,

Go through following links for ST02 & ST03 in sap help portal. it will give you fair idea of memnory management and work load analysis.

http://help.sap.com/saphelp_nw70/helpdata/EN/02/96263e538111d1891b0000e8322f96/content.htm

http://help.sap.com/saphelp_nw70/helpdata/EN/95/8a393c3ab01224e10000000a11405a/content.htm

Regards,

Sachin Rane.

[Former Member]

Hi,

Refer following notes.

948066 Performance Analysis: Transactions to use

1250278 Low "Hit Ratio" for "Initial Records" buffer

( this note explains what all to look generally use that as base and analyse ur swaps)

In Buffer there are basically two things

1. Buffer Space

2. Directory entries

Monitor the both usage, and the free available space and free directory entries and one more thing u have to see is database requests.

Based on this u can decide how much you have to increase the space or directory entries.

take an average data for atleast 5 days. and if any system restart please check for more days to get accurate value.

Let me know for any more details....

Thanks & Regards,

Balaji.S

[Former Member]

Hi,

I will strongly recomend to use an Early Watch Service from SAP for tuning your system because this is not an easy thing to do if you do not have the proper knowledge or if you want to learn and are not in a hurry then look for every note available regarding recomended parameter settings and read around all the links already posted here to learn more about tuning.

For example, if you find swaps in ST02 it does not necesarily means that there is a problem with buffers because swaps are cumulative so if you bounce the Application then you will probably find that swaps are too few to worry about and there are some SAP notes that tells you this.

Good luck

[Former Member]

Hi

Adding more check this below link too

http://help.sap.com/saphelp_nw70/helpdata/EN/c4/3a6dbb505211d189550000e829fbbd/frameset.htm

Regards

Uday

[Former Member]

Hi Marc,

Swaping happens if the data is not availabel in various buffers as it needs to access the database for the rquired data. there are various parameters which needs to be taken care of. Please check the values of the parameters if required finetune them.

Program:abap/buffersize

GenericKey:zcsa/table_buffer_area Bytes

Entries: zcsa/db_max_buftab

SingleRecord Size: rtbb/buffer_length

Screen:zcsa/presentation_buffer_area Bytes

CUA rsdb/cua/buffersize

Table Definition Size is determined by the number of entries

Entries: rsdb/ntab/entrycount

Field Description Size: rsdb/ntab/ftabsize

Entries: 2 * rsdb/ntab/entrycount + 1

Initial Records

Size: rsdb/ntab/irbdsize

Entries: 2 * rsdb/ntab/entrycount + 1

ShortNameTAB

Size: rsdb/ntab/sntabsize

ST03 performance problem

Check which component (CPU/Dialog/Batch etc) is taking more time and then you have take appropriate actions

1) I would suggest to Investigate the select statements more closely. Discover which tables and indexes they are using transaction ST04 > detailed analysis tab. if index are not there consider creating indexes.

2) Execute / check update statistics.

3)find the ZTcodes and Zprograms which are taking more time and you have to work with ABAP and Fuctional teams to stream line the programs and Tcodes.

Thank you,

Shyam