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BS0 Memory Overflow in Buffer Synchronization in SM21

Former Member
0 Kudos

Hi experts,

we are getting following error in sm21 logs."BS0 Memory Overflow in Buffer Synchronization"

log in the below. i check WP the trace file not get any thing. and read 565057 note.

Please proived me the Proper sol.

*SAP ECC 5.0 Oracle 10G on Linux.

*

******************************************************************************************************************************************************************************

Time     Instance             Ty. Nr  Cl. User         Tcod MNo Text

Date : 14.09.12

01:29:49 SAPECCDB            BTC 046 002 BHACCUSR            BS0 Memory Overflow in Buffer Synchronization

etails

ecording at local and central time........................ 14.09.2012 01:29:49

ask................ 26746  /  Background Processor No. 46

ser................ BHACCUSR           

lient.............. 002

erminal............

ession............. 1

ransaction code....

rogram name........ ZAU00006

roblem class....... K    SAP Web AS Problem

evelopment class... SBAC

odule name......... dbsync

ine................ 3761

able name..........

ield name..........

ocumentation for system log message BS 0 :

A memory overflow in the buffer synchronization

occurs in production systems extremely rarely. It is

usually caused by a transaction that has changed a large number

of buffered objects.

If an overflow occurs the affected buffers are reset on external

application servers. The possible causes of the overflow are

logged in the associated trace file. In most cases the cause is

buffered tables. You should consider whether these tables really

need to be buffered, that is whether the number of read accesses

far outweighs the number of write accesses. It may be best to shorten

the database transaction by using quicker, consecutive

COMMIT commands.

echnical details

ile................ 005827

osition............ 0000024840

ntry type.......... h      ( Database Error (Non-SQL)       )

essage ID.......... BS 0

ariable parts......                                                     dbsync  3761

***************************************************************************************************************************************************************************

Regards,

vivek

Accepted Solutions (0)

Answers (1)

Answers (1)

paul_power
Active Contributor
0 Kudos

Hi Vivek,

What type of tables are assoicated with the errors?

IF many of those tables are master data tables, you should consider
to debuffer them as outlined in note 803958.

   803958  Debuffering BW master data tables

Please see the following for more info:

SAP Note #550784  -  Changing the buffering of InfoObject tables

SAP Note #480710 - Maximum size of table buffers

Hope this is of help.

Best regards,

Paul

Former Member
0 Kudos

we found user data related USR02 ,USR10 etc...........

paul_power
Active Contributor
0 Kudos

Hi Vivek,

Thats very unusual, aside from BW tables I can only see a general note

565057 - Buffer synchronization

which indicates that the issue might occur if the mentioned tables are changed/updated very frequently within a single transaction. I would not expect this behaviour on tables USR02 ,USR10.

Do you know what programs/batch jobs triggered the SM21 error?

regards,

Paul

Former Member
0 Kudos

This is a ZProgram " ZAU00006".

Regards,

Vivek