Trimakasih pak Andrew atas masukannya. Dalam hal ini yg diset di init.ora 
undo_management=AUTO dan undo_retention=3600 apakah undo_retention perlu 
dibesarkan lgi misalkan menjadi undo_retention=7200 dan klo diperbesar ada efek 
sampingnya ga...?
trimakasih atas bantuannya.
 
thx
 
Bambang

"Andrew E.K." <[EMAIL PROTECTED]> wrote:
Ini saya ambil dari documentation:

Cause: Rollback records needed by a reader for
consistent read are overwritten by other writers.

Action: If in Automatic Undo Management mode, increase
the setting of UNDO_RETENTION. Otherwise, use larger
rollback segments.

Value pada Undo_retention(detik) dapat disesuaikan
keperluan, seberapa lama transaksi disimpan pada undo
segment sebelum di overwrite transakasi lain. Jika
untuk transaksi yang cukup panjang anda bisa
memperbesar rollback segment anda (tablespace UNDOTBS
jika default) agar memiliki cukup space transaksi yang
sedang berlangsung.
Semoga membantu :)


Andrew

--- Bambang Irianto <[EMAIL PROTECTED]> wrote:

> Pada waktu mau close accounting periode di inventory
> pada oracle apps 11.5.9 and db 9.2.0 terjadi error
> 'CSTACPCS:20ORA-01555: snapshot too old: rollback
> segment number 2 with name "_SYSSMU2$" too small'.
> Mau tanya nih kira2 ada yg pernah ngalami seperti
> itu and klo ada solusinya boleh dong di share. Atas
> perhatiannya terimakasih.
>  
> Thx
>  
> Bambang
> 
> 
> 
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