ORA-1555 reported inspite of high undo_retention and enough UNDO space.

(Doc ID 1574714.1)

Last updated on JULY 13, 2018

Applies to:

Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.


ORA-1555 is being reported inspite of high values set for the undo_retention and enough space in the UNDO tablespace.

o setting "_smu_debug_mode" = 33554432 didn't help.
o Tried many settings for UNDO_RETENTION, also didn't work.


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