ORA-01555: snapshot too old: rollback segment number <i>st...

ORA-01555:	snapshot too old: rollback segment number string with name "string" too small
Cause:	rollback records needed by a reader for consistent read are overwritten by other writers
Action:	If in Automatic Undo Management mode, increase undo_retention setting. Otherwise, use larger rollback segments

	Subject	Replies
1.	RBS not using	5
2.	Dubious 1555	5
3.	Snapshot too old	4
4.	ORA-1555	4
5.	INSERT versus CTAS	3
6.	How to find out the original SQL resulted the E...	3
7.	SQL Tuning -- large, long-running outer join query	3
8.	** export excluding some tables	3
9.	undo tablespace did not release space??	3
10.	UNDO poll - was undo segments vs. rbs	3
11.	oracle linux	3
12.	(no subject)	3
13.	Setting event 1555	2
14.	query slow in 9i, but not slow in 8i	2
15.	(no subject)	2
16.	To set events or not set events, that is the qu...	2
17.	To set events or not set events, that is the qu...	2
18.	Tbs READ ONLY and Snapshot too old	2
19.	fetch across commit	1
20.	fetch across commit	1
21.	fetch across commit	1
22.	fetch across commit	1
23.	is it possible in pl/sql?	1
24.	"snapshot too old" and undo_retention	1
25.	How to find out the original SQL resulted the E...	1
26.	automatic undo mysteries	1
27.	ORA-01555: snapshot too old: rollback segment n...	1
28.	ORA-01555: snapshot too old: rollback segment n...	1
29.	query slow in 9i, but not slow in 8i	1
30.	Strange snapshot too old during a select statement	1