I had the same problem and fixed it by setting a flashback_time. Partial script below, but you can get the idea. today=`date +%F` time=`date +%T` fb_time=FLASHBACK_TIME=\""TO_TIMESTAMP('$today $time','YYYY-MM-DD HH24:MI:SS')"\" sleep 30 expdp $connectString schemas=$schemaList dumpfile=$fileName logfile=$logName job_name=$jobName parallel=$parallel directory=$directory $fb_time > From: janine@xxxxxxxxxx > Subject: ORA-1555 error with AUM already enabled > Date: Tue, 25 May 2010 15:22:24 -0700 > To: oracle-l@xxxxxxxxxxxxx > > A full export of my database takes far longer on AWS than it does on my old > Linux server (30 minutes vs 2+ hours). During the export, I receive the > following error: > > EXP-00056: ORACLE error 1555 encountered > ORA-01555: snapshot too old: rollback segment number 1 with name > "_SYSSMU1_3780397527$" too small > > I checked the parameters that control automatic undo management and found > them to be set correctly: > > SQL> show parameter undo > > NAME TYPE VALUE > ------------------------------------ ----------- > ------------------------------ > undo_management string AUTO > undo_retention integer 900 > undo_tablespace string UNDOTBS1 > > > I tried running the export again, to see whether Oracle would have > automatically adjusted something to fix the problem, but it failed again. > > Is this just one of those freak cases where circumstances have psyched out > the automatic feature, or is there something I can do to fix it, beyond > whatever the manager is doing? Clearly the immediate problem is that my > rollback segments are too small, but since Oracle is managing them I hesitate > to go make them bigger myself. The longer range issue is the slow performance > of the virtual disk drives, which is something I haven't delved into yet. > > thanks, > > janine > > -- > //www.freelists.org/webpage/oracle-l > > _________________________________________________________________ The New Busy is not the too busy. Combine all your e-mail accounts with Hotmail. http://www.windowslive.com/campaign/thenewbusy?tile=multiaccount&ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_4