Fellow netters:
We have an ORACLE database running on a SUN box. The end users run
decision support type queries that take a long time to run, sometimes
lasting upto 30 hours. During these periods of times, we run load jobs that
load data into tables that the users may be querying. They may do updates,
inserts , and some deletes.
As a result, the queries bomb out with the wretched ORA-1555 error.
Snapshot too old, Rollback segment too small.
ORACLE support asked us to increase the size of the rollback segments.
Is there any way that we can make this error extremely unlikely to occur?
Can we have a dedicated rollback segment for each load job? Can we
make each of these rollback segments quite large so that the rollback
information stays in the rollback segment for a long time?
I would like to give higher priority to user queries rather than load jobs
because it it imperative that the queries complete rather than load jobs.
Is this possible in any way?
Thank you for your help. Any help regarding this 1555 problem is highly
appreciated.
