ORA-1555 after switchover to standby

This week started with diagnosing an interesting situation that didn’t seem to be talked about much (maybe because it is a relatively “old” problem–explanation in a minute), so I thought I’d share the experience for everyone’s benefit.

The situation involves a (<gasp>) database on Linux 32-bit RHEL 4. The database is in flashback mode and has a single physical standby database with Data Guard configured in maximum availability mode. The standby was configured relatively recently and had never been tested with a switchover. The switchover was scheduled and conducted without much issue. Continue reading “ORA-1555 after switchover to standby”