Tag: timestamp

How about that gg_heartbeat_history table?

How about that gg_heartbeat_history table?

Heartbeat tables are used to monitor the lag throughout the data replication cycle. Automatic heartbeats are sent periodically from each source database into the replication streams. These heartbeat records are inserted or updated into the heartbeat table at the target databases. By comparing the timestamps of these heartbeat records, the current and historical lags in … Continue reading How about that gg_heartbeat_history table? →

DBA_HIST_DATABASE_INSTANCE

In 10g there is a view called DBA_HIST_DATABASE_INSTANCE which has database instance information. It has history on information such as instance startup time, last ASH sample id. Example: SQL> column startup_time format a35 SQL> alter session set nls_timestamp_format='DD-MON-YYYY HH24:MI:SS'; Session altered. SQL> SELECT startup_time, last_ash_sample_id FROM dba_hist_database_instance WHERE dbid = 1992878807 order by startup_time; STARTUP_TIME … Continue reading DBA_HIST_DATABASE_INSTANCE →