GS_NODE_STAT_RESET_TIME

GS_NODE_STAT_RESET_TIME provides the statistics reset time of the current node and returns a timestamp with the time zone.

For details, see the get_node_stat_reset_time() function in "Functions and Operators" > "System Administration Functions" > "Other Functions" in the Data Warehouse Service (DWS) SQL Syntax Reference.

When an instance is running, its statistics keep rising. In the following cases, the statistical values in the memory will be reset to 0:

• The instance is restarted or a cluster switchover occurs.
• The database is dropped.
• A reset operation is performed. For example, the statistics counter in the database is reset using the pgstat_recv_resetcounter function or the Unique SQL statements are cleared using the reset_instr_unique_sql function.

If any of the preceding events occurs, DWS will record the time when the statistics are reset. You can query the time using the get_node_stat_reset_time function.