GLOBAL_GET_BGWRITER_STATUS

GLOBAL_GET_BGWRITER_STATUS displays the information about pages flushed by the bgwriter threads of all instances in the database, number of pages in the candidate buffer chain, and buffer eviction information.

Table 1 GLOBAL_GET_BGWRITER_STATUS columns

Name	Type	Description
node_name	text	Node name
bgwr_actual_flush_total_num	bigint	Total number of dirty pages flushed by the bgwriter thread from the startup time to the current time
bgwr_last_flush_num	integer	Number of dirty pages flushed by the bgwriter thread in the previous batch
candidate_slots	integer	Number of pages in the current candidate buffer chain.
get_buffer_from_list	bigint	Number of times that pages are obtained from the candidate buffer chain during buffer eviction.
get_buffer_clock_sweep	bigint	Number of times that pages are obtained from the original eviction solution during buffer eviction.