LATEST VERSION: 5.21 - RELEASE NOTES
Cost-Based Vacuum Delay Parameters
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Cost-Based Vacuum Delay Parameters
Warning: Using cost-based vacuum delay is discouraged because it runs
asynchronously among the segment instances. The vacuum cost limit and delay is invoked at
the segment level without taking into account the state of the entire Greenplum
array.
You can configure the execution cost of VACUUM and ANALYZE commands to reduce the I/O impact on concurrent database activity. When the accumulated cost of I/O operations reaches the limit, the process performing the operation sleeps for a while, Then resets the counter and continues execution
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vacuum_cost_delay vacuum_cost_limit vacuum_cost_page_dirty |
vacuum_cost_page_hit vacuum_cost_page_miss |