Type: integer
Default: 4096 (4MB)
Min: 64 (64kB)
Max: 2147483647 (2147483647kB)
Unit: KB
Context: user
Restart: false
Since: 9.5

Sets the maximum size of a GIN index's pending list, which is used when fastupdate is enabled. If the list grows larger than this maximum size, it is cleaned up by moving the entries in it to the index's main GIN data structure in bulk. If this value is specified without units, it is taken as kilobytes. The default is four megabytes (4MB). This setting can be overridden for individual GIN indexes by changing index storage parameters. See gin-fast-update and gin-tips for more information.


Unless you have a lot of GIN indexed data and have time to test the performance of fastupdate. Even then, it's probably better to set it on individual indexes.