Обсуждение: 回复：Re: Performance Issue when using gin index

"谭忠涛" <zhongtao.tan@seaboxdata.com> writes:
> The performance of creating a gin index before inserting data is different from that of inserting data after creating a gin index.

This isn't terribly surprising.  Read

https://www.postgresql.org/docs/current/gin.html#GIN-FAST-UPDATE

There's also useful info in

https://www.postgresql.org/docs/current/gin.html#GIN-TIPS

regards, tom lane