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From: Tom Lane <tgl@sss.pgh.pa.us>
To: 谭忠涛 <zhongtao.tan@seaboxdata.com>
Cc: pgsql-bugs <pgsql-bugs@lists.postgresql.org>
Subject: Re: Performance Issue when using gin index
Date: Mon, 20 Jan 2025 22:01:40 -0500
Message-ID: <3265439.1737428500@sss.pgh.pa.us> (raw)
In-Reply-To: <tencent_7773A0055A04795D1E3DB6E3@qq.com>
References: <tencent_7773A0055A04795D1E3DB6E3@qq.com>

"=?utf-8?B?6LCt5b+g5rab?=" <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





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