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What's MultiXactId? - Mailing list pgsql-hackers

From jacktby@gmail.com
Subject What's MultiXactId?
Date
Msg-id 202303032037474395722@gmail.com
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in src/include/access/htup_details.h, I find out this:
#define HEAP_XMAX_IS_MULTI 0x1000 /* t_xmax is a MultiXactId */
what's MultiXactId? Can you give me a scenario to make this bit as 1?
jacktby@gmail.com

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