Обсуждение: What's MultiXactId?

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What's MultiXactId?

От
"jacktby@gmail.com"
Дата:
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