Hi, when working on fixing the bug related to vacuum freeze, I found out that there is something called "MultiXactId".
Searching docs showed that it is mentioned only once, in release notes to 9.3.2: http://www.postgresql.org/search/?u=%2Fdocs%2F9.3%2F&q=multixactid What's more - I found that Peter Eisentraut already once asked about them, and lack of documentation: http://postgresql.1045698.n5.nabble.com/MultiXactId-concept-underdocumented-td5766754.html So, my question is - what are multixactids, what are they used for, where can I find any documentation/explanation/whatever? It seems to be related in some way to the relfrozenxid/vacuum bug, but I can't comprehend the relation without knowing what multixactid actually is. Best regards, depesz -- The best thing about modern society is how easy it is to avoid contact with it. http://depesz.com/
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