On 2016年03月09日 23:31, Andres Freund wrote:
Did you enable track_commit_timestamps in the server?
That's unrelated, commit ts is about an xid timestamp mapping.

Yes, whether enable track_commit_timestamp or not, I have just done the test again and the result is the same.

Thxs all!

Best regards!

*PostgreSQL DBA hailong.li of Qunar*

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