On 7 June 2017 at 18:16, sanyam jain <sanyamjai...@live.in> wrote:
> Hi,
> Can someone explain the usage of exporting snapshot when a logical
> replication slot is created?

It's used to pg_dump the schema at a consistent point in history where
all xacts are known to be in the snapshot (and thus dumped) or known
not to be (so they'll be streamed out on the slot).

See snapbuild.c etc.

 Craig Ringer                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

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