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I see from ps that:

postgres: wal sender process replicator X.X.X.X(38681) streaming 0/17AF5438

But is there any way for me to know whether it is synchronous or asynchronous? I made the relevant changes in postgresql.conf to switch from synchronous to asynchronous and restarted the postgres service, but I wanted to double check that the changes were parsed correctly and I am in fact running asynchronously.

2

If:

SHOW synchronous_standby_names;

on the master that's expected to have synchronous replicas reports a non-empty value, then synchronous replication is active.

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  • Not being at all familiar with streaming replication, I presume you mean to execute this query on the primary -- or do(es) the slave(s) "know" the same? Jun 3 '14 at 12:30

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