I have a scenario where we are doing an application release and they want to be 
able to potentially rollback to HA if things go bad. So the current process 
would be:


  1.  Run select pg_xlog_replay_pause(); on standby to pause replication
  2.  Apply changes
  3.  If team needs to revert to older version of cluster we would run pg_ctl 
promote

My question is, would pg_ctl prmote start up from the point where replication 
was paused or would it try and sync before it opens? Thus applying all the 
changes I am trying to prevent?

Thanks,
Brian

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