On 4/18/17 22:13, Petr Jelinek wrote:
> So my idea was to add some kind of inuse flag. This turned out to be bit
> more complicated in terms of how to clean it than I would have hoped.
> This is due to the fact that there is no way to reliably tell if worker
> has failed to start if the parent worker crashed while waiting.
> My solution to that is to use similar logic to autovacuum where we use
> timeout for worker to attach to shmem. We do this only if there is no
> free slot found when launch of replication worker was requested.

It looks like launch_time is never set the current time in your patch.

Peter Eisentraut              http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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