Re: Reducing walreceiver latency with a latch

On 13 September 2010 12:40, Heikki Linnakangas
<heikki(dot)linnakangas(at)enterprisedb(dot)com> wrote:
> Now that we have the wonderful latch facility, let's use it to reduce the
> delay between receiving a piece of WAL and applying in the standby.
> Currently, the startup process polls every 100ms to see if new WAL has
> arrived, which adds an average a 50 ms delay between a transaction commit in
> the master and it appearing as committed in a hot standby server. The latch
> patch eliminated a similar polling delay in walsender already, the attached
> patch does the same for walreceiver.
>
> After this patch, there is no unnecessary delays in the streaming
> replication code path. Note that this is all still asynchronous, just with
> reduced latency.
>
> This is pretty straightforward, but any comments?

Is that supposed to be waiting 5000ms?

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Thom Brown
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