Re: pgsql: Use a latch to make startup process wake up and replay - Mailing list pgsql-committers

From Fujii Masao
Subject Re: pgsql: Use a latch to make startup process wake up and replay
Date
Msg-id AANLkTin-Gm9MB3N1T=CgyQ+BbY9Dx=u3-OUuietwvARN@mail.gmail.com
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In response to pgsql: Use a latch to make startup process wake up and replay  (heikki@postgresql.org (Heikki Linnakangas))
Responses Re: pgsql: Use a latch to make startup process wake up and replay  (Simon Riggs <simon@2ndQuadrant.com>)
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On Wed, Sep 15, 2010 at 7:35 PM, Heikki Linnakangas
<heikki@postgresql.org> wrote:
> Log Message:
> -----------
> Use a latch to make startup process wake up and replay immediately when
> new WAL arrives via streaming replication. This reduces the latency, and
> also allows us to use a longer polling interval, which is good for energy
> efficiency.
>
> We still need to poll to check for the appearance of a trigger file, but
> the interval is now 5 seconds (instead of 100ms), like when waiting for
> a new WAL segment to appear in WAL archive.

Good work!

+     /*
+      * Take ownership of the wakup latch if we're going to sleep during
+      * recovery.
+      */

I found a typo: s/wakup/wakeup/

Regards,

--
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center

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