| From: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com> |
|---|---|
| To: | Stephen Frost <sfrost(at)snowman(dot)net> |
| Cc: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, Ryan Murphy <ryanfmurphy(at)gmail(dot)com>, Beena Emerson <memissemerson(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Re: Clarifying "server starting" messaging in pg_ctl start without --wait |
| Date: | 2017-01-19 14:59:37 |
| Message-ID: | 949077d5-0ede-d7b6-79d2-f428bc345628@2ndquadrant.com |
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| Lists: | pgsql-hackers |
On 1/19/17 9:53 AM, Stephen Frost wrote:
> Sure, but we're talking about replaying WAL vs. doing a checkpoint, not
> about writing WAL vs. replaying WAL. Replaying WAL and doing a
> checkpoint both require writing to lots of different places across the
> filesystem, of course.
Yeah, but they are each doing different things, so you can't say that
one will take the same amount of time or strictly less than the other.
It might be a good first estimation, but my practical experience is that
it's not when it really matters. :-/
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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