| Lists: | pgsql-committerspgsql-hackers |
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| From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
|---|---|
| To: | pgsql-committers(at)postgresql(dot)org |
| Subject: | pgsql: Update docs to say you need fsync to make sync rep work fast. |
| Date: | 2011-03-22 16:37:49 |
| Message-ID: | E1Q24ab-0001FH-Jd@gemulon.postgresql.org |
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| Lists: | pgsql-committers pgsql-hackers |
Update docs to say you need fsync to make sync rep work fast.
Branch
------
master
Details
-------
http://git.postgresql.org/pg/commitdiff/6e8e7cc580665ddd43c8ca2acc6d60f345570a57
Modified Files
--------------
doc/src/sgml/high-availability.sgml | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
| Cc: | PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org> |
| Subject: | Re: [COMMITTERS] pgsql: Update docs to say you need fsync to make sync rep work fast. |
| Date: | 2011-04-30 16:30:51 |
| Message-ID: | 201104301630.p3UGUp905642@momjian.us |
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| Lists: | pgsql-committers pgsql-hackers |
Simon Riggs wrote:
> Update docs to say you need fsync to make sync rep work fast.
>
> Branch
> ------
> master
>
> Details
> -------
> http://git.postgresql.org/pg/commitdiff/6e8e7cc580665ddd43c8ca2acc6d60f345570a57
This patch added this documentation text:
+ Replies are only sent when WAL is written to disk, so setting
+ <varname>fsync</> to <literal>off</> on the standby will significantly
+ reduce performance of synchronous replication and should be avoided.
Should we also issue a warning message in the server logs for the use of
fsync=off on the standby?
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ It's impossible for everything to be true. +
| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Bruce Momjian <bruce(at)momjian(dot)us> |
| Cc: | Simon Riggs <simon(at)2ndQuadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Re: [COMMITTERS] pgsql: Update docs to say you need fsync to make sync rep work fast. |
| Date: | 2011-04-30 17:39:37 |
| Message-ID: | 642.1304185177@sss.pgh.pa.us |
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| Lists: | pgsql-committers pgsql-hackers |
Bruce Momjian <bruce(at)momjian(dot)us> writes:
> Simon Riggs wrote:
>> Update docs to say you need fsync to make sync rep work fast.
> Should we also issue a warning message in the server logs for the use of
> fsync=off on the standby?
That patch was entirely wrong and has been reverted.
regards, tom lane