| From: | Greg Stark <gsstark(at)mit(dot)edu> |
|---|---|
| To: | Kelly Burkhart <kelly(dot)burkhart(at)gmail(dot)com> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: synchronous_commit and mvcc |
| Date: | 2009-08-12 19:35:51 |
| Message-ID: | 407d949e0908121235m228de482ib4bef3095a2c66d7@mail.gmail.com |
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| Lists: | pgsql-general |
On Wed, Aug 12, 2009 at 8:28 PM, Kelly Burkhart<kelly(dot)burkhart(at)gmail(dot)com> wrote:
> Hello,
>
> We have synchronous_commit=off in our postgresql.conf file. Does this
> setting affect mvcc?
If you don't have a crash then there is absolutely no difference from
the clients' point of view (besides speed).
If you have a crash you could lose the last 200ms of commits but if
that happens you'll lose them in a "consistent" way. You can't find
the results of one transaction committed afterwards but not some other
transaction which came earlier.
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