Re: PostgreSQL as a local in-memory cache

Robert Haas wrote:
> On Mon, Jun 28, 2010 at 5:57 PM, Bruce Momjian <bruce@momjian.us> wrote:
> >> The patch also documents that synchronous_commit = false has
> >> potential committed transaction loss from a database crash (as well as
> >> an OS crash).
>
> Is this actually true?

I asked on IRC and was told it is true, and looking at the C code it
looks true.  What synchronous_commit = false does is to delay writing
the wal buffers to disk and fsyncing them, not just fsync, which is
where the commit loss due to db process crash comes from.

--
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + None of us is going to be here forever. +