Re: Proposal for 9.1: WAL streaming from WAL buffers - Mailing list pgsql-hackers

On 6/15/10 5:09 PM, Josh Berkus wrote:
>> > In 9.0, I think we can fix this problem by (1) only streaming WAL that
>> > has been fsync'd and 
> 
> I don't think this is the best solution; it would be a noticeable
> performance penalty on replication. 

Actually, there's an even bigger reason not to mandate waiting for
fsync: what if the user turns fsync off?

One can certainly imagine users choosing to rely on their replication
slaves for crash recovery instead of fsync.

--                                  -- Josh Berkus                                    PostgreSQL Experts Inc.
                        http://www.pgexperts.com