Hi
On Wed, Dec 17, 2014 at 2:39 PM, Alvaro Herrera
<alvherre@2ndquadrant.com> wrote:
> didier wrote:
>
>> On many Linux systems it may not do that much (2.6.32 and 3.2 are bad,
>> 3.13 is better but still it slows the fsync).
>>
>> If there's a fsync in progress WALReceiver will:
>> 1- slow the fsync because its writes to the same file are grabbed by the fsync
>> 2- stall until the end of fsync.
>
> Is this behavior filesystem-dependent?
I don't know. I only tested ext4
Attach the trivial code I used, there's a lot of junk in it.
Didier