Re: [External] Re: standby replication server throws invalid memoryalloc request size , does not start up

> On Jun 28, 2018, at 9:47 AM, Vijaykumar Jain  wrote:
> 
> Thanks Scott.
> 
> fsync is on.
> 
> postgres=# show fsync;
> fsync
> -------
> on
> (1 row)
> 

Yeah, I agree with Scott; it sounds like fsync() is being shorted somewhere in the I/O path.  Are you using a RAID controller; if so is the cache setting — write through or write back?  If it’s write back then writes are being cached and a power outage will lead to data corruption — the only saving grace at that point would be the battery backup logic on the controller which may or nay not be trustworthy.