Re: Maximum Possible Insert Performance?

Tom Lane wrote:
> William Yu <wyu@talisys.com> writes:
> 
>>I then tried to put the WAL directory onto a ramdisk. I turned off 
>>swapping, created a tmpfs mount point and copied the pg_xlog directory 
>>over. Everything looked fine as far as I could tell but Postgres just 
>>panic'd with a "file permissions" error. Anybody have thoughts to why 
>>tmpfs would not work?
> 
> 
> I'd say you got the file or directory ownership or permissions wrong.

I did a mv instead of a cp which duplicates ownership & permissions exactly.