Re: reducing statistics write overhead - Mailing list pgsql-hackers

From Magnus Hagander
Subject Re: reducing statistics write overhead
Date
Msg-id 48C52302.5020101@hagander.net
Whole thread Raw
In response to Re: reducing statistics write overhead  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
Tom Lane wrote:
> Magnus Hagander <magnus@hagander.net> writes:
>> Tom Lane wrote:
>>> I'd also be worried about issues like clock skew between the
>>> postmaster's time and the filesystem's time.
> 
>> Can that even happen on a local filesystem? I guess you could put the
>> file on NFS though, but that seems to be.. eh. sub-optimal.. in more
>> than one way..
> 
> Lots of people use NAS/SAN type setups.

For NAS it could happen, but certainly not for SAN, no? SANs have all
the filesystem processing in the kernel of the server...

I still agree that it's not a good thing to rely on, though :-)

//Magnus



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