On Tuesday 20 September 2005 13:55, Chris Hoover wrote:
> I have a question on disk access.
>
> How often is PostgreSQL accessing/touching the files that are on the hard
> drive?
>
> What I'm trying to ask is, is PostgreSQL constantly updating access
> timestamps or something like that on the database files even if they are
> not being queried? This questions comes from an Oracle background where
> Oracle was updating the individual files every 3 seconds if I am
> remembering correctly.
>
> I am trying to figure out besides the queries, what sort of accessing is
> PostgreSQL doing to my drives so we can try and resolve some i/o issues.
>
AFAIK unless your actually doing something,it wont access your data files at
all. Note that something is pretty wide here, insert/update/vacuum/analyze
and even select will cause file access but otherwise it wont.
--
Robert Treat
Build A Brighter Lamp :: Linux Apache {middleware} PostgreSQL