Chris Campbell wrote:
> On Jan 19, 2006, at 06:51, Magnus Hagander wrote:
>
> >In most cases you're going to see extremely few reads compared to
> >writes
> >on pg_stats, right? So why not have the backends connect to the stats
> >process (or perhaps use UDP, or use the pipe, or whatever) and
> >fetch the
> >data when needed. So when nobody fetches any data, there is no
> >overhead
> >(except for the stats process adding up values, of course).
>
> Do the stats need to persist across postmaster restarts (or crashes)?
After a crash we forcibly _delete_ the stat file. OTOH, on clean
shutdown it would be quite possible to write it (which would be the only
time at which the file is written).
--
Alvaro Herrera http://www.advogato.org/person/alvherre
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