Horton

Re: advancing snapshot's xmin

Dimitri Fontaine <dfontaine@hi-media.com>

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From: Dimitri Fontaine <dfontaine@hi-media.com>
To: pgsql-hackers@postgresql.org
Cc: Tom Lane <tgl@sss.pgh.pa.us>, "Heikki Linnakangas" <heikki@enterprisedb.com>, "Neil Conway" <neilc@samurai.com>, "Alvaro Herrera" <alvherre@commandprompt.com>
Date: 2008-03-26T08:33:27Z
Lists: pgsql-hackers 
Le mercredi 26 mars 2008, Tom Lane a écrit :
> whenever the number of active snapshots goes to zero

Does this ever happen?
I mean, if the way to avoid locking contention is to rely on a production 
system which let the service "breathe" from time to time, maybe there's 
something wrong in the reasoning.

Of course I'm much more ready to accept I don't understand the first bit of it 
all than to consider you're off-tracks here, but...
-- 
dim

If you ask a stupid question, you may feel stupid. If you don’t ask a stupid 
question, you remain stupid.
    -- Tony Rothman, Ph.D.U. Chicago, Physics