Re: New SQL RDBMS
From: Greg Gaughan <beta_at_thinksql.co.uk>
Date: Mon, 22 Jan 2001 23:12:23 -0000
Message-ID: <A43b6.13295$vH6.225755_at_news6-win.server.ntlworld.com>
Date: Mon, 22 Jan 2001 23:12:23 -0000
Message-ID: <A43b6.13295$vH6.225755_at_news6-win.server.ntlworld.com>
At the moment garbage collection blocks no one. It runs each time the server is re-started and removes tuples that are no longer accessible by any user. It will be made to run more regularly and could be made more aggressive without blocking users.
Andi Kleen <freitag_at_alancoxonachip.com> wrote in message
news:oupn1cogtz7.fsf_at_pigdrop.muc.suse.de...
> "Greg Gaughan" <beta_at_thinksql.co.uk> writes:
>
> > Multiversion concurrency control
> > - readers never block other users
> > - writers never block readers
> And whom does the required garbage collection block?
>
> -Andi
>
Received on Tue Jan 23 2001 - 00:12:23 CET