Re: unlogged tables vs. GIST

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От
Heikki Linnakangas
Тема
Re: unlogged tables vs. GIST
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4D0BBEAA.7010008@enterprisedb.com
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unlogged tables vs. GIST Robert Haas <robertmhaas@gmail.com>
Re: unlogged tables vs. GIST Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>
Re: unlogged tables vs. GIST Robert Haas <robertmhaas@gmail.com>
Re: unlogged tables vs. GIST Tom Lane <tgl@sss.pgh.pa.us>
Re: unlogged tables vs. GIST Robert Haas <robertmhaas@gmail.com>
Re: unlogged tables vs. GIST Robert Haas <robertmhaas@gmail.com>
Re: unlogged tables vs. GIST Tom Lane <tgl@sss.pgh.pa.us>
Re: unlogged tables vs. GIST Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>
Re: unlogged tables vs. GIST Tom Lane <tgl@sss.pgh.pa.us>
Re: unlogged tables vs. GIST Robert Haas <robertmhaas@gmail.com>
Re: unlogged tables vs. GIST Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>
Re: unlogged tables vs. GIST Tom Lane <tgl@sss.pgh.pa.us>
Re: unlogged tables vs. GIST Robert Haas <robertmhaas@gmail.com>
Re: unlogged tables vs. GIST Tom Lane <tgl@sss.pgh.pa.us>
Re: unlogged tables vs. GIST Robert Haas <robertmhaas@gmail.com>
Re: unlogged tables vs. GIST Tom Lane <tgl@sss.pgh.pa.us>
Re: unlogged tables vs. GIST Tom Lane <tgl@sss.pgh.pa.us>
Re: unlogged tables vs. GIST Robert Haas <robertmhaas@gmail.com>
Re: unlogged tables vs. GIST Jeevan Chalke <jeevan.chalke@enterprisedb.com>
Re: unlogged tables vs. GIST Heikki Linnakangas <hlinnakangas@vmware.com>
Re: unlogged tables vs. GIST Robert Haas <robertmhaas@gmail.com>
Re: unlogged tables vs. GIST Tom Lane <tgl@sss.pgh.pa.us>
Re: unlogged tables vs. GIST Heikki Linnakangas <hlinnakangas@vmware.com>
Re: unlogged tables vs. GIST Andres Freund <andres@2ndquadrant.com>
Re: unlogged tables vs. GIST Robert Haas <robertmhaas@gmail.com>
Re: unlogged tables vs. GIST Tom Lane <tgl@sss.pgh.pa.us>
Re: unlogged tables vs. GIST Robert Haas <robertmhaas@gmail.com>
Re: unlogged tables vs. GIST Jeevan Chalke <jeevan.chalke@enterprisedb.com>
Re: unlogged tables vs. GIST Robert Haas <robertmhaas@gmail.com>
Re: unlogged tables vs. GIST Heikki Linnakangas <hlinnakangas@vmware.com>
Re: unlogged tables vs. GIST Robert Haas <robertmhaas@gmail.com>
Re: unlogged tables vs. GIST Jeevan Chalke <jeevan.chalke@enterprisedb.com>
Re: unlogged tables vs. GIST Jeevan Chalke <jeevan.chalke@enterprisedb.com>
Re: unlogged tables vs. GIST Heikki Linnakangas <hlinnakangas@vmware.com>
Re: unlogged tables vs. GIST Jeevan Chalke <jeevan.chalke@enterprisedb.com>
Re: unlogged tables vs. GIST Robert Haas <robertmhaas@gmail.com>
Re: unlogged tables vs. GIST Heikki Linnakangas <hlinnakangas@vmware.com>
Re: unlogged tables vs. GIST Robert Haas <robertmhaas@gmail.com>
Re: unlogged tables vs. GIST Tom Lane <tgl@sss.pgh.pa.us>
Re: unlogged tables vs. GIST Robert Haas <robertmhaas@gmail.com>
Re: unlogged tables vs. GIST Andy Colson <andy@squeakycode.net>
On 17.12.2010 21:32, Robert Haas wrote:
> I guess the question is whether it's right to conflate "table is
> unlogged" with "LSN is fake".  It's not immediately obvious to me that
> those concepts are isomorphic, although though the reverse isn't
> obvious to me either.

The buffer manager only needs to know if it has to flush the WAL before 
writing the page to disk. The flag just means that the buffer manager 
never needs to do that for this buffer. You're still free to store a 
real LSN there if you want to, it just won't cause any WAL flushes.

--   Heikki Linnakangas  EnterpriseDB   http://www.enterprisedb.com

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