From: | Leonardo Francalanci <m_lists(at)yahoo(dot)it> |
---|---|
To: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: Fast insertion indexes: why no developments |
Date: | 2013-10-30 16:54:08 |
Message-ID: | 1383152048288-5776413.post@n5.nabble.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
Jeff Janes wrote
> The index insertions should be fast until the size of the active part of
> the indexes being inserted into exceeds shared_buffers by some amount
> (what
> that amount is would depend on how much dirty data the kernel is willing
> to
> allow in the page cache before it starts suffering anxiety about it). If
> you have enough shared_buffers to make that last for 15 minutes, then you
> shouldn't have a problem inserting with live indexes.
Sooner or later you'll have to checkpoint those shared_buffers... and we are
talking about GB of data (my understanding is that we change basically every
btree page, resulting in re-writing of the whole index).
--
View this message in context: http://postgresql.1045698.n5.nabble.com/Fast-insertion-indexes-why-no-developments-tp5776227p5776413.html
Sent from the PostgreSQL - hackers mailing list archive at Nabble.com.
From | Date | Subject | |
---|---|---|---|
Next Message | Robert Haas | 2013-10-30 16:56:55 | Re: Something fishy happening on frogmouth |
Previous Message | Andrew Dunstan | 2013-10-30 16:52:56 | Re: How can I build OSSP UUID support on Windows to avoid duplicate UUIDs? |