| From: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com> |
|---|---|
| To: | Jeff Janes <jeff(dot)janes(at)gmail(dot)com> |
| Cc: | David Steele <david(at)pgmasters(dot)net>, Stephen Frost <sfrost(at)snowman(dot)net>, Robert Haas <robertmhaas(at)gmail(dot)com>, Beena Emerson <memissemerson(at)gmail(dot)com>, tushar <tushar(dot)ahuja(at)enterprisedb(dot)com>, Prabhat Sahu <prabhat(dot)sahu(at)enterprisedb(dot)com>, Ashutosh Sharma <ashu(dot)coek88(at)gmail(dot)com>, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, Kuntal Ghosh <kuntalghosh(dot)2007(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: increasing the default WAL segment size |
| Date: | 2017-03-24 04:28:57 |
| Message-ID: | 6de5a341-6bec-35a6-e085-834c36fa58d6@2ndquadrant.com |
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| Lists: | pgsql-hackers |
On 3/23/17 21:47, Jeff Janes wrote:
> I have a pg_restore which predicts the file 5 files ahead of the one it
> was asked for, and initiates a pre-fetch and decompression of it. Then
> it delivers the file it was asked for, either by pulling it out of the
> pre-staging area set up by the N-5th invocation, or by going directly to
> the archive to get it. This speeds up play-back dramatically when the
> files are stored compressed and non-local.
Yeah, some better support for prefetching would be necessary to avoid
having to have any knowledge of the file naming.
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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