Re: [PERFORM] B-Heaps

2010-06-15 Thread A. Kretschmer
In response to Greg Smith : For details about what the database does there, see Inside the PostgreSQL Buffer Cache at http://projects.2ndquadrant.com/talks Nice paper, btw., thanks for that! Regards, Andreas -- Andreas Kretschmer Kontakt: Heynitz: 035242/47150, D1: 0160/7141639 (mehr: -

Re: [PERFORM] B-Heaps

2010-06-15 Thread Matthew Wakeling
On Mon, 14 Jun 2010, Eliot Gable wrote: Just curious if this would apply to PostgreSQL: http://queue.acm.org/detail.cfm?id=1814327 Absolutely, and I said in http://archives.postgresql.org/pgsql-performance/2010-03/msg00272.php but applied to the Postgres B-tree indexes instead of heaps. It's

Re: [PERFORM] PostgreSQL as a local in-memory cache

2010-06-15 Thread Steve Wampler
Chris Browne wrote: jgard...@jonathangardner.net jgard...@jonathangardner.net writes: My question is how can I configure the database to run as quickly as possible if I don't care about data consistency or durability? That is, the data is updated so often and it can be reproduced fairly rapidly

Re: [PERFORM] PostgreSQL as a local in-memory cache

2010-06-15 Thread Craig James
[oops, didn't hit reply to list first time, resending...] On 6/15/10 9:02 AM, Steve Wampler wrote: Chris Browne wrote: jgard...@jonathangardner.net jgard...@jonathangardner.net writes: My question is how can I configure the database to run as quickly as possible if I don't care about data

Re: [PERFORM] PostgreSQL as a local in-memory cache

2010-06-15 Thread jgard...@jonathangardner.net
On Jun 15, 8:47 am, Chris Browne cbbro...@acm.org wrote: jgard...@jonathangardner.net jgard...@jonathangardner.net writes: My question is how can I configure the database to run as quickly as possible if I don't care about data consistency or durability? That is, the data is updated so

Re: [PERFORM] PostgreSQL as a local in-memory cache

2010-06-15 Thread Chris Browne
swamp...@noao.edu (Steve Wampler) writes: Or does losing WAL files mandate a new initdb? Losing WAL would mandate initdb, so I'd think this all fits into the set of stuff worth putting onto ramfs/tmpfs. Certainly it'll all be significant to the performance focus. -- select 'cbbrowne' || '@' ||

Re: [PERFORM] B-Heaps

2010-06-15 Thread Yeb Havinga
Greg Smith wrote: Eliot Gable wrote: Just curious if this would apply to PostgreSQL: http://queue.acm.org/detail.cfm?id=1814327 It's hard to take this seriously at all when it's so ignorant of actual research in this area. Take a look at

Re: [PERFORM] PostgreSQL as a local in-memory cache

2010-06-15 Thread Jaime Casanova
On Tue, Jun 15, 2010 at 12:37 PM, Chris Browne cbbro...@acm.org wrote: swamp...@noao.edu (Steve Wampler) writes: Or does losing WAL files mandate a new initdb? Losing WAL would mandate initdb, so I'd think this all fits into the set of stuff worth putting onto ramfs/tmpfs.  Certainly it'll

Re: [PERFORM] PostgreSQL as a local in-memory cache

2010-06-15 Thread Josh Berkus
On 6/15/10 10:37 AM, Chris Browne wrote: swamp...@noao.edu (Steve Wampler) writes: Or does losing WAL files mandate a new initdb? Losing WAL would mandate initdb, so I'd think this all fits into the set of stuff worth putting onto ramfs/tmpfs. Certainly it'll all be significant to the