From: Guy Rouillier <guyr-ml1@burntmail.com>
To: pgsql-performance@postgresql.org
Subject: Re: Making the most of memory?
Date: Wed, 23 Jan 2008 14:57:09 -0500
Message-ID: <47979C15.3040406@burntmail.com> (raw)
In-Reply-To: <dcc563d10801231044p1dba892r9b8bf1269395f068@mail.gmail.com>
References: <4796BE84.9030803@centriccrm.com>
<dcc563d10801222120q78e390dbj2b884eca729c2975@mail.gmail.com>
<B30794E6-CD2A-43C1-B431-E24B56FBFB1D@concursive.com>
<dcc563d10801231044p1dba892r9b8bf1269395f068@mail.gmail.com>
Scott Marlowe wrote:
> I assume you're talking about solid state drives? They have their
> uses, but for most use cases, having plenty of RAM in your server will
> be a better way to spend your money. For certain high throughput,
> relatively small databases (i.e. transactional work) the SSD can be
> quite useful.
Unless somebody has changes some physics recently, I'm not understanding
the recent discussions of SSD in the general press. Flash has a limited
number of writes before it becomes unreliable. On good quality consumer
grade, that's about 300,000 writes, while on industrial grade it's about
10 times that. That's fine for mp3 players and cameras; even
professional photographers probably won't rewrite the same spot on a
flash card that many times in a lifetime. But for database
applications, 300,000 writes is trivial. 3 million will go a lot longer,
but in non-archival applications, I imagine even that mark won't take
but a year or two to surpass.
--
Guy Rouillier
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: guyr-ml1@burntmail.com
Subject: Re: Making the most of memory?
In-Reply-To: <47979C15.3040406@burntmail.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox