Re: Straightforward changes for increased SMP scalability

From: "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>
To: Andrew Dunstan <andrew(at)dunslane(dot)net>
Cc: Gregory Stark <stark(at)enterprisedb(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Straightforward changes for increased SMP scalability
Date: 2007-07-16 16:04:41
Message-ID: 469B9719.1000604@commandprompt.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

Andrew Dunstan wrote:
>
>
> Joshua D. Drake wrote:
>> Gregory Stark wrote:
>>> "Joshua D. Drake" <jd(at)commandprompt(dot)com> writes:
>>>

>> If I have 16 cores, things are still really loud but I start to not be
>> able to tell the difference. The percentage of improvement is much lower.
>>
>> E.g, 16 cores works and PostgreSQL work great, but it is not nearly as
>> fantastic with 16 cores as 8 cores (in terms percentage gain).
>>

> That's not the same thing as slowing down, it just means that scaling
> isn't always linear, which isn't surprising.

Right. Which is why I reposted, but it also makes what Simon proposes
that much more attractive *because* it helps the linear problem (in theory).

Joshua D. Drake

>
> cheers
>
> andrew
>

--

=== The PostgreSQL Company: Command Prompt, Inc. ===
Sales/Support: +1.503.667.4564 || 24x7/Emergency: +1.800.492.2240
Providing the most comprehensive PostgreSQL solutions since 1997
http://www.commandprompt.com/

Donate to the PostgreSQL Project: http://www.postgresql.org/about/donate
PostgreSQL Replication: http://www.commandprompt.com/products/

In response to

Browse pgsql-hackers by date

  From Date Subject
Next Message Tom Lane 2007-07-16 16:09:30 Re: Straightforward changes for increased SMP scalability
Previous Message Tom Lane 2007-07-16 16:02:18 Re: minor compiler warning on OpenBSD