Re: 7.3 vs 7.4 performance

I have some results with our DBT-2 (OLTP) workload on various linux-2.6
filesystems, if you'll find that interesting:
http://developer.osdl.org/markw/fs/dbt2_project_results.html

I've found JFS to perform similarly to ext2. Reiserfs isn't far behind.
XFS and ext3 fall off a bit. These results are also on a 4-way Xeon,
with about 70 drives and a ~ 30GB database.

Mark

On 5 Feb, Carlos Eduardo Smanioto wrote:
>> I did some heavy-transaction-oriented tests recently on somewhat
>> heftier quad-Xeon hardware, and found little difference between 2.4
>> and 2.6, and a small-but-quite-repeatable advantage with FreeBSD 4.9.
>> Now, I'm quite sure my load was rather different from yours, but I
>> find the claim of doubling of speed rather surprising.
>> --
>
> What's the type of File System you used in the Linux? I am wanting to know
> which is the operational system better for PostgreSQL: FreeBSD versus Linux
> 2.6.
>
> Thanks.
>
> []'s
> Carlos Eduardo Smanioto (Brazil)
>
> ----- Original Message -----
> From: "Christopher Browne" <cbbrowne(at)acm(dot)org>
> To: <pgsql-performance(at)postgresql(dot)org>
> Sent: Thursday, February 05, 2004 3:32 AM
> Subject: Re: [PERFORM] 7.3 vs 7.4 performance
>
>
>> Oops! orion(at)trustcommerce(dot)com (Orion Henry) was seen spray-painting on a
> wall:
>> > I've done some testing of 7.3.4 vs 7.4.1 and found 7.4.1 to be 20%-30%
>> > slower than 7.3.4. Is this common knowledge or am I just unlucky with
>> > my query/data selection?
>>
>> That seems unusual; the opposite seems more typical in view of there
>> being some substantial improvements to the query optimizer.
>>
>> Have you tried doing EXPLAIN ANALYZE on the queries on both sides?
>> There would doubtless be interest in figuring out what is breaking
>> down...
>>
>> > Things of note that might matter: the machine is a dual Opteron
>> > 1.4GHz running Fedora Core 1 Test 1 for X86_64. The 7.3.4 was from
>> > the Fedora distro and the 7.4.1 was the PGDG package. The database
>> > is 3.5 Gigs with 10 millions rows and the machine had 1 Gig or ram.
>> >
>> > Oh... as a side note I'm happy to announce that the 2.6 Linux kernel
>> > has more than DOUBLED the speed of all my Postgres queries over the
>> > 2.4. =)
>>
>> I did some heavy-transaction-oriented tests recently on somewhat
>> heftier quad-Xeon hardware, and found little difference between 2.4
>> and 2.6, and a small-but-quite-repeatable advantage with FreeBSD 4.9.
>> Now, I'm quite sure my load was rather different from yours, but I
>> find the claim of doubling of speed rather surprising.
>> --
>> (format nil "~S(at)~S" "aa454" "freenet.carleton.ca")
>> http://www.ntlug.org/~cbbrowne/spiritual.html
>> Failure is not an option. It comes bundled with your Microsoft product.
>>
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