> 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" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, February 05, 2004 3:32 AM Subject: Re: [PERFORM] 7.3 vs 7.4 performance > Oops! [EMAIL PROTECTED] (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 "[EMAIL PROTECTED]" "aa454" "freenet.carleton.ca") > http://www.ntlug.org/~cbbrowne/spiritual.html > Failure is not an option. It comes bundled with your Microsoft product. > > ---------------------------(end of broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/docs/faqs/FAQ.html ---------------------------(end of broadcast)--------------------------- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
