On Thu, 2004-02-05 at 00:32, Christopher Browne wrote: > > 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.
I don't. I got a similar boost out of 2.6 when dealing with extreme concurrency. Then again, I also got a similar boost out of 7.4. The two together tickled my bank account. ;) One question though... It sounds like your 7.3 binaries are 64-bit and your 7.4 binaries are 32-bit. Have you tried grabbing the SRPM for 7.4 and recompiling it for X86_64? chris ---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html