Date: Mon, 5 Apr 1999 09:36:09 +0400 From: Ilya Obshadko <ilya@zhurnal.ru> To: freebsd-stable@freebsd.org Subject: Poor SMP performance Message-ID: <5400.990405@zhurnal.ru>
next in thread | raw e-mail | index | archive | help
Hello, Few days ago I wrote to mysql mail list about poor performance on FreeBSD/SMP (Dual P-II 333, UW SCSI, 256M). Here is the answer I got: > The problem is related to SMP in FreeBSD. Because a database > server is I/O bound, and FreeBSD's SMP implementation does a giant > i/o lock around the kernel for each processor, it actually > is SLOWER to run MySQL on a dual processor FreeBSD machine than > on a single processor. I ran into the same problem -- had just > bought a dual pII 350, which then became my workstation machine > when MySQL ran slowly on it. > > The GOOD NEWS is that, on a single processor 450MHZ machine, I found > FreeBSD MySQL to run significantly FASTER than the benchmarks for any Linux > box, including dual PIIs. Any comments about it? Best regards, Ilya mailto:ilya@zhurnal.ru To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?5400.990405>