All FreeBSD interested people will remember the document that Kris Kennaway released (Introducing FreeBSD). In this paper he explains how dramatic improvements have been achieved in FreeBSD 7.0; especially with regards to SMP and SQL database querying (MySQL and PostgreSQL). According to his findings FreeBSD even outperformes Linux.

There’s always been a healthy competition between Linux and FreeBSD, but stating that FreeBSD is faster than Linux, that hurts….

After major improvements in SMP support in FreeBSD 7.0, benchmarks show it performing 15% better than the latest Linux kernels (PDF, see slides 17 to 19) on 8 CPUs under PostgreSQL and MySQL. While a couple of benchmarks are not conclusive evidence, it can be assumed that FreeBSD will once again be a serious performance contender.

Linux kernel developer Nick Piggin reran the benchmark and came to a different conclusion: In his benchmark Linux was faster than FreeBSD.

I’m not an expert, but what do you guys think of this? Is Nick doing a fair analysis and comparison? Anybody been using FreeBSD 7 in a “heavy duty” (SQL) environment who can comment on this?