database performance: FreeBSD vs Linux vs Solaris: Multi-Threaded Select
Multi-Threaded Select Performance
MySQL
With up to 100 threads and a 5 milliseconds delay, FreeBSD and Linux are neck and neck but Linux
suffers a performance drop after 55 threads (the data for Solaris is not yet available):
The performance blip at around 55 threads is reproducible (data from a separate run).
With a 10 milliseconds delay in each thread, FreeBSD and Linux are still even and Solaris is 50% slower:
As above, in more detail (per number of threads started):
With many more threads (and a 5 millisecond delay), Solaris failed after 500 threads. Linux and FreeBSD are still very close,
with FreeBSD marginally ahead:
PostgreSQL
With up to 100 threads and a 5 milliseconds delay, there is little difference:
Increasing the delay to 10 milliseconds does not reveal any more differences:
As above, in more detail (per number of threads started):
With many more threads (and a 5 millisecond delay), Solaris does well but fails after 500 threads.
Linux continues to work up to thousands of threads (FreeBSD failed this test):
