Disclaimer

Back when this was a blog about using DTrace for mail server performance tuning the disclaimer looked like this:

I do not suggest that you use any results shown here to make decisions about your own production system(s).

There are a number of things about these tests that mean that they’re not directly applicable to the real-world.

1. Everything’s running off one disk, and hence one disk controller.
   
2. I haven’t gone out of my way to tune the Solaris install.
   
3. The SMTP traffic is being generated by the same machine that’s receiving it.
   
4. The test machine is running a number of services that you wouldn’t expect to see on a real mail server. For instance, a GNOME desktop, web browser, and so on.
   

However, you should be able to use the methods shown here to generate data about your production systems, and make a decision accordingly.

That still holds for the older entries. But please also note that anything written here consists of my opinions, and not those of my employer.