Subject Re: [firebird-support] slow performance on linux
Author Dmitry Kuzmenko
Hello, Ivaylo!

Friday, April 6, 2012, 5:48:51 PM, you wrote:

II> I have a strange performance problem with fb 2.5.X. My friend told me
II> that a program that he uses is working faster when database is on
II> Windows XP compared to database on Linux. I didn't believe and did some
II> tests. I can't explain the results to myself. For the tests I've used

mostly performance depends on disk and processor. disk drivers
on Windows can be better or worse on Linux, resulting better or worse
performance. No surprise.

II> wait to finish. The tests were made on different virtual machine on
II> VirtualBox Host. The host is Intel i3 2100T with 4GB DDR3 RAM and raid 5
II> array(linux software raid). Every virtual machine i've created was with
II> similar parameters. 1GB RAM, 8GB HDD The results are:

I'm very suspicious about test on virtual machines, especially
VirtualBox. Again, performance depends on implementation of layer
between virtual machine, used operating system, and hardware.

By my tests performance on VMWare Desktop and Virtual PC is 1.5-2
times worse than on pure hardware, mostly on disk performance.

So, I consider your tests unclear.

Dmitry Kuzmenko,