Subject RE: [firebird-support] Windows Server 2012 with Firebird 2.5.2 64-bit
Author Leyne, Sean
> I recently purchased new top of the line hardware to host a new Firebird
> server on Windows 2012 server utilizing Hyper-V.
> After building the hardware and OS I installed Firebird 2.5.2 64 bit and
> installed the classic version.  I ran some tests and the a simple test caused the
> Firebird process to peg at 100% for 10-20 minutes, until terminated the
> connection.  This is a simple query of a few thousand records.
> After running multiple performance tests, I could not see anything wrong
> with the hardware.
> So, after reading through this forum and finding nothing, I decided to install
> Windows 2008 R2 and try again.  After doing so, everything ran perfectly, my
> database performance was wonderful.

Have you tested basic IO from the VM, with a tool like CrystalDiskMark or SQLIO (*not* ATTO)?