Hi all,
I have been doing a lot of testing on a monster Windows server so that we
can move from a Solaris 2.1.3 build (thanks Paul) to 2.5 on preferably
Windows, or perhaps Linux.
The box has 8 processors, each with 8 cores. These are arranged into 4
NUMA nodes, each with 2 processors. Windows reports 4 processors (i.e.
each NUMA node is seen as one processor) , each with 16 cores.
128GB RAM, Windows 2008 R2.
Firebird Version: WI-V2.5.2.26539 Firebird 2.5
My concern is that in this article:
http://www.firebirdsql.org/manual/qsg25-classic-or-super.html
it is stated that SuperServer uses one processor (unless CPUAffinityMask
is changed) and that Classic and SuperClassic ignore CPUAffinityMask, and
use all processors.
When running under load (150+ busy connections) SuperClassic clearly uses
only one NUMA node (threads are spread across 16 cores), while Classic is
spread evenly across all 64 cores. CPUAffinityMask makes no difference (as
stated in the docs).
How is this going to run in V3? Will we see full use of all cores on all
processors, or will the behaviour be as in SuperClassic.
Is this a machine architectural issue? i.e. the NUMA node architecture
makes it a little more difficult for one NUMA node to access the memory
'allocated' to another NUMA node? which implies that V3's shared cache may
be restricted to one node, and not spread across all nodes?
Regards
Vince
Vince Duggan
I.T. Architect
Virgin Active South Africa (Pty) Ltd
Tel (+27) (0)21 684 3525
Fax (+27) (0)21 684 3225
Cell (+27) (0)82 747 6127
Email: vince.dug...@virginactive.co.za
Live happily ever active
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