{{Quickfixn}} Performance numbers, esp in VM

Fri Aug 7 02:06:28 PDT 2020

Hi Jiho,
Keep also in mind that a VM has always an extra layer to access underlying resources such as RAM and CPUs, which (although optimized, such as the VMWare one is) is still an extra layer
A physical workstation, with similar characteristics, will be always faster than a VM…

My 2 cents 😉
Lan

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From: Quickfixn <quickfixn-bounces at lists.quickfixn.com> On Behalf Of Sergio Diego Demaestri
Sent: giovedì 6 agosto 2020 22:09
To: Mailing list for QuickFIX/n <quickfixn at lists.quickfixn.com>
Subject: Re: {{Quickfixn}} Performance numbers, esp in VM

Hi Jiho,

antivirus might be playing tricks, files in the form ClientHandlerThread-XXX-Debug.event.current.log and ClientHandlerThread-XXX-Debug.messages.current.log are constantly created.
To avoid this, you must modify the CreateHandlerThread class by deleting the log information.
By creating so many files, disk I / O negatively influences performance.
At this point it is important to exclude the App directories in the antivirus configuration. (In case you don't want to customize the class)
using perfmon.exe you can see what I say by filtering the PID of your App.

I hope it works and tell me the results.

Regards,
Sergio

De: Quickfixn <quickfixn-bounces at lists.quickfixn.com<mailto:quickfixn-bounces at lists.quickfixn.com>> En nombre de Jiho HAN
Enviado el: Friday, June 26, 2020 08:03 PM
Para: Mailing list for QuickFIX/n <quickfixn at lists.quickfixn.com<mailto:quickfixn at lists.quickfixn.com>>
Asunto: SPAM{{Quickfixn}} Performance numbers, esp in VM

We have a need for high throughput and started looking at how to improve our FIX application.
It’s mainly a drop copy scenario, basically receiving execution reports and creating orders and fills in our OMS.

After quite a bit of investigation, I created a sample server and client, a bare bones application that sends/receives FIX messages and see how fast we can “process” the messages.

On my own workstation, I can get about 7000+ messages per second if I use MemoryStore/NullLog (4500 using FileStore/FileLog) – essentially trying to eliminate all I/O.
However, this reduces down to about 1500 messages per second on a VM (VMWare).
I see CPU only around 30% utilization and plenty of memory available on the VM while it runs.
The specs of both machines are not that different.

Has anyone else done something similar or have similar experiences?
I have no clue why this app would run so much slower on a virtual machine.

Jiho
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