What is the threshold for VSX on 15k and 23k appliences

[Alex_Rozhko]

What is the ideal number of VS(s) I can run on 23k and 15k appliances? Each VS will run NGTX. 

[Kaspars_Zibarts]

It will depend what will run through those VSes

And what is the reason to have VSX in first place. 

I think I have seen and heard anything from handful to hundreds.

Everyone has own agenda with VSX, so really depends on your requirements

[Maarten_Sjouw]

If I remember correctly the total load of a 15K or 23K device would be around the 90% of the normal max load when using VSX, however when you use a VSLS cluster, you can spread the load over the members, so when you have 3 members, you could run a total of 180% out of the 300% available (compared to a single unit) when you take into account that you need to be able to cover 1 of the boxes failing. So each would run at 60% load.