Re: Poor Load Balancer performance (Apache Users)

if you have thousands of connections you need to have more servers and then a balancer will help spreading the load (not increasing performance) among all the servers, or add bigger figures to your mpm settings in your single server (if the hardware will be able to cope with it).

If you have thousand of connections and just 800 workers, then it is logical that it clogs.

Supposing 800 connections would be enough for peaks if you want no clogging with prefork because load is quite variable it is better to specify a higher minspareservers value (more workers readily available, not have to be spawned, less cpu usage because less processes have to be spawned).

I would try to go for event asap though, much better to have to spawn 8 processes with 100 threads than 800 processes.

El jue, 27 may 2021 a las 13:35, Marc Serra (<mserra@xxxxxxxxx>) escribió:

Thank's Eric, I understand.

But if configuring a load balancer I'm adding another hop with reducing the performance, seems that is not the best way to improve this performance, correct?

As I explained before, it's only a test setup before move to a real environment.

Now I have a single server (8 cores, 32GB RAM with prefork) and the following apache tunning. In some moments, I have thousands of concurrent connections that collapse the server and I thought the best way to fix this was by setting up a load balancer. Isn't it?

ServerLimit 800
StartServers 10
MinSpareServers 200
MaxSpareServers 400
MaxRequestsWorkers 800
MaxConnectionsPerChild 10000

Missatge de Eric Covener <covener@xxxxxxxxx> del dia dj., 27 de maig 2021 a les 13:15:
On Thu, May 27, 2021 at 7:06 AM Marc Serra <mserra@xxxxxxxxx> wrote:
> I has inverted the results! I'm sorry!

I see -- I think this is a case where you aren't taxing either backend
and you've just added another hop.
This is probably especially true when testing static files.

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