Guacamole client is extremely slow and laggy compared to direct VNC client

[Ben Davis <be...@boldidea.org>]

Hi, I've installed guacamole-1.0.0 on an AWS EC2 t3a.small
<https://aws.amazon.com/ec2/instance-types/t3/> instance (2GB ram). I'm
running a tigervnc server w/ xfce desktop. When testing with a normal VNC
client, performance is very good. However, when running through guacamole,
it has very heavy lag.  The delay between clicking a menu and seeing the
menu open can be several seconds.

I also tried a noVNC client in Chrome and performance was great. How might
I find where the bottleneck is?

Re: Guacamole client is extremely slow and laggy compared to direct VNC client

[Ben Davis <be...@boldidea.org>]

I guess I failed to mention I had it behind an nginx proxy, and it turns
out that was the bottleneck. I shamefully skipped over the guac manual on
the proper settings for nginx. Thanks for pointing me in the right
direction, though!




On Wed, Nov 6, 2019 at 12:13 PM Mike Jumper <mj...@apache.org> wrote:

> On Wed, Nov 6, 2019, 10:04 Ben Davis <be...@boldidea.org> wrote:
>
>> Hi, I've installed guacamole-1.0.0 on an AWS EC2 t3a.small
>> <https://aws.amazon.com/ec2/instance-types/t3/> instance (2GB ram). I'm
>> running a tigervnc server w/ xfce desktop. When testing with a normal VNC
>> client, performance is very good. However, when running through guacamole,
>> it has very heavy lag.  The delay between clicking a menu and seeing the
>> menu open can be several seconds.
>>
>
> Lag between input and result should be negligible, definitely not on the
> order of seconds for something as simple as a menu.
>
> Do you see any messages in your Tomcat logs from Guacamole warning about
> falling back to HTTP?
>
> Is the system running Guacamole and guacd under noticable resource
> pressure?
>
> What is the nature of the network between yourself and Tomcat? Is anything
> present which might interfere with communication which was not present in
> your other tests?
>
> - Mike
>
>

Re: Guacamole client is extremely slow and laggy compared to direct VNC client

[Mike Jumper <mj...@apache.org>]

On Wed, Nov 6, 2019, 10:04 Ben Davis <be...@boldidea.org> wrote:

> Hi, I've installed guacamole-1.0.0 on an AWS EC2 t3a.small
> <https://aws.amazon.com/ec2/instance-types/t3/> instance (2GB ram). I'm
> running a tigervnc server w/ xfce desktop. When testing with a normal VNC
> client, performance is very good. However, when running through guacamole,
> it has very heavy lag.  The delay between clicking a menu and seeing the
> menu open can be several seconds.
>

Lag between input and result should be negligible, definitely not on the
order of seconds for something as simple as a menu.

Do you see any messages in your Tomcat logs from Guacamole warning about
falling back to HTTP?

Is the system running Guacamole and guacd under noticable resource pressure?

What is the nature of the network between yourself and Tomcat? Is anything
present which might interfere with communication which was not present in
your other tests?

- Mike