[Ovmsdev] High hologram usage

[Michael Balzer]

Craig,

if (?) you're running a server v3 instance with the shown "example.net" 
config, the keepalive is not your main issue, as it will keep retrying 
to connect indefinitely. But it would have done so all the time already.

Regarding wifi/cellular, did you check your logs yet for unexpected 
switches?

Regards,
Michael


Am 16.04.25 um 19:07 schrieb Craig Leres via OvmsDev:
> On 4/10/25 14:21, Craig Leres via OvmsDev wrote:
>> I'm now testing 3.3.004-313-g78a49a59 (which is older than 
>> 3.3.004-323- gbc1f75c9, yet another git annoyance for me that the 
>> hashes are not chronological...) But I think it has one change that 
>> 3.3.004-313- g78a49a59 does not.
>
> It looks like 78a49a59 is the source of my hologram usage increase. I 
> see these:
>
>     +  m_updatetime_keepalive = 29*60;
>     +  m_legacy_event_topic = true;
>
> But m_legacy_event_topic doesn't look like it has an impact 
> (mg_mqtt_publish() still gets called).
>
> However, this worries me:
>
> +    [server.v3] updatetime.keepalive -- Max number of seconds to 
> allow the MQTT connection to be idle before
> +                                        sending PINGREQ. Should be 
> set slightly shorter than the network's
> +                                        NAT timeout and the timeout 
> of your MQTT server. If these are unknown
> +                                        you can use trial and error. 
> Symptoms of keepalive being too high are
> +                                        a lack of metric updates 
> after a certain point, or "Disconnected from
> +                                        OVMS Server V3" appearing in 
> the log. In previous releases this used
> +                                        the Mongoose default of 60. 
> New default value 1740 aligns with
> +                                        observed Hologram timeout of 
> 1800.
>
> but, again, not clear how it can drive up cellular usage when I'm on 
> wifi. (Unless there is some kind of wifi-sleep mode happening that 
> causes cellular to be used?) So maybe this is just triggering a 
> previously latent bug?
>
> Anyway, I don't see how to disable this short of commenting code out.
>
>         Craig
>
> OVMS# config list server.v3
> server.v3 (readable writeable)
>   port:
>   server: example.net
>   tls: yes
>   topic.prefix:
>   updatetime.connected:
>   updatetime.idle:
>   user: fred
>
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-- 
Michael Balzer * Am Rahmen 5 * D-58313 Herdecke
Fon 02330 9104094 * Handy 0176 20698926

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