Increase maximum subscription limit = 100 (ignores those above it)

[KenSense]

Hi,

Using SINUMERIK OPC UA Server not sure who set the 100 subscriptions.
Those above 100 are ignored, await sub.subscribe_data_change(subscribe_node_list)
If I make two lists the limit is the same, it stops at 100 subscriptions on the server.

I need 150 subscriptions, is that server side or is it somewhere in opcua-asyncio?

Thanks

[AndreasHeine]

150 subscriptions or 150 monitored items ?

a subscription is just a long-polling-like transport mechanism which can have thousands of monitored items (nodes/variables)

[AndreasHeine]

there is also a limit on how many monitored items you can add in one call!

please check the server operational limits:

example subscribe maxpercall aware:
https://github.com/AndreasHeine/opcua-tutorial/blob/main/client/client1.py

[KenSense]

I have 144 nodes I subscribe to, many are arrays:
Like 1 subscription/node is "ns=2;s=/Channel/Parameter/R[u1, 1, 50]" gives me a notification if 1 of those 50 variables changes.

I checked the serverCapabilities but mine doesn't seem to mention a MaxSubscriptions.
So should I assume there isn't one on the server or is it just not provided?

String/byte sizes are all very big 16.7MB, MaxArraylength=65536 so I don't see a problem there.

edit:
I do get an error in UaExpert when trying to go over this 100:

edit2: removed some to get below 100, since it's probably a hard server limit.