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+--- Thread: modbus polling and cpu overcharging (/showthread.php?tid=5800)
modbus polling and cpu overcharging - gdimaria - 20.12.2024
hi,
I have a LM whose CPU is often overloaded (it even restarts!).
I have analyzed every possible cause, including infinite loop scripts, but nothing.
The only thing I notice is a continuous telegram traffic from an external modbus gateway to which several devices are connected.
There are several telegrams frequently updated and/or repeated.
Could this be the cause of the overload?
Is it possible to monitor the CPU load trend to determine when it overloads?
Thanks in advance
Peppe
RE: modbus polling and cpu overcharging - admin - 20.12.2024
Install System load app and check which process is consuming max CPU/RAM.
RE: modbus polling and cpu overcharging - gdimaria - 21.12.2024
(20.12.2024, 09:43)admin Wrote: Install System load app and check which process is consuming max CPU/RAM.
I already done, those ones are always in pole position... enspecially nginx (there are several users simultaneously pointing their browser to LM).
RE: modbus polling and cpu overcharging - Daniel - 23.12.2024
The CPU is nice and low. You should wait till the high CPU happens.
RE: modbus polling and cpu overcharging - gdimaria - 23.12.2024
(23.12.2024, 08:52)Daniel Wrote: The CPU is nice and low. You should wait till the high CPU happens.
It's hard to take a screenshot when it peaks. However, nginx is always very high in that case.. as the signed others.
Often CUP/IO gets 3.50 and more... until it reboots!
RE: modbus polling and cpu overcharging - AEK - 24.12.2024
(23.12.2024, 18:56)gdimaria Wrote:(23.12.2024, 08:52)Daniel Wrote: The CPU is nice and low. You should wait till the high CPU happens.
It's hard to take a screenshot when it peaks. However, nginx is always very high in that case.. as the signed others.
Often CUP/IO gets 3.50 and more... until it reboots!
It seems like you have loop in scripts or somthing like that. you have very high knx tp load/
make objects sort order by update time and see what GA often updates
RE: modbus polling and cpu overcharging - Daniel - 24.12.2024
Send me your backup to PM.
RE: modbus polling and cpu overcharging - gdimaria - 24.12.2024
(24.12.2024, 09:18)Daniel Wrote: Send me your backup to PM.
I can't find the attachement button anymore in PM interface...
RE: modbus polling and cpu overcharging - Daniel - 24.12.2024
It was never there, use some cloud storage and send me a link.
RE: modbus polling and cpu overcharging - gdimaria - 02.01.2025
(24.12.2024, 10:30)Daniel Wrote: It was never there, use some cloud storage and send me a link.
Referring to our PM:
I meant It would be nice to be able to associate a virtual object to the cpu/memory load, as is already possible with the cpu temperature. In order to be able to trend and thus understand the exact moments in which it overloads
RE: modbus polling and cpu overcharging - Daniel - 02.01.2025
This is KNX TP UART chip temperature not the CPU itself.
https://forum.logicmachine.net/showthread.php?tid=2233&pid=13948#pid13948