Running into an issue where all of my SQL Bridge threads clock up for readBlocking tasks from transactions. This ends up causing a domino effect where all of my transactions hold up until a timeout occurs.
I’ve ran into this on two separate gateways with different devices now, and I’m struggling to find a good solution.
In this particular instance, PLC memory and CPU usage are low, the numbers showing on the ignition device page seem good, and wireshark didn’t seem to show any obvious signs of issues. The system has 57 Transactions all set to Read mode, which ends up only subscribing to 58 tags total.
I’ve tried increasing concurrent requests to the PLC, opening more threads for SQL Bridge, lowering the OPC read timeout. All of which don’t seem to fix any issues.
I’ve got a ticket open with IA, but I haven’t heard anything back just yet, and wondered if anyone else in the community has an idea of what to look for.