Cable TV headend software screenshot, showing a bunch of message log windows and the operator UI off to one side

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1. philpem (philpem@digipres.club)'s status on Thursday, 07-Mar-2024 12:30:34 JST philpem

   in reply to

   Upgraded Interactive UNIX to version 4.1.1 and the issue became immediately obvious: it was running out of STREAMS queues. On 4.1+4.1a this seems to cause kernel memory corruption and eventually a TCP/IP stack crash.
   On 4.1.1 the kernel barks loudly about the problem on the system console. A quick kernel tweak to increase NQUEUE to 1600 and we're golden.
   Did some spit and polish on the window arrangement too, now the Wirelink windows look sensible.