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Do you know where it can be checked, how much memory is currently being used by the logbuffer?

some-switch#show log | i Buffer|Trap|udp Buffer logging: level debugging, 2268 messages logged, xml disabled, Trap logging: level notifications, 1272 message lines logged Logging to xx.xx.xx.xx (udp port 514, audit disabled, Log Buffer (50000 bytes):

I have trouble finding the exact process used for that:

some-switch#show processes memory sorted | inc log|Pool|Allo Processor Pool Total: 73899224 Used: 28296368 Free: 45602856 I/O Pool Total: 14680064 Used: 12240012 Free: 2440052 Driver te Pool Total: 1048576 Used: 40 Free: 1048536 PID TTY Allocated Freed Holding Getbufs Retbufs Process 286 0 541580 525008 15608 4536 0 Syslog 188 0 180 180 7052 0 0 REP Topology cha 273 0 0 0 7052 0 0 Syslog Traps 5 0 4277172 86430832 7052 2711884 53732884 Pool Manager

Thank you in advance for your suggestions.

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  • Did you set the logging buffer size? If not, it is the default size, but we would need to know the specific device model and OS to tell you what the default size is. Commented Nov 25, 2020 at 20:52
  • I think my question was misunderstood here. The logging size was manually set (though not by me) to 50k bytes as can be seen from the output, but I'm asking about a command which would show me the exact current usage not the maximum cap size for the logbuffer. Commented Nov 25, 2020 at 20:55
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    The exact usage is the size to which it is set. The OS allocates that amount to the buffer, and nothing else will use that memory, except the buffer. Commented Nov 25, 2020 at 20:56
  • Oh, I see. Didn't expect that to be the case when the device wouldn't be generating that many logs so as to fill up the whole buffer. Anyway, shouldn't that memory allocation be also visible somewhere in the "show processes memory" output? Commented Nov 25, 2020 at 21:00
  • Did any answer help you? If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you can post and accept your own answer. Commented Dec 16, 2020 at 23:43

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You are trying to use the wrong command. You show the process memory (show processes), not the buffer memory. Show the buffer memory with the show memory command. Something like:

show memory allocating-process | i logger

That command shows the logging buffer in my router. Notice that the buffer is allocated during router initialization.

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