ISE 2.4 Patch 9 - CPU and Memory problems
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11-25-2019 08:01 AM - edited 11-25-2019 08:10 AM
Hey all,
I have 2 ISE nodes (Active/Standby PAN) and both are PSN. Month ago I had a weird problem: Memory in my first node was in 90 percentages although 802.1x were not deployed on network, I mean it was idle, only pxGrid was used. I opened a TAC case for that and after one day of opening the case, I noticed that Memory downgraded to 30s% that was awesome :)
Today I got notified that users are claiming that they cannot authenticate and access Wifi for 10 mins and then everything turned to be okay. I checked ISE which showed very high "Authentication Latency" for that period. While I was investigating the problem, ISE stopped to show system summary for that node:
I connected to node via SSH and checked system utilization there and noticed one process is taking huge amount of CPU:
I do not know what can be cause of the problem? Am i hitting any bug? I think I have to do reboot but I wanted to make sure before doing it.
Thanks in advance!
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Identity Services Engine (ISE)

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11-25-2019 08:05 AM
Why are you running patch 0!? You should be on latest patch unless tac says otherwise
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11-25-2019 08:11 AM
@Jason Kunst sorry, my bad. It was typing error. I am.using patch 9
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11-25-2019 08:36 AM
You would have to open a tac case to confirm, a fix is coming in a later patch and the temporary solution is to reload affected nodes.
Patch 10 resolved 101 bugs that patch 9 did not. It would still be beneficial to move to it to rule them out.
https://www.cisco.com/c/en/us/td/docs/security/ise/2-4/release_notes/b_ise_24_rn.html#id_122459
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11-25-2019 08:07 AM
There are hundreds of fixed bugs, of which, quite a few present symptoms like you are seeing. If you are running patch 10, there is an unpatched memory leak that can also cause similar features.
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11-25-2019 08:12 AM
@Damien Miller sorry, as you said mis typo. It is patch 9
