Use of the UC IPS

Hello

The number of activated signatures has an impact on the CPU?

Does the number of enabled signatures have an impact on the CPU usage?

Short answer: Yes. Long answer: it depends on the combination of signatures, configured state action, the frequency to be mapped, etc..

  • Active and active: Signature consumes CPU and memory, if matched, configured one or more actions will be taken. Overall, this status has the greatest potential for the use of resources.
  • People with disabilities and Active: Signature consumes CPU and memory, if matched, the configured action will NOT be taken. Technically this status will result in less use of resources (variable) because stocks should not be generated/plug.
  • With disabilities and pensioners: Signature uses no CPU or memory and will not be used in inspection to correspondent. This situation will of course in the use of resources less.

Overall, if you're simply testing/troubleshooting, you can toggle a signature, but if you plan on leaving off long term, you should also retire to free up resources and improve the performance of the sensor. The law of retirement (or not - retiring) a signature is a task many resources for the sensor that its State/game tables have to be recompiled, but once that completes status notes above apply.

Tags: Cisco Security

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