How to determine whether CPU usages of the system and processes are high for S series switches

For S series switches (except the S1700), the system CPU usage is within a normal range when the following conditions are met:
- The CPU usage does not exceed 80% when the system runs for a long period.
- The CPU usage does not exceed 95% in a short period and does not keep increasing.
- No high CPU usage alarm is generated.
In the following situations, the system may generate an alarm when CPU usage becomes high instantly and then clear this alarm rapidly: Cards just start. Information about all optical modules is queried at a time. Traffic volume increases instantly. This situation is a normal situation and does not affect the device operation.

CPU usage of a CPU task process may become low or high, depending on the service volume and processing time. CPU usage is within a normal range as long as the system CPU usage does not exceed 80% and no high CPU usage alarm is generated.

For possible causes and common troubleshooting procedures for high CPU usage, see the following:
- For the S12700, see "High CPU Usage > Common Information" in S12700 Troubleshooting - Preliminary.
- For the S7700 and S9700, see "High CPU Usage > Common Information" in S7700&S9700 Troubleshooting - Preliminary.
- For the S1720, S2700, S3700, S5700, and S6700, see "High CPU Usage > Common Information" in S1720&S2700&S3700&S5700&S6700 Troubleshooting - Preliminary.
- For the S9300, see "High CPU Usage > Common Information" in S9300 Troubleshooting - Preliminary.
- For the S600-E, see "High CPU Usage > Common Information" in S600-E Troubleshooting - Preliminary.

Other related questions:
How to determine whether the memory usage of an S series switch is high
high CPU usage
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