F5 is upgrading its customer support chat feature on My.F5.com. Chat support will be unavailable from 6am-10am PST on 1/20/26. Refer to K000159584 for details.

Forum Discussion

Muhammad_Irfan1's avatar
Muhammad_Irfan1
Icon for Cirrus rankCirrus
Dec 16, 2014

Busiest CPU jumps to 100% usage

F5 LTM memory usage id 18.1% and busiest CPU remains between 6 to 13 %. But yesterday and today again I noticed a spike in busiest CPU and busiest cpu rises to 100% while average cpu was 17 at tha...
kash_49328's avatar
kash_49328
Icon for Nimbostratus rankNimbostratus
Dec 17, 2014

It can be anything. Check the logs and look for repeating logs. There can be problems like nodes flapping, OS bug anything.

 

show sys log ltm

 

If you see something fishy open a support case.

 

Muhammad_Irfan1's avatar
Muhammad_Irfan1
Icon for Cirrus rankCirrus
Dec 17, 2014
how to check last logs so that I can check right at that time, command like tail -f. There is command show sys log ltm lines xx.