Long CPs with high CPU utilization on FlexClone volumes
Applies to
- ONTAP 9.8P7 and later
- ONTAP 9.9.1P13 or lower
- ONTAP 9.10.1
- ONTAP 9.11.1P6 or lower
- Sequential reads performed on FlexClone volumes
Issue
- Long CPs observed
wafl.cp.toolong:error
from event log (EMS) if the CP duration exceeds 30 seconds
SSAN_Ex
orexempt
CPU domain has a high utilization- Run
sysstat -M 1
to monitor the CPU domain util, as illustrated in How to measure CPU utilization SSAN_Ex
orExempt
util being greatly higher thanWAFL_Ex
is a good indicator of abnormally highSSAN_Ex
orExempt
CPU util
- Run
- High latnecy observed