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

David_Pascual_1's avatar
David_Pascual_1
Icon for Nimbostratus rankNimbostratus
Oct 14, 2014

High CPU load during backup

Hi,   I have BIG-IP-LTM 2000 with 11.5.1 version. When I do a system backup ("save sys ucs" command or through graphical User Interface), I get high CPU load for 40 minutes:     I'd lik...
backup
shaggy's avatar
shaggy
Icon for Nimbostratus rankNimbostratus
Oct 14, 2014

What process does "top" show with the highest CPU utilization when creating the UCS?

 

If it's the csyncd process, it could be ID 424931 (search for the ID on https://support.f5.com/kb/en-us/products/big-ip_ltm/releasenotes/product/relnote-ltm-11-4-1.html), which is fixed in 11.6.0.

 

ID 424931 - Upon the creation of a large file, such as a UCS archive, csyncd can raise the CPU utilization of a system for an extended period of time. Create a large file in a directory monitored by csyncd (see /etc/csyncd.conf). Increased CPU utilization can lead to system instability. Workaround: None.