Cisco FirePower FMC GUI - Warning "High Disk Space Utilization"

[Lamin]

Hi all,

We have an FMC appliance deployed in VMWare for managing FTD clusters. However, the system intermittently displays the following warning "High Disk Space Utilization". In general, FMC GUI can take up to 30 seconds to load when you log in and reloads equally take longer too.

After several search online, I found a resource on https://www.speaknetworks.com/cisco-firepower-high-disk-space-utilization/, Through this guidance, I have been able to query the appliance to verify disk volumes usage (see below)

File System	Type	Size	Used	Available	Used %	Mounted on
/dev/sda5	ext4	3.9G	1.5G	2.2G	41%	/
none	devtmpfs	17G	32M	17G	1%	/dev
/dev/sda1	ext4	91M	38M	47M	45%	/boot
/dev/sda7	ext4	256G	35G	208G	15%	/var
none	tmpfs	17G	177K	17G	1%	/dev/shm
tmpfs	tmpfs	17G	0	17G	0%	/sys/fs/cgroup
tmpfs	tmpfs	17G	0	17G	0%	/sys/fs/cgroup/pm

As mentioned on the website, "The system generates warning when any directory is 85% utilized and critical when it reaches 90%." As you can see on the attached image, none of the volumes exceed that level. 

I thought I'd post this here to get your views or if you may have come across a similar issue in the past

[Marvin Rhoads]

There have been some bugs filed around that warning - it's not always accurate or true.

FMC performance is generally greatly improved since version 6.6+. They totally swapped out the underlying databases to use MonetDB and also increased the VM memory requirement to 28 GB (32 GB recommended).