AP free file system space less than limit 90.0 percent

Mar 31 16:00:01 2019: AP-b : %DIAG-4-FREE_RAM_DISK: Free system: file system space, 2.4% is less than limit 90.0%
Mar 31 15:59:53 2019: AP-a : %DIAG-4-FREE_RAM_DISK: Free system: file system space, 3.5% is less than limit 90.0%
Mar 31 15:59:46 2019: AP-a : %DIAG-4-FREE_RAM_DISK: Free system: file system space, 0.8% is less than limit 90.0%
Mar 31 15:59:16 2019: AP-a : %DIAG-4-FREE_RAM_DISK: Free system: file system space, 2.8% is less than limit 90.0%

• Extreme Wireless
• Extreme Wireless WiNG
• WiNG version 5.X
• AP4600

Filesystem                Size      Used Available Use% Mounted on
/dev/root                41.5M     35.2M      6.3M  85% /
/dev/ram                  5.0M      4.9M     60.0K  99% /var
/dev/ram                  1.0M         0      1.0M   0% /var/radius
/dev/ram                  5.0M      4.9M     60.0K  99% /tmp
/dev/ram                  5.0M      4.9M     60.0K  99% /dev
none                    512.0K         0    512.0K   0% /dev/shm
none                    512.0K         0    512.0K   0% /dev/shm
/dev/mtdblock8            7.0M    580.0K      6.4M   8% /var2
/dev/mtdblock9           10.0M    552.0K      9.5M   5% /etc2
/dev/mtdblock10          28.0M      1.0M     27.0M   4% /flash
/dev/ram                  2.0M      1.6M    420.0K  79% /var/log
/dev/ram                  2.0M      1.6M    420.0K  79% /flash/log
/dev/ram                  1.0M         0      1.0M   0% /flash/log/radius
/dev/mtdblock10          28.0M      1.0M     27.0M   4% /usr/hotspot/htdocs
/dev/root                41.5M     35.2M      6.3M  85% /usr/hotspot/htdocs/cgi-bin
/dev/ram                  5.0M      4.9M     60.0K  99% /usr/hotspot/var/etc/tzone
/dev/root                41.5M     35.2M      6.3M  85% /usr/hotspot/usr/share/zoneinfo
/dev/mtdblock7           41.5M     39.8M      1.7M  96% /mnt/other