cciefun ccie/sp fortiOS linux tcl/tk avalanche/reflector canada immi, visit

Conserve mode

3951B-41 (global) # d hardware sysinfo memory
total: used: free: shared: buffers: cached: shm:
Mem: 12717326336 1692008448 11025317888 0 118784 170450944 171618304
Swap: 0 0 0
MemTotal: 12419264 kB
MemFree: 10766912 kB
MemShared: 0 kB
Buffers: 116 kB
Cached: 166456 kB
SwapCached: 0 kB
Active: 113768 kB
Inactive: 52872 kB
HighTotal: 10616832 kB
HighFree: 10320888 kB
LowTotal: 1802432 kB
LowFree: 446024 kB
SwapTotal: 0 kB
SwapFree: 0 kB


1, why FOS went into conserve mode?
Once lowFree is less than 20% LowTotal, the system goes into conserve mode. When lowFree is back to more than 30% LowTotal, leave the conserve mode
When the system is in conserve mode, it will randomly delete the session, bypass av and anything became unpredictable.

The concurrent session = lowTotal * 1024 *80% / 640 (640byte/sesssion)