Device failed over to standby box

dears,

 

suddenly i found that my F5 failed over to standby box and when i searched the logs i found the foolowing logs before failover:-

 

NoticeBIGIPHQExternal notice apmd[11146]: 01490260:5: Device HA state transitioned from ACTIVE to STANDBY

 

WarningBIGIPHQExternal warning kernel: active_anon:1009147 inactive_anon:154167 isolated_anon:0 06/02/40 05:21:31 م10.0.20.39WarningBIGIPHQExternal warning kernel: active_file:334 inactive_file:6090 isolated_file:0

 

WarningBIGIPHQExternal warning kernel: Node 0 DMA free:15896kB min:68kB low:84kB high:100kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15296kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes

 

WarningBIGIPHQExternal warning kernel: Node 0 DMA32 free:58916kB min:16164kB low:20204kB high:24244kB active_anon:2068164kB inactive_anon:414128kB active_file:1336kB inactive_file:23844kB unevictable:552008kB isolated(anon):0kB isolated(file):0kB present:3596500kB mlocked:552008kB dirty:16kB writeback:0kB mapped:562636kB shmem:546968kB slab_reclaimable:6628kB slab_unreclaimable:10060kB kernel_stack:944kB pagetables:12612kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:5280 all_unreclaimable? yes

 

WarningBIGIPHQExternal warning kernel: Node 0 Normal free:49240kB min:49296kB low:61620kB high:73944kB active_anon:1968424kB inactive_anon:202540kB active_file:0kB inactive_file:516kB unevictable:199628kB isolated(anon):0kB isolated(file):0kB present:10966580kB mlocked:199628kB dirty:0kB writeback:0kB mapped:206020kB shmem:90792kB slab_reclaimable:12148kB slab_unreclaimable:58192kB kernel_stack:5456kB pagetables:19928kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:193 all_unreclaimable? yes

 

is these logs related to failover or what made the device failing over???

 

notice that there is no load on this box !!!!!!