linux user group brescia

Ciao ragazzi, ho da porvi un quesito :)

sto riscontrando anomalie su una macchina sulla quale periodicamente 
(non ad intervalli regolari ma comunque più volte al giorno) si inchioda 
dansguardian, gli utenti non riescono più a navigare e devo restartare i 
servizi.

guardando un po' i log ho notato questa cosa nel /var/log/messages che 
non avevo mai visto

Feb 19 10:41:01  kernel: lowmem_reserve[]: 0 0 0 0
Feb 19 10:41:01  kernel: DMA: 0*4kB 0*8kB 0*16kB 1*32kB 1*64kB 1*128kB 
1*256kB 1*512kB 1*1024kB 1*2048kB 0*4096kB = 4064kB
Feb 19 10:41:01  kernel: DMA32: empty
Feb 19 10:41:01  kernel: Normal: 0*4kB 16*8kB 2*16kB 1*32kB 1*64kB 
1*128kB 0*256kB 0*512kB 1*1024kB 1*2048kB 1*4096kB = 7552kB
Feb 19 10:41:01  kernel: HighMem: 0*4kB 3*8kB 0*16kB 1*32kB 1*64kB 
0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 120kB
Feb 19 10:41:01  kernel: Swap cache: add 285101, delete 284998, find 
28825/31956, race 0+535
Feb 19 10:41:01  kernel: Free swap  = 0kB
Feb 19 10:41:01  kernel: Total swap = 1052248kB
Feb 19 10:41:01  kernel: Free swap:            0kB
Feb 19 10:41:01  kernel: 260032 pages of RAM
Feb 19 10:41:01  kernel: 30656 pages of HIGHMEM
Feb 19 10:41:01  kernel: 2957 reserved pages
Feb 19 10:41:01  kernel: 18781 pages shared
Feb 19 10:41:01  kernel: 103 pages swap cached
Feb 19 10:41:01  kernel: 0 pages dirty
Feb 19 10:41:01  kernel: 0 pages writeback
Feb 19 10:41:01  kernel: 1036 pages mapped
Feb 19 10:41:01  kernel: 3333 pages slab
Feb 19 10:41:01  kernel: 1155 pages pagetables
Feb 19 10:41:01  kernel: oom-killer: gfp_mask=0x201d2, order=0
Feb 19 10:41:01  kernel: [<c014456f>] out_of_memory+0x25/0x13a
Feb 19 10:41:01  kernel: [<c01459d8>] __alloc_pages+0x1f5/0x275
Feb 19 10:41:01  kernel: [<c0146b87>] __do_page_cache_readahead+0xc8/0x1e8
Feb 19 10:41:01  kernel: [<c027f894>] io_schedule+0x26/0x30
Feb 19 10:41:01  kernel: [<c027fab0>] __wait_on_bit_lock+0x4b/0x52
Feb 19 10:41:01  kernel: [<c0141771>] __lock_page+0x51/0x57
Feb 19 10:41:01  kernel: [<c0143c81>] filemap_nopage+0x15b/0x312
Feb 19 10:41:01  kernel: [<c014c144>] __handle_mm_fault+0x26e/0x740
Feb 19 10:41:01  kernel: [<c012465f>] do_gettimeofday+0x31/0xce
Feb 19 10:41:01  kernel: [<c01154b6>] do_page_fault+0x18a/0x481
Feb 19 10:41:01  kernel: [<c011532c>] do_page_fault+0x0/0x481
Feb 19 10:41:01  kernel: [<c01037f9>] error_code+0x39/0x40
Feb 19 10:41:01  kernel: Mem-info:
Feb 19 10:41:01  kernel: DMA per-cpu:
Feb 19 10:41:01  kernel: cpu 0 hot: high 0, batch 1 used:0
Feb 19 10:41:01  kernel: cpu 0 cold: high 0, batch 1 used:0
Feb 19 10:41:01  kernel: cpu 1 hot: high 0, batch 1 used:0
Feb 19 10:41:01  kernel: cpu 1 cold: high 0, batch 1 used:0
Feb 19 10:41:01  kernel: DMA32 per-cpu: empty
Feb 19 10:41:01  kernel: Normal per-cpu:
Feb 19 10:41:01  kernel: cpu 0 hot: high 186, batch 31 used:43
Feb 19 10:41:01  kernel: cpu 0 cold: high 62, batch 15 used:18
Feb 19 10:41:01  kernel: cpu 1 hot: high 186, batch 31 used:19
Feb 19 10:41:01  kernel: cpu 1 cold: high 62, batch 15 used:59
Feb 19 10:41:01  kernel: HighMem per-cpu:
Feb 19 10:41:01  kernel: cpu 0 hot: high 42, batch 7 used:3
Feb 19 10:41:01  kernel: cpu 0 cold: high 14, batch 3 used:12
Feb 19 10:41:01  kernel: cpu 1 hot: high 42, batch 7 used:19
Feb 19 10:41:01  kernel: cpu 1 cold: high 14, batch 3 used:10
Feb 19 10:41:01  kernel: Free pages:       11736kB (120kB HighMem)
Feb 19 10:41:01  kernel: Active:126246 inactive:121656 dirty:0 
writeback:0 unstable:0 free:2934 slab:3333 mapped:1036 pagetables:1155

secondo voi può essere correlato? di fatto che significa? che la 
macchina è con un piede nella fossa? qualche guasto hardware?

help \o/

Grazie a tutti

Francesco.