Люди знающие, помогите, пожалуйста:
несколько раз в день возникает ошибка httpd: page allocation failure. На апаче висит 10.000 редкопосещаемых сайтов, по нагрузке справляется. А с памятью что-то не так. Сервер CentOS 32bit, ОЗУ 4GB.
/var/log/messages:
Apr 29 08:42:01 ded kernel: [<c045e590>] __alloc_pages+0x2bb/0x2cf
Apr 29 08:42:02 ded kernel: [<c04748f8>] cache_alloc_refill+0x275/0x48a
Apr 29 08:42:02 ded kernel: [<c0474b75>] __kmalloc+0x68/0x72
Apr 29 08:42:02 ded kernel: [<c04914b1>] alloc_fd_array+0x14/0x22
Apr 29 08:42:02 ded kernel: [<c049161c>] expand_files+0xf6/0x300
Apr 29 08:42:02 ded kernel: [<c042452e>] dup_fd+0x142/0x2d4
Apr 29 08:42:02 ded kernel: [<c044d0ea>] audit_alloc+0x99/0x169
Apr 29 08:42:02 ded kernel: [<c04246fd>] copy_files+0x3d/0x54
Apr 29 08:42:02 ded kernel: [<c0424f94>] copy_process+0x4e9/0x127e
Apr 29 08:42:02 ded kernel: [<c0436795>] alloc_pid+0x1d3/0x236
Apr 29 08:42:02 ded kernel: [<c0425f67>] do_fork+0x41/0x168
Apr 29 08:42:02 ded kernel: [<c040318b>] sys_clone+0x28/0x2d
Apr 29 08:42:02 ded kernel: [<c0404f9b>] syscall_call+0x7/0xb
Apr 29 08:42:02 ded kernel: =======================
Apr 29 08:42:02 ded kernel: Mem-info:
Apr 29 08:42:02 ded kernel: DMA per-cpu:
Apr 29 08:42:02 ded kernel: cpu 0 hot: high 0, batch 1 used:0
Apr 29 08:42:02 ded kernel: cpu 0 cold: high 0, batch 1 used:0
Apr 29 08:42:02 ded kernel: cpu 1 hot: high 0, batch 1 used:0
Apr 29 08:42:02 ded kernel: cpu 1 cold: high 0, batch 1 used:0
Apr 29 08:42:02 ded kernel: cpu 2 hot: high 0, batch 1 used:0
Apr 29 08:42:02 ded kernel: cpu 2 cold: high 0, batch 1 used:0
Apr 29 08:42:02 ded kernel: cpu 3 hot: high 0, batch 1 used:0
Apr 29 08:42:02 ded kernel: cpu 3 cold: high 0, batch 1 used:0
Apr 29 08:42:02 ded kernel: cpu 4 hot: high 0, batch 1 used:0
Apr 29 08:42:02 ded kernel: cpu 4 cold: high 0, batch 1 used:0
Apr 29 08:42:02 ded kernel: cpu 5 hot: high 0, batch 1 used:0
Apr 29 08:42:02 ded kernel: cpu 5 cold: high 0, batch 1 used:0
Apr 29 08:42:02 ded kernel: cpu 6 hot: high 0, batch 1 used:0
Apr 29 08:42:02 ded kernel: cpu 6 cold: high 0, batch 1 used:0
Apr 29 08:42:02 ded kernel: cpu 7 hot: high 0, batch 1 used:0
Apr 29 08:42:02 ded kernel: cpu 7 cold: high 0, batch 1 used:0
Apr 29 08:42:02 ded kernel: DMA32 per-cpu: empty
Apr 29 08:42:02 ded kernel: Normal per-cpu:
Apr 29 08:42:02 ded kernel: cpu 0 hot: high 186, batch 31 used:73
Apr 29 08:42:02 ded kernel: cpu 0 cold: high 62, batch 15 used:51
Apr 29 08:42:02 ded kernel: cpu 1 hot: high 186, batch 31 used:21
Apr 29 08:42:02 ded kernel: cpu 1 cold: high 62, batch 15 used:57
Apr 29 08:42:02 ded kernel: cpu 2 hot: high 186, batch 31 used:2
Apr 29 08:42:02 ded kernel: cpu 2 cold: high 62, batch 15 used:50
Apr 29 08:42:02 ded kernel: cpu 3 hot: high 186, batch 31 used:20
Apr 29 08:42:02 ded kernel: cpu 3 cold: high 62, batch 15 used:0
Apr 29 08:42:02 ded kernel: cpu 4 hot: high 186, batch 31 used:18
Apr 29 08:42:02 ded kernel: cpu 4 cold: high 62, batch 15 used:54
Apr 29 08:42:02 ded kernel: cpu 5 hot: high 186, batch 31 used:4
Apr 29 08:42:02 ded kernel: cpu 5 cold: high 62, batch 15 used:61
Apr 29 08:42:02 ded kernel: cpu 6 hot: high 186, batch 31 used:11
Apr 29 08:42:02 ded kernel: cpu 6 cold: high 62, batch 15 used:7
Apr 29 08:42:02 ded kernel: cpu 7 hot: high 186, batch 31 used:10
Apr 29 08:42:02 ded kernel: cpu 7 cold: high 62, batch 15 used:53
Apr 29 08:42:02 ded kernel: HighMem per-cpu:
Apr 29 08:42:02 ded kernel: cpu 0 hot: high 186, batch 31 used:24
Apr 29 08:42:02 ded kernel: cpu 0 cold: high 62, batch 15 used:0
Apr 29 08:42:02 ded kernel: cpu 1 hot: high 186, batch 31 used:13
Apr 29 08:42:02 ded kernel: cpu 1 cold: high 62, batch 15 used:5
Apr 29 08:42:02 ded kernel: cpu 2 hot: high 186, batch 31 used:18
Apr 29 08:42:02 ded kernel: cpu 2 cold: high 62, batch 15 used:7
Apr 29 08:42:02 ded kernel: cpu 3 hot: high 186, batch 31 used:9
Apr 29 08:42:02 ded kernel: cpu 3 cold: high 62, batch 15 used:3
Apr 29 08:42:02 ded kernel: cpu 4 hot: high 186, batch 31 used:12
Apr 29 08:42:02 ded kernel: cpu 4 cold: high 62, batch 15 used:10
Apr 29 08:42:02 ded kernel: cpu 5 hot: high 186, batch 31 used:19
Apr 29 08:42:02 ded kernel: cpu 5 cold: high 62, batch 15 used:9
Apr 29 08:42:02 ded kernel: cpu 6 hot: high 186, batch 31 used:30
Apr 29 08:42:02 ded kernel: cpu 6 cold: high 62, batch 15 used:8
Apr 29 08:42:02 ded kernel: cpu 7 hot: high 186, batch 31 used:15
Apr 29 08:42:02 ded kernel: cpu 7 cold: high 62, batch 15 used:11
Apr 29 08:42:02 ded kernel: Free pages: 2075632kB (1423252kB HighMem)
Apr 29 08:42:02 ded kernel: Active:366655 inactive:90107 dirty:741 writeback:1 unstable:0 free:518908 slab:26921 mapped-file:4748 mapped-anon:232168 pagetables:28603
Apr 29 08:42:02 ded kernel: DMA free:6484kB min:68kB low:84kB high:100kB active:0kB inactive:0kB present:16384kB pages_scanned:0 all_unreclaimable? yes
Apr 29 08:42:02 ded kernel: lowmem_reserve[]: 0 0 880 5104
Apr 29 08:42:02 ded kernel: DMA32 free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
Apr 29 08:42:02 ded kernel: lowmem_reserve[]: 0 0 880 5104
Apr 29 08:42:02 ded kernel: Normal free:645896kB min:3756kB low:4692kB high:5632kB active:45616kB inactive:60012kB present:901120kB pages_scanned:0 all_unreclaimable? no
Apr 29 08:42:02 ded kernel: lowmem_reserve[]: 0 0 0 33792
Apr 29 08:42:02 ded kernel: HighMem free:1423252kB min:512kB low:5020kB high:9532kB active:1421004kB inactive:300416kB present:4325376kB pages_scanned:0 all_unreclaimable? no
Apr 29 08:42:02 ded kernel: lowmem_reserve[]: 0 0 0 0
Apr 29 08:42:02 ded kernel: DMA: 137*4kB 124*8kB 97*16kB 64*32kB 21*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 6484kB
Apr 29 08:42:02 ded kernel: DMA32: empty
Apr 29 08:42:02 ded kernel: Normal: 25682*4kB 22352*8kB 12660*16kB 4062*32kB 495*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 645896kB
Apr 29 08:42:02 ded kernel: HighMem: 48581*4kB 77802*8kB 29093*16kB 4063*32kB 138*64kB 15*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 1423252kB
Apr 29 08:42:02 ded kernel: 242933 pagecache pages
Apr 29 08:42:02 ded kernel: Swap cache: add 871329, delete 852203, find 66471967/66535621, race 0+73
Apr 29 08:42:02 ded kernel: Free swap = 3695056kB
Apr 29 08:42:02 ded kernel: Total swap = 4192956kB
Apr 29 08:42:02 ded kernel: Free swap: 3695056kB
Apr 29 08:42:02 ded kernel: 1310720 pages of RAM
Apr 29 08:42:02 ded kernel: 1081344 pages of HIGHMEM
Apr 29 08:42:02 ded kernel: 276021 reserved pages
Apr 29 08:42:02 ded kernel: 11033774 pages shared
Apr 29 08:42:02 ded kernel: 19126 pages swap cached
Apr 29 08:42:02 ded kernel: 741 pages dirty
Apr 29 08:42:02 ded kernel: 1 pages writeback
Apr 29 08:42:02 ded kernel: 4748 pages mapped
Apr 29 08:42:02 ded kernel: 26921 pages slab
Apr 29 08:42:02 ded kernel: 28603 pages pagetables
в httpd.conf прописал:
<IfModule prefork.c>
StartServers 8
MinSpareServers 20
MaxSpareServers 25
ServerLimit 100
MaxClients 100
MaxRequestsPerChild 500
</IfModule>
при старте процессы апача съедают 500МБ и во время работы эти особо не растут:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1903 apache 15 0 541m 450m 4512 S 0.0 11.1 0:09.32 /usr/sbin/httpd
1902 apache 22 0 540m 449m 4296 S 0.0 11.1 0:16.19 /usr/sbin/httpd
....