Hi.
I searched help from several months ago with no success.
So I'll repeat again my problem hoping that this time someone will answer.
I often (3 times in a month) control of my virtual server, so I have to
call the provider to soft-reset it.
The problem is that apache takes all the memory and the cpu usage of the
server, and sometimes after that I have also kernel panic errors.
Even with the server working, I have the apache2 daemons big from 30 to
50 megabytes each one (now I use 9).
In the logs I found stuff like this:
Feb 28 12:54:09 utopia kernel: [408986.594006] apache2 invoked
oom-killer: gfp_mask=0x1201d2, order=0, oomkilladj=0
Feb 28 12:54:09 utopia kernel: [408986.594022] Pid: 6817, comm: apache2
Not tainted 2.6.28-18-server #59-Ubuntu
Feb 28 12:54:09 utopia kernel: [408986.594026] Call Trace:
Feb 28 12:54:09 utopia kernel: [408986.594080] [<ffffffff802b3825>]
oom_kill_process+0x95/0x240
Feb 28 12:54:09 utopia kernel: [408986.594087] [<ffffffff802b3fdf>] ?
select_bad_process+0xef/0x130
Feb 28 12:54:09 utopia kernel: [408986.594091] [<ffffffff802b40d4>]
out_of_memory+0xb4/0x150
Feb 28 12:54:09 utopia kernel: [408986.594095] [<ffffffff802b6c49>]
__alloc_pages_internal+0x4a9/0x4f0
Feb 28 12:54:09 utopia kernel: [408986.594101] [<ffffffff802b9a7a>]
__do_page_cache_readahead+0xda/0x210
Feb 28 12:54:09 utopia kernel: [408986.594105] [<ffffffff802b9c0e>]
do_page_cache_readahead+0x5e/0x90
Feb 28 12:54:09 utopia kernel: [408986.594108] [<ffffffff802b201a>]
filemap_fault+0x34a/0x430
Feb 28 12:54:09 utopia kernel: [408986.594113] [<ffffffff802c6010>]
__do_fault+0x50/0x520
Feb 28 12:54:09 utopia kernel: [408986.594117] [<ffffffff802c7199>]
handle_mm_fault+0x1e9/0x470
Feb 28 12:54:09 utopia kernel: [408986.594134] [<ffffffff802f3a1f>] ?
path_walk+0xbf/0xd0
Feb 28 12:54:09 utopia kernel: [408986.594158] [<ffffffff8022f669>] ?
default_spin_lock_flags+0x9/0x10
Feb 28 12:54:09 utopia kernel: [408986.594177] [<ffffffff8069e0d7>]
do_page_fault+0x307/0x780
Feb 28 12:54:09 utopia kernel: [408986.594183] [<ffffffff802eb9f3>] ?
cp_new_stat+0xe3/0xf0
Feb 28 12:54:09 utopia kernel: [408986.594186] [<ffffffff802ebee6>] ?
sys_newstat+0x36/0x50
Feb 28 12:54:09 utopia kernel: [408986.594198] [<ffffffff8069b6ba>]
error_exit+0x0/0x70
Feb 28 12:54:09 utopia kernel: [408986.594202] Mem-Info:
Feb 28 12:54:09 utopia kernel: [408986.594205] DMA per-cpu:
Feb 28 12:54:09 utopia kernel: [408986.594207] CPU 0: hi: 0,
btch: 1 usd: 0
Feb 28 12:54:09 utopia kernel: [408986.594210] CPU 1: hi: 0,
btch: 1 usd: 0
Feb 28 12:54:09 utopia kernel: [408986.594212] DMA32 per-cpu:
Feb 28 12:54:09 utopia kernel: [408986.594214] CPU 0: hi: 186,
btch: 31 usd: 183
Feb 28 12:54:09 utopia kernel: [408986.594216] CPU 1: hi: 186,
btch: 31 usd: 172
Feb 28 12:54:09 utopia kernel: [408986.594226] Active_anon:363780
active_file:19 inactive_anon:121250
Feb 28 12:54:09 utopia kernel: [408986.594228] inactive_file:91
unevictable:0 dirty:0 writeback:0 unstable:0
Feb 28 12:54:09 utopia kernel: [408986.594229] free:3066 slab:4774
mapped:1 pagetables:7473 bounce:0
Feb 28 12:54:09 utopia kernel: [408986.594234] DMA free:6644kB min:12kB
low:12kB high:16kB active_anon:0kB inactive_anon:0kB acti$
Feb 28 12:54:09 utopia kernel: [408986.594237] lowmem_reserve[]: 0 2004
2004 2004
Feb 28 12:54:09 utopia kernel: [408986.594244] DMA32 free:5620kB
min:5720kB low:7148kB high:8580kB active_anon:1455120kB inactive$
Feb 28 12:54:09 utopia kernel: [408986.594247] lowmem_reserve[]: 0 0 0 0
Feb 28 12:54:09 utopia kernel: [408986.594259] DMA: 3*4kB 3*8kB 3*16kB
3*32kB 3*64kB 1*128kB 2*256kB 1*512kB 1*1024kB 0*2048kB 1*$
Feb 28 12:54:09 utopia kernel: [408986.594272] DMA32: 155*4kB 1*8kB
0*16kB 0*32kB 0*64kB 1*128kB 1*256kB 1*512kB 0*1024kB 0*2048k$
Feb 28 12:54:09 utopia kernel: [408986.594284] 828 total pagecache pages
Feb 28 12:54:09 utopia kernel: [408986.594286] 0 pages in swap cache
Feb 28 12:54:09 utopia kernel: [408986.594288] Swap cache stats: add
4551, delete 4551, find 160864/160937
Feb 28 12:54:09 utopia kernel: [408986.594297] Free swap = 0kB
Feb 28 12:54:09 utopia kernel: [408986.594299] Total swap = 0kB
Feb 28 12:54:09 utopia kernel: [408986.608274] 524272 pages RAM
Feb 28 12:54:09 utopia kernel: [408986.608283] 15596 pages reserved
Feb 28 12:54:09 utopia kernel: [408986.608284] 63040 pages shared
Feb 28 12:54:09 utopia kernel: [408986.608286] 500299 pages non-shared
Feb 28 12:54:09 utopia kernel: [408986.608292] Out of memory: kill
process 6817 (apache2) score 63892 or a child
Feb 28 12:54:09 utopia kernel: [408986.609426] Killed process 6817 (apache2)
Feb 28 12:54:17 utopia kernel: [409094.110911] pickup invoked
oom-killer: gfp_mask=0x1201d2, order=0, oomkilladj=0
Feb 28 12:54:17 utopia kernel: [409094.110925] Pid: 5668, comm: pickup
Not tainted 2.6.28-18-server #59-Ubuntu
Feb 28 12:54:17 utopia kernel: [409094.110929] Call Trace:
(and so on)
This is my configuration:
Linux utopia 2.6.28-18-server #59-Ubuntu SMP Thu Jan 28 02:25:03 UTC
2010 x86_64 GNU/Linux
Server version: Apache/2.2.11 (Ubuntu)
Server built: Nov 13 2009 22:06:57
Server's Module Magic Number: 20051115:21
Server loaded: APR 1.2.12, APR-Util 1.2.12
Compiled using: APR 1.2.12, APR-Util 1.2.12
Architecture: 64-bit
Server MPM: Prefork
threaded: no
forked: yes (variable process count)
Server compiled with....
-D APACHE_MPM_DIR="server/mpm/prefork"
-D APR_HAS_SENDFILE
-D APR_HAS_MMAP
-D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
-D APR_USE_SYSVSEM_SERIALIZE
-D APR_USE_PTHREAD_SERIALIZE
-D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
-D APR_HAS_OTHER_CHILD
-D AP_HAVE_RELIABLE_PIPED_LOGS
-D DYNAMIC_MODULE_LIMIT=128
-D HTTPD_ROOT=""
-D SUEXEC_BIN="/usr/lib/apache2/suexec"
-D DEFAULT_PIDLOG="/var/run/apache2.pid"
-D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
-D DEFAULT_LOCKFILE="/var/run/apache2/accept.lock"
-D DEFAULT_ERRORLOG="logs/error_log"
-D AP_TYPES_CONFIG_FILE="/etc/apache2/mime.types"
-D SERVER_CONFIG_FILE="/etc/apache2/apache2.conf"
This is the main configuration of apache2:
<IfModule mpm_prefork_module>
StartServers 5
MinSpareServers 5
MaxSpareServers 9
MaxClients 80
MaxRequestsPerChild 400
MaxMemFree 200000
</IfModule>
KeepAliveTimeout 3
MaxKeepAliveRequests 50
KeepAlive On
Timeout 200
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