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Sat May 28 20:57:50 CEST 2011

zwizwa trouble

[10479065.715018] tcpdump: page allocation failure. order:5, mode:0xc0d0
[10479065.715041] Pid: 19342, comm: tcpdump Not tainted 2.6.26-2-vserver-686 #1
[10479065.715094]  [<c01639de>] __alloc_pages_internal+0x33a/0x34e
[10479065.715177]  [<c01639fe>] __alloc_pages+0x7/0x9
[10479065.715198]  [<c0163a0f>] __get_free_pages+0xf/0x1b
[10479065.715262]  [<c02debde>] packet_set_ring+0xcb/0x2db
[10479065.715323]  [<c02dfe27>] packet_setsockopt+0x242/0x300
[10479065.715375]  [<c02dff04>] packet_getsockopt+0x1f/0x103
[10479065.715415]  [<c025bcd8>] sys_setsockopt+0x6f/0x8e
[10479065.715462]  [<c025d4b9>] sys_socketcall+0x15c/0x19e
[10479065.715526]  [<c0103857>] sysenter_past_esp+0x78/0xb1
[10479065.715605]  =======================
[10479065.715616] Mem-info:
[10479065.715627] DMA per-cpu:
[10479065.715638] CPU    0: hi:    0, btch:   1 usd:   0
[10479065.715651] Normal per-cpu:
[10479065.715661] CPU    0: hi:   90, btch:  15 usd:   0
[10479065.715674] Active:29210 inactive:16556 dirty:91 writeback:20 unstable:0
[10479065.715676]  free:11260 slab:3226 mapped:2932 pagetables:529 bounce:0
[10479065.715699] DMA free:9320kB min:124kB low:152kB high:184kB active:748kB inactive:680kB present:16256kB pages_scanned:0 all_unreclaimable? no
[10479065.715718] lowmem_reserve[]: 0 238 238 238
[10479065.715787] Normal free:35720kB min:1908kB low:2384kB high:2860kB active:116092kB inactive:65544kB present:243776kB pages_scanned:0 all_unreclaimable? no
[10479065.715807] lowmem_reserve[]: 0 0 0 0
[10479065.715830] DMA: 484*4kB 321*8kB 165*16kB 50*32kB 9*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 9320kB
[10479065.715918] Normal: 1403*4kB 1002*8kB 577*16kB 268*32kB 65*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 35724kB
[10479065.716040] 22515 total pagecache pages
[10479065.716053] Swap cache: add 21748823, delete 21739952, find 26225400/28917567
[10479065.716067] Free swap  = 704320kB
[10479065.716115] Total swap = 979892kB
[10479065.717998] 65520 pages of RAM
[10479065.718015] 0 pages of HIGHMEM
[10479065.718025] 1516 reserved pages
[10479065.718034] 18241 pages shared
[10479065.718045] 8871 pages swap cached
[10479065.718054] 91 pages dirty
[10479065.718064] 0 pages writeback
[10479065.718073] 2932 pages mapped
[10479065.718083] 3226 pages slab
[10479065.718094] 529 pages pagetables


Memory usage is large for a couple of programs:
103372 /usr/bin/mzscheme
202228 /usr/sbin/clamd
230612 /usr/sbin/apache2
230612 /usr/sbin/apache2

Maybe it's best to kick all these out since they aren't really used
much.  some small http can probably be used instead of of apache, but
FTP is probably enough.

tom@zwizwa:~$ ps aux|grep clamd
clamav   13154  0.0 29.2 202228 75048 ?        Ssl  Jan30 120:09 /usr/sbin/clamd

tom@zwizwa:~$ free
             total       used       free     shared    buffers     cached
Mem:        256144     252088       4056          0      71068      35548
-/+ buffers/cache:     145472     110672
Swap:       979892     310840     669052

tom@zwizwa:~$ ps aux|grep apache
root      2602  0.0  0.1   9200   356 ?        Ss   Jan25   6:46 /usr/sbin/apache2 -k start
root      2606  0.0  0.0   8816   164 ?        Ss   Jan25   1:46 /usr/sbin/htcacheclean -n -d120 -i -p/var/cache/apache2/mod_disk_cache -l300M
www-data 20208  0.0  0.0   8832   156 ?        S    May22   0:00 /usr/sbin/apache2 -k start
www-data 20254  0.0  0.0 230612   168 ?        Sl   May22   0:00 /usr/sbin/apache2 -k start
www-data 20257  0.0  0.0 230612   172 ?        Sl   May22   0:00 /usr/sbin/apache2 -k start



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