启动了非常多的进程。然后重新启动服务器，数据库就消失了。当我走进rockmongo的时候，还没有看到旧的数据库。有一个新的数据库管理员，仅此而已。
db.serverStatus()
{
"host" : "host",
"version" : "2.0.6",
"process" : "mongod",
"uptime" : 1041,
"uptimeEstimate" : 1037,
"localTime" : ISODate("2012-07-26T08:20:40.729Z"),
"globalLock" : {
"totalTime" : 1041408230,
"lockTime" : 330771,
"ratio" : 0.0003176189610101314,
"currentQueue" : {
"total" : 0,
"readers" : 0,
"writers" : 0
},
"activeClients" : {
"total" : 0,
"readers" : 0,
"writers" : 0
}
},
"mem" : {
"bits" : 64,
"resident" : 19,
"virtual" : 114,
"supported" : true,
"mapped" : 0,
"mappedWithJournal" : 0
},
"connections" : {
"current" : 11,
"available" : 808
},
"extra_info" : {
"note" : "fields vary by platform",
"heap_usage_bytes" : 3623360,
"page_faults" : 2
},
"indexCounters" : {
"btree" : {
"accesses" : 0,
"hits" : 0,
"misses" : 0,
"resets" : 0,
"missRatio" : 0
}
},
"backgroundFlushing" : {
"flushes" : 17,
"total_ms" : 0,
"average_ms" : 0,
"last_ms" : 0,
"last_finished" : ISODate("2012-07-26T08:20:19.341Z")
},
"cursors" : {
"totalOpen" : 0,
"clientCursors_size" : 0,
"timedOut" : 0
},
"network" : {
"bytesIn" : 4429,
"bytesOut" : 14192,
"numRequests" : 56
},
"opcounters" : {
"insert" : 0,
"query" : 22,
"update" : 0,
"delete" : 0,
"getmore" : 0,
"command" : 54
},
"asserts" : {
"regular" : 0,
"warning" : 14,
"msg" : 0,
"user" : 0,
"rollovers" : 0
},
"writeBacksQueued" : false,
"dur" : {
"commits" : 29,
"journaledMB" : 0,
"writeToDataFilesMB" : 0,
"compression" : 0,
"commitsInWriteLock" : 0,
"earlyCommits" : 0,
"timeMs" : {
"dt" : 3045,
"prepLogBuffer" : 0,
"writeToJournal" : 0,
"writeToDataFiles" : 0,
"remapPrivateView" : 0
}
},
"ok" : 1
}
mongodb.log
{
"assertion" : "file /var/lib/mongodb/baza.4 open/create failed in create PrivateMap (look in log for more information)",
"assertionCode" : 13636,
"errmsg" : "db assertion failure",
"ok" : 0
}
Thu Jul 26 12:05:44 [conn5] ERROR: mmap private failed with out of memory. (64 bit build)
Thu Jul 26 12:05:44 [conn5] Assertion: 13636:file /var/lib/mongodb/baza.4 open/create failed in createPrivateMap (look in log for more information)
0x5848a2 0x75dcea 0x75e8e3 0x8a8c3b 0x8a0962 0x8a1d03 0x8a1fda 0x8a2835 0x898619 0x898ea3 0x982bd5 0x97c4f4 0x97dbfd 0x940f05 0x943a30 0x889107 0x88dcd9 0xaa0bc8 0x6389f7 0x2b76122978ca
/usr/bin/mongod(_ZN5mongo11msgassertedEiPKc+0x112) [0x5848a2]
/usr/bin/mongod(_ZN5mongo8MongoMMF13finishOpeningEv+0x1ca) [0x75dcea]
/usr/bin/mongod(_ZN5mongo8MongoMMF6createESsRyb+0x63) [0x75e8e3]
/usr/bin/mongod(_ZN5mongo13MongoDataFile4openEPKcib+0x14b) [0x8a8c3b]
/usr/bin/mongod(_ZN5mongo8Database7getFileEiib+0x102) [0x8a0962]
/usr/bin/mongod(_ZN5mongo8Database12openAllFilesEv+0x33) [0x8a1d03]
/usr/bin/mongod(_ZN5mongo8DatabaseC1EPKcRbRKSs+0x1ca) [0x8a1fda]
/usr/bin/mongod(_ZN5mongo14DatabaseHolder11getOrCreateERKSsS2_Rb+0x605) [0x8a2835]
/usr/bin/mongod(_ZN5mongo6Client7Context11_finishInitEb+0x2e9) [0x898619]
/usr/bin/mongod(_ZN5mongo6Client7ContextC1ERKSsSsPNS_9mongolockEb+0x73) [0x898ea3]
/usr/bin/mongod(_ZN5mongo16CmdListDatabases3runERKSsRNS_7BSONObjEiRSsRNS_14BSONObjBuilderEb+0x215) [0x982bd5]
/usr/bin/mongod(_ZN5mongo11execCommandEPNS_7CommandERNS_6ClientEiPKcRNS_7BSONObjERNS_14BSONObjBuilderEb+0x6c4) [0x97c4f4]
/usr/bin/mongod(_ZN5mongo12_runCommandsEPKcRNS_7BSONObjERNS_11_BufBuilderINS_16TrivialAllocatorEEERNS_14BSONObjBuilderEbi+0x6fd) [0x97dbfd]
/usr/bin/mongod(_ZN5mongo11runCommandsEPKcRNS_7BSONObjERNS_5CurOpERNS_11_BufBuilderINS_16TrivialAllocatorEEERNS_14BSONObjBuilderEbi+0x35) [0x940f05]
/usr/bin/mongod(_ZN5mongo8runQueryERNS_7MessageERNS_12QueryMessageERNS_5CurOpES1_+0x1740) [0x943a30]
/usr/bin/mongod() [0x889107]
/usr/bin/mongod(_ZN5mongo16assembleResponseERNS_7MessageERNS_10DbResponseERKNS_11HostAndPortE+0x559) [0x88dcd9]
/usr/bin/mongod(_ZN5mongo16MyMessageHandler7processERNS_7MessageEPNS_21AbstractMessagingPortEPNS_9LastErrorE+0x78) [0xaa0bc8]
/usr/bin/mongod(_ZN5mongo3pms9threadRunEPNS_13MessagingPortE+0x287) [0x6389f7]
/lib/libpthread.so.0(+0x68ca) [0x2b76122978ca]
Thu Jul 26 12:05:52 [initandlisten] connection accepted from 127.0.0.1:41970 #11
~# 免费 -ltm
total used free shared buffers cached
Mem: 1400 196 1203 0 0 0
Low: 1400 196 1203
High: 0 0 0
-/+ buffers/cache: 196 1203
Swap: 0 0 0
Total: 1400 196 1203
~# cat /proc/sys/vm/overcommit_memory
0
~# cat /proc/sys/vm/overcommit_ratio
50
~# ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 16382
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) unlimited
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
UPD： 解决方案：禁用日志。