cgroup限制mongodb进程内存大小
以限制mongodb的内存大小为例。
mkdir/cgroup/memory/test/ echo50M>/cgroup/memory/test/memory.limit_in_bytes echo50M>/cgroup/memory/test/memory.memsw.limit_in_bytes cgexec-gmemory:testmongod-port27017--bind_ip127.0.0.1--dbpath/var/lib/mongo
通过cgroup限制后，当内存达到限额，进程会被kill。
[root@centosmongo]#cgexec-gmemory:testmongod-port27017--bind_ip127.0.0.1--dbpath/var/lib/mongo
2014-07-18T23:20:53.228+0800[initandlisten]MongoDBstarting:pid=2529port=27017dbpath=/var/lib/mongo64-bithost=centos
2014-07-18T23:20:53.228+0800[initandlisten]dbversionv2.6.3
2014-07-18T23:20:53.228+0800[initandlisten]gitversion:255f67a66f9603c59380b2a389e386910bbb52cb
2014-07-18T23:20:53.228+0800[initandlisten]buildinfo:Linuxbuild12.nj1.10gen.cc2.6.32-431.3.1.el6.x86_64#1SMPFriJan321:39:27UTC2014x86_64BOOST_LIB_VERSION=1_49
2014-07-18T23:20:53.228+0800[initandlisten]allocator:tcmalloc
2014-07-18T23:20:53.228+0800[initandlisten]options:{net:{bindIp:"127.0.0.1",port:27017},storage:{dbPath:"/var/lib/mongo"}}
2014-07-18T23:20:53.304+0800[initandlisten]journaldir=/var/lib/mongo/journal
2014-07-18T23:20:53.304+0800[initandlisten]recover:nojournalfilespresent,norecoveryneeded
2014-07-18T23:20:53.374+0800[initandlisten]waitingforconnectionsonport27017
2014-07-18T23:20:57.838+0800[initandlisten]connectionacceptedfrom127.0.0.1:36712#1(1connectionnowopen)
2014-07-18T23:21:15.077+0800[initandlisten]connectionacceptedfrom127.0.0.1:36713#2(2connectionsnowopen)
2014-07-18T23:21:52.342+0800[conn2]getmoretest.my_collectioncursorid:34538199491ntoreturn:0keyUpdates:0numYields:39locks(micros)r:121572nreturned:95052reslen:4194299202ms
2014-07-18T23:21:53.376+0800[clientcursormon]mem(MB)res:136virt:12809
2014-07-18T23:21:53.376+0800[clientcursormon]mapped(incljournalview):12508
2014-07-18T23:21:53.376+0800[clientcursormon]connections:2
2014-07-18T23:21:56.790+0800[conn2]getmoretest.my_collectioncursorid:34538199491ntoreturn:0keyUpdates:0numYields:88locks(micros)r:142113nreturned:95595reslen:4194301244ms
Killed
数据查询脚本：
[root@centosdata]#catmongotestList.py
importpymongo
importtime
client=pymongo.MongoClient("localhost",27017)
db=client.test
printdb.name
printdb.my_collection
foritemindb.my_collection.find():
printitem
数据插入脚本：
[root@centosdata]#catmongotest2.py
importpymongo
importtime
client=pymongo.MongoClient("localhost",27017)
db=client.test
printdb.name
printdb.my_collection
whileTrue:
db.my_collection.save({time.ctime():time.time()})