Cgroup limit MongoDB process memory size _mongodb

For example, limit the memory size of the MongoDB.

mkdir/cgroup/memory/test/ 
echo 50M >/cgroup/memory/test/memory.limit_in_bytes 
echo 50M >/cgroup/ Memory/test/memory.memsw.limit_in_bytes 
cgexec-g memory:test mongod-port 27017--bind_ip 127.0.0.1--dbpath/var/ Lib/mongo

After the Cgroup limit is reached, the process is killed when the memory reaches the limit.

[Root@centos mongo]# cgexec-g memory:test mongod-port 27017--bind_ip 127.0.0.1--dbpath/var/lib/mongo 2014-07-18T23: 20:53.228+0800 [Initandlisten] MongoDB starting:pid=2529 port=27017 dbpath=/var/lib/mongo 64-bit host=centos 2014-07-1 8t23:20:53.228+0800 [Initandlisten] db version v2.6.3 2014-07-18t23:20:53.228+0800 [Initandlisten] git version: 255F67A66F9603C59380B2A389E386910BBB52CB 2014-07-18t23:20:53.228+0800 [Initandlisten] Build Info:linux build12.nj1.10gen.cc 2.6.32-431.3.1.el6.x86_64 #1 SMP Fri 3 21:39:27 UTC 2014 x86_64 boost_lib_version=1_49 2014-07-1 8t23:20:53.228+0800 [Initandlisten] Allocator:tcmalloc 2014-07-18t23:20:53.228+0800 [Initandlisten] Options: {net: {b Indip: "127.0.0.1", port:27017}, storage: {dbpath: "/var/lib/mongo"}} 2014-07-18t23:20:53.304+0800 [Initandlisten] J Ournal dir=/var/lib/mongo/journal 2014-07-18t23:20:53.304+0800 [Initandlisten] recover:no journal files present, no rec Overy needed 2014-07-18t23:20:53.374+0800 [InitandlIsten] Waiting for connections on port 27017 2014-07-18t23:20:57.838+0800 [Initandlisten] connection accepted from 127.0. 0.1:36712 #1 (1 connection now OPEN) 2014-07-18t23:21:15.077+0800 [Initandlisten] connection accepted from 127.0.0.1:3671 3 #2 (2 connections now OPEN) 2014-07-18t23:21:52.342+0800 [conn2] getmore test.my_collection cursorid:34538199491 Ntoret urn:0 keyupdates:0 numyields:39 Locks (micros) r:121572 nreturned:95052 reslen:4194299 202ms 2014-07-18t23:21:53.376+ 0800 [Clientcursormon] Mem (MB) res:136 virt:12809 2014-07-18t23:21:53.376+0800 [Clientcursormon] Mapped (incl Journal VI EW): 12508 2014-07-18t23:21:53.376+0800 [Clientcursormon] Connections:2 2014-07-18t23:21:56.790+0800 [CONN2] Getmore Test.my_collection cursorid:34538199491 ntoreturn:0 keyupdates:0 numyields:88 Locks (micros) r:142113 nreturned:95595
 reslen:4194301 244ms killed

Data Query script:

[Root@centos data]# cat mongotestlist.py 
import pymongo 
import time 
 
client = Pymongo. Mongoclient ("localhost", 27017) 
db = client.test 
print db.name 
print db.my_collection for 

item in Db.my_collection.find (): 
  Print Item

Data Insert Script:

[Root@centos data]# cat mongotest2.py 
import pymongo 
import time 

client = Pymongo. Mongoclient ("localhost", 27017) 
db = client.test 
print db.name 
print db.my_collection while 

True : 
  Db.my_collection.save ({time.ctime (): Time.time ()})