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    paulwong
    

    

    



    
	
					
	
    
		
    
			mongodb最大連接數(shù)修改
		
    
		在Linux平臺(tái)下，無(wú)論是64位或者32位的MongoDB默認(rèn)最大連接數(shù)都是819，WIN平臺(tái)不知道，估計(jì)也沒(méi)有人在 WIN平臺(tái)下使用MongoDB做生產(chǎn)環(huán)境

    [root@DELL113 mongodb-linux-i686-2.4.1]# ./bin/mongo 192.168.6.42
    MongoDB shell version: 2.4.1
    connecting to: 192.168.6.42/test
    > db.serverStatus().connections
    { "current" : 1, "available" : 818, "totalCreated" : NumberLong(1) }
    途中available顯示818少了一個(gè)，表示空閑的。current表示已經(jīng)占用了的連接數(shù)，兩數(shù)一加就等于819，如果我現(xiàn)在在連接一個(gè)，那么available就是817，current就是2

    [root@DELL113 mongodb-linux-i686-2.4.1]# ./bin/mongo 192.168.6.42
    MongoDB shell version: 2.4.1
    connecting to: 192.168.6.42/test
    > db.serverStatus().connections
    { "current" : 1, "available" : 818, "totalCreated" : NumberLong(1) }
    > db.serverStatus().connections
    { "current" : 2, "available" : 817, "totalCreated" : NumberLong(2) }
    819個(gè)連接數(shù)對(duì)于一般的站點(diǎn)我認(rèn)為已經(jīng)夠用，并且都是現(xiàn)連現(xiàn)取現(xiàn)斷。但這個(gè)連接數(shù)也可以修改，只要在啟動(dòng)的時(shí)候加入--maxConns即可

    服務(wù)器啟動(dòng)

    [root@lee mongodb-linux-x86_64-2.4.1]# ./bin/mongod --dbpath=/root/db --maxConns=2000
    Wed Apr 3 11:06:21.905 [initandlisten] MongoDB starting : pid=2812 port=27017 dbpath=/root/db 64-bit host=lee
    Wed Apr 3 11:06:21.957 [initandlisten] db version v2.4.1
    Wed Apr 3 11:06:21.957 [initandlisten] git version: 1560959e9ce11a693be8b4d0d160d633eee75110
    Wed Apr 3 11:06:21.957 [initandlisten] build info: Linux ip-10-2-29-40 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1_49
    Wed Apr 3 11:06:21.957 [initandlisten] allocator: tcmalloc
    Wed Apr 3 11:06:21.957 [initandlisten] options: { dbpath: "/root/db", maxConns: 2000 }
    Wed Apr 3 11:06:21.982 [initandlisten] journal dir=/root/db/journal
    Wed Apr 3 11:06:21.982 [initandlisten] recover : no journal files present, no recovery needed
    Wed Apr 3 11:06:22.297 [initandlisten] preallocateIsFaster=true 2.62
    Wed Apr 3 11:06:22.717 [initandlisten] --maxConns too high, can only handle 819
    Wed Apr 3 11:06:22.724 [initandlisten] waiting for connections on port 27017
    Wed Apr 3 11:06:22.725 [websvr] admin web console waiting for connections on port 28017
    Wed Apr 3 11:06:25.126 [initandlisten] connection accepted from 192.168.4.86:53917 #1 (1 connection now open)
    查詢最大連接數(shù)

    [root@DELL113 mongodb-linux-i686-2.4.1]# ./bin/mongo 192.168.6.42
    MongoDB shell version: 2.4.1
    connecting to: 192.168.6.42/test
    > db.serverStatus().connections
    { "current" : 1, "available" : 818, "totalCreated" : NumberLong(1) }
    > 
    發(fā)現(xiàn)還是819？其實(shí)是Linux默認(rèn)進(jìn)程能打開(kāi)最大文件數(shù)有關(guān)，可以通過(guò)ulimit 解決

    [root@lee mongodb-linux-x86_64-2.4.1]# ulimit -n 2500
    [root@lee mongodb-linux-x86_64-2.4.1]# ./bin/mongod --dbpath=/root/db --maxConns=2000
    Wed Apr 3 11:11:07.013 [initandlisten] MongoDB starting : pid=2930 port=27017 dbpath=/root/db 64-bit host=lee
    Wed Apr 3 11:11:07.013 [initandlisten] db version v2.4.1
    Wed Apr 3 11:11:07.013 [initandlisten] git version: 1560959e9ce11a693be8b4d0d160d633eee75110
    Wed Apr 3 11:11:07.013 [initandlisten] build info: Linux ip-10-2-29-40 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1_49
    Wed Apr 3 11:11:07.013 [initandlisten] allocator: tcmalloc
    Wed Apr 3 11:11:07.013 [initandlisten] options: { dbpath: "/root/db", maxConns: 2000 }
    Wed Apr 3 11:11:07.031 [initandlisten] journal dir=/root/db/journal
    Wed Apr 3 11:11:07.031 [initandlisten] recover : no journal files present, no recovery needed
    Wed Apr 3 11:11:07.170 [initandlisten] waiting for connections on port 27017
    Wed Apr 3 11:11:07.171 [websvr] admin web console waiting for connections on port 28017
    Wed Apr 3 11:11:10.076 [initandlisten] connection accepted from 192.168.4.86:53161 #1 (1 connection now open)
    再查看最大連接數(shù)，搞定

    [root@DELL113 mongodb-linux-i686-2.4.1]# ./bin/mongo 192.168.6.42
    MongoDB shell version: 2.4.1
    connecting to: 192.168.6.42/test
    > db.serverStatus().connections
    { "current" : 1, "available" : 1999, "totalCreated" : NumberLong(1) }
    > 
    關(guān)于ulimit的更多知識(shí)大家可以去網(wǎng)上檢索檢索
    
		
    
			posted on 2014-06-10 21:50 paulwong 閱讀(543) 評(píng)論(0)  編輯  收藏  所屬分類: MONGODB 
		
    
	
    
	
	





    
	    
    




    








    

				

    



    







    
        
	



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