MongoDB停止未知原因

我在Ubuntu 14.04.4上安装了MongoDB服务器 有时它会在未知的原因下停止。你有什么想法吗

您可以看到启动mongod实例前后的最后日志

2016-10-12T08:47:32.223+0000 I NETWORK [HostnameCanonicalizationWorker] Starting hostname canonicalization worker
2016-10-12T08:47:32.222+0000 I FTDC [initandlisten] Initializing full-time diagnostic data capture with directory '/var/lib/mongodb/diagnostic.data'
2016-10-12T08:47:31.727+0000 I STORAGE [initandlisten] wiredtiger_open config: create,cache_size=1G,session_max=20000,eviction=(threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0),
2016-10-12T08:47:31.727+0000 W STORAGE [initandlisten] Recovering data from the last clean checkpoint.
2016-10-12T08:47:31.727+0000 W - [initandlisten] Detected unclean shutdown - /var/lib/mongodb/mongod.lock is not empty.
2016-10-12T08:47:31.727+0000 I - [initandlisten] Detected data files in /var/lib/mongodb created by the 'wiredTiger' storage engine, so setting the active storage engine to 'wiredTiger'.
2016-10-12T08:47:31.700+0000 I CONTROL [initandlisten] options: { config: "/etc/mongod.conf", net: { bindIp: "127.0.0.1,server_ip", port: 27017 }, storage: { dbPath: "/var/lib/mongodb", journal: { enabled: true } }, systemLog: { destination: "file", logAppend: true, path: "/var/log/mongodb/mongod.log" } }
2016-10-12T08:47:31.700+0000 I CONTROL [initandlisten] target_arch: x86_64
2016-10-12T08:47:31.700+0000 I CONTROL [initandlisten] distarch: x86_64
2016-10-12T08:47:31.700+0000 I CONTROL [initandlisten] distmod: ubuntu1404
2016-10-12T08:47:31.700+0000 I CONTROL [initandlisten] build environment:
2016-10-12T08:47:31.700+0000 I CONTROL [initandlisten] modules: none
2016-10-12T08:47:31.700+0000 I CONTROL [initandlisten] allocator: tcmalloc
2016-10-12T08:47:31.700+0000 I CONTROL [initandlisten] OpenSSL version: OpenSSL 1.0.1f 6 Jan 2014
2016-10-12T08:47:31.700+0000 I CONTROL [initandlisten] git version: 79d9b3ab5ce20f51c272b4411202710a082d0317
2016-10-12T08:47:31.700+0000 I CONTROL [initandlisten] db version v3.2.10
2016-10-12T08:47:31.700+0000 I CONTROL [initandlisten] MongoDB starting : pid=4487 port=27017 dbpath=/var/lib/mongodb 64-bit host=db-server
2016-10-11T06:54:31.233+0000 I ACCESS [conn1] Successfully authenticated as principal agent on admin
2016-10-11T06:54:29.641+0000 I ACCESS [conn6] Successfully authenticated as principal agent on admin

注意：除了绑定Ip之外，我没有对配置文件进行任何更改

更新

当我查看syslog文件时

Oct 11 02:54:38 db-server kernel: [] Out of memory: Kill process 26603 (mongod) score 687 or sacrifice child
Oct 11 02:54:38 db-server kernel: [] init: mongod main process (26603) killed by KILL signal

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看起来您的mongo进程已被Linux内存不足杀手杀死。这通常发生在您的计算机内存不足，需要终止某些操作以防止操作系统崩溃时

你可以给它一些关于做什么的指导。您可以阅读本文以获得一些建议：

或者，您可以尝试在更少的内存中运行Mongo，但Mongo可能难以配置以限制内存使用。这里有一些指导：

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可能是您的内存不足，无法运行mongo—您的Ubuntu服务器上有多少内存？

mongo日志中似乎没有任何错误—您可以查看操作系统日志（/var/log/messages、/var/log/syslog、journalctl mongo，具体取决于您的版本）并粘贴任何可能相关的内容？@MattInnes我更新了问题。它看起来像是内存问题。如何设置mongodb的最大内存使用率？谢谢您的回答。我试试看。我有1GB的内存，我现在用来测试，当我打算增加到4GB的时候。我希望这足够让WiredTiger（您根据日志使用的）使用至少1Gb的缓存（），因此您可能无法运行它。。。。如果服务器上没有运行太多其他内容，2Gb应该可以