目前我的日志文件是32兆。我是否错过了在日志文件增长时拆分日志文件的选项？
您可以使用logrotate来完成此工作。
将其放入/etc/logrotate.d/mongod中（假设您使用Linux并安装了logrotate）：
/var/log/mongo/*.log {
daily
rotate 30
compress
dateext
missingok
notifempty
sharedscripts
copytruncate
postrotate
/bin/kill -SIGUSR1 `cat /var/lib/mongo/mongod.lock 2> /dev/null` 2> /dev/null || true
endscript
}
如果您认为32兆欧对于一个日志文件来说太大，您可能还需要查看它包含的内容。
如果日志看起来基本上是无害的（“打开连接”，”关闭连接“），那么您可能需要使用--quiet开关启动mongod。这将减少一些更详细的日志记录。
使用logrotate是一个不错的选择。同时，它将生成fmchan评论的2个日志文件，您必须遵循Brett的建议，“在您的postrotate脚本中添加一行，以删除所有mongod风格的旋转日志”。
此外，复制截断不是最好的选择。在复制和截断之间总是有一个窗口。一些原木可能会丢失。可以检查logrotate手册页或参阅此复制截断讨论。
只需再提供一个选项。您可以编写一个脚本，将旋转信号发送到mongod并删除旧的日志文件mongoxrate.sh是我写的一个简单的参考脚本。你可以写一个简单地cron作业或脚本，每隔30分钟周期性地调用它。
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