小编dan*_*njp的帖子

我有几个微实例已经好几周了.两者都在运行WordPress博客.在过去的24小时里,其中一人停了下来.即使重启后我也无法进入.另一个例子工作正常.

ssh: connect to host ec2-xxx-xxx-xxx-xxx.ap-southeast-1.compute.amazonaws.com port 22: Operation timed out

在日志中没有任何明显的问题.最后几行是:

cloud-init:  runcmd[  OK  ]
Mounting other filesystems:  [  OK  ]
Retrigger failed udev events[  OK  ]
Generating SSH1 RSA host key: [  OK  ]
Starting sshd: [  OK  ]
Starting ntpd: [  OK  ]
Starting sendmail: [  OK  ]
Starting sm-client: [  OK  ]
Starting crond: [  OK  ]
[  OK  ]
Starting atd: [  OK  ]
Starting yum-updatesd: [  OK  ]
Running cloud-init user-scripts (none found)[  OK …

只是想知道使用是否有任何优势

private static const

代替

private const

私人常数？如果您只有一个类或多个实例,这会改变吗？我怀疑如果你有多个类的实例,使用中可能会有一些小的内存/性能优势static.