*Redis latency-doctor 命令

*语法

LATENCY DOCTOR

LATENCY DOCTOR 命令报告不同的延迟相关问题并提供可能的补救建议。

此命令是延迟监控框架中最强大的分析工具，能够 提供额外的统计数据，如延迟峰值之间的平均周期、中位数偏差，以及事件的可读分析。对于某些事件，如 fork，还会提供额外信息，如系统分叉进程的速率。

这是你应该在 Redis 邮件列表中发布的输出，如果你正在寻找有关延迟相关问题的帮助。

*示例

127.0.0.1:6379> latency doctor

Dave, I have observed latency spikes in this Redis instance.
You don't mind talking about it, do you Dave?

1. command: 5 latency spikes (average 300ms, mean deviation 120ms,
    period 73.40 sec). Worst all time event 500ms.

I have a few advices for you:

- Your current Slow Log configuration only logs events that are
    slower than your configured latency monitor threshold. Please
    use 'CONFIG SET slowlog-log-slower-than 1000'.
- Check your Slow Log to understand what are the commands you are
    running which are too slow to execute. Please check
    http://redis.io/commands/slowlog for more information.
- Deleting, expiring or evicting (because of maxmemory policy)
    large objects is a blocking operation. If you have very large
    objects that are often deleted, expired, or evicted, try to
    fragment those objects into multiple smaller objects.

注意： 医生有不稳定的心理行为，因此我们建议谨慎地与其互动。

有关更多信息，请参阅 延迟监控框架页面。

*返回信息

RESP2：批量字符串回复: 人类可读的延迟分析报告。

RESP3：逐字字符串回复: 人类可读的延迟分析报告。