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Posted to notifications@skywalking.apache.org by GitBox <gi...@apache.org> on 2021/03/12 01:41:40 UTC
[GitHub] [skywalking] ppliuppliu opened a new issue #6541: A little confused about the alarm rules
ppliuppliu opened a new issue #6541:
URL: https://github.com/apache/skywalking/issues/6541
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- [ ] Requirement
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### Question
- What do you want to know?
I am a little confused about the conception of the alarm rule, even after I read the document many times.
- How often will the data be evaluated? If I set the _Period_ to be 10, will it evaluate the data of the past 10 minutes every 1 minute? Or I can set the interval in somewhere?
- What _Count_ exactly means? If I set the _Count_ to be 2, and the _Period_ to be 10, does it means the metric reach the alarm condition for 20 minutes? Or twice of the evaluated interval?
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[GitHub] [skywalking] ppliuppliu removed a comment on issue #6541: A little confused about the alarm rules
Posted by GitBox <gi...@apache.org>.
ppliuppliu removed a comment on issue #6541:
URL: https://github.com/apache/skywalking/issues/6541#issuecomment-797316658
查了下代码，每10s检测一下告警，但我更没有办法理解这里count的含义了。
以默认告警配置为例：
` service_resp_time_rule:
metrics-name: service_resp_time
op: ">"
threshold: 1000
period: 10
count: 3
silence-period: 5
message: Response time of service {name} is more than 1000ms in 3 minutes of last 10 minutes.`
这里的count:3 为什么是指 响应时间在最近10分钟内有3分钟超过了1000ms，服务的吞吐比较高的话，每秒都有几十次请求，每个请求都有响应时间，这个3是如何对应到3分钟的呢？如果是指检测间隔的话，应该是30s才对吧
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[GitHub] [skywalking] wu-sheng commented on issue #6541: A little confused about the alarm rules
Posted by GitBox <gi...@apache.org>.
wu-sheng commented on issue #6541:
URL: https://github.com/apache/skywalking/issues/6541#issuecomment-797504838
In the storage, all metrics have been downsampling into minutes. Such as CPM in 21:54 is one slot, the next is 21:55. What is your traffic load, doesn't matter.
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[GitHub] [skywalking] wu-sheng closed issue #6541: A little confused about the alarm rules
Posted by GitBox <gi...@apache.org>.
wu-sheng closed issue #6541:
URL: https://github.com/apache/skywalking/issues/6541
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[GitHub] [skywalking] ppliuppliu commented on issue #6541: A little confused about the alarm rules
Posted by GitBox <gi...@apache.org>.
ppliuppliu commented on issue #6541:
URL: https://github.com/apache/skywalking/issues/6541#issuecomment-797326845
How to understand _how many slots_? Take response time as an example. When the application throughput is relatively high, there are hundreds of requests per second, and each request has a response time. Does each request count as a count?
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[GitHub] [skywalking] wu-sheng commented on issue #6541: A little confused about the alarm rules
Posted by GitBox <gi...@apache.org>.
wu-sheng commented on issue #6541:
URL: https://github.com/apache/skywalking/issues/6541#issuecomment-797313985
Think in this way, period is windows of metric slot. Count means how many slots over the threshold in the given window.
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[GitHub] [skywalking] ppliuppliu commented on issue #6541: A little confused about the alarm rules
Posted by GitBox <gi...@apache.org>.
ppliuppliu commented on issue #6541:
URL: https://github.com/apache/skywalking/issues/6541#issuecomment-797316658
查了下代码，每10s检测一下告警，但我更没有办法理解这里count的含义了。
以默认告警配置为例：
` service_resp_time_rule:
metrics-name: service_resp_time
op: ">"
threshold: 1000
period: 10
count: 3
silence-period: 5
message: Response time of service {name} is more than 1000ms in 3 minutes of last 10 minutes.`
这里的count:3 为什么是指 响应时间在最近10分钟内有3分钟超过了1000ms，服务的吞吐比较高的话，每秒都有几十次请求，每个请求都有响应时间，这个3是如何对应到3分钟的呢？如果是指检测间隔的话，应该是30s才对吧
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