July 2019
Intermediate to advanced
480 pages
9h 35m
Chinese
Content preview from 持續交付｜使用Java
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
觀察機制：監視、log 與追蹤 |
397
小心溫水煮青蛙：Abraham 的經驗
有一個古老的寓言說，如果你把青蛙放入一壺開水，牠會立刻跳出來，但是如
果你把牠放入溫水，再逐漸將水煮沸，青蛙就無法發現溫度變高了，所以會被
活活煮熟。雖然這個故事的真實性值得懷疑（我當然不鼓勵你親自測試），但
是它提供了一些可以運用的知識。
許多數據或視覺化工具都有一種限制因素—它們需要的資源數量，因為儲存資
料的成本高昂，為它製作索引，以便更快速地進行視覺化更是如此。因此，我
經常看到一些團隊在他們的視覺化工具中設置時間限制，通常是兩週，有時甚
至更短。
大多數人都不介意這一點，所以將圖表設置成一個相當短的期限，通常介於 30
分鐘之前到一天之前之間，我很少遇到喜歡檢查一天之前發生了什麼事情的團
隊。但是，我喜歡做進一步的調查，因為我想要了解長期的模式，例如工作日
的流量比週末高多少？與一年之內的其他月分相比，夏季增加多少新用戶？訪
客數量在假期驟降是正常的現象，還是今年的景氣不太好？這類的問題困擾著
我，它們也是大多數監視工具無法回答的。
誠然，有許多問題經常是突然出現的，那些問題都可以用短期監測的觀點加以
注意。對於較長期的問題，我傾向以一種相當簡單的方式來維護自己的數據清
單（通常是存有每日總數的試算表），並從中觀察模式。這聽起來可能有點多
餘，尤其是當你已經花了那麼多精力建立一個適當的 ELK 堆疊或類似的東西
時，但對我來說，這是可帶來回報的：有一次，我發現了一隻正在被慢慢煮熟
的青蛙，它是一個性能問題，在兩個月的時間裡，那個問題一直逐漸上升 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.