GoLang 中的高并发内存计数器

Ah, the familiar beep beep beep but don’t worry, it’s not your alarm coaxing you out of bed. No, this is far worse: the dreaded PagerDuty on-call alert! What’s the crisis this time? There appears to be an issue with high database CPU utilisation, overwhelmed by a flood of heavy traffic. If you’re a developer, chances are you’ve faced this scenario at least once. The very moment when you question every life decision while desperately searching for answers at 3 AM.

啊，那熟悉的哔哔哔，别担心，这不是闹钟在催你起床。不，这比那糟糕得多：令人闻风丧胆的 PagerDuty 值班警报！这次又是什么危机？似乎是数据库 CPU 利用率过高，被汹涌的流量压垮。如果你是一名开发者，很可能至少经历过一次这种场景。那一刻，你会在凌晨 3 点拼命寻找答案的同时，质疑人生中的每一个决定。

This article was born of one such heart-pounding, adrenaline-fuelled incident. Picture this: the database was struggling, the traffic was relentless, and the team was caught in the crossfire. The seemingly obvious solution was to migrate from SQL to NoSQL—a straightforward fix, or so it seemed. Instead of taking the easy way out, we stepped back, rolled up our sleeves, and tackled the problem head-on, embarking on a bold journey of optimisation.

这篇文章诞生于一次令人心跳加速、肾上腺素飙升的事件。想象一下：数据库不堪重负，流量汹涌而至，团队陷入交火之中。看似显而易见的解决方案是将 SQL 迁移到 NoSQL——一个看似简单的修复。然而，我们没有选择捷径，而是退后一步，卷起袖子，直面问题，踏上了一段大胆的优化之旅。

What followed was a rollercoaster of trial, error, and a few “why did we even try this” moments. Yet, isn’t that the beauty of being a developer? Embracing the chaos, thriving in the madness, and eventually emerging victorious with a story worth sharing.

接下来是一段充满试错、甚至几度“我们为什么要试这个”的过山车之旅。然而，这不正是开发者的魅力所在吗？拥抱混乱，在疯狂中茁壮成长，最终带着值得分享的故事凯旋而归。

Real-time usage count tracking is a common use case that can be found across many applications, like Instagram’s post like count, YouTube’s watch count, or a marketing campaign usage count, which is used in monitoring and measuring the performance of marketing campaigns to assess effectiveness. These counts don’t have to be highly accurate, but rather an approximation in most use cases. This meant that in an occurrence of an event, instead of immediately updating the count in the database, the coun...