Keep Moving | 不如就勇敢打破，生命中的裂缝，阳光就逐渐洒满了其中
errgroup - 捕获 goroutine 的错误 2021-05-07 Photo by Daniel Romero on Unsplash 在Go里面，想要让程序并发运行是一件很简单的事情，只要在func执行的时候，加上go关键字便实现了。 但同时又引入了另外一个问题，go执行我们捕获不到错误信息。 对于普通错误信息，我们可能只需要将其打到 log 日志，然后到日志收集系统去查询。 阅读全文 Mongodb - Go driver 连接池空闲设置 2021-05-01 Photo by Hatfields London on Unsplash 最近线上的mongo出现了连接数报警，登上去查看后，发现连接数上去之后一直没有降下来，而很多会话都处于「不活跃」状态。 最开始是想是不是因为程序已经重启了，产生了新连接，而mongo服务端一直保持着旧连接没有释放。但通过对比连接数上涨的时间，已经过去蛮久了，作为TCP连接，假设一方连接已经中断，mongo服务端这时候理应也要释放了。 阅读全文 Mongodb - ObjectID顺序问题 2021-04-28 Photo by Julian Steenbergen on Unsplash 在mongodb中，当业务希望按时间排序获取数据时，我们可能会直接采用 _id 来 sort ，因为我们知道默认 _id 的类型是ObjectID，它包含了时间戳信息，而且是有索引的。...
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