postgre 数据库推荐的设置方式, 一直在生产上这么设置没出啥问题 https://i.v2ex.co/504J5BO2.png

How to Find the Optimal Database Connection Pool Size
A formula which has held up pretty well across a lot of benchmarks for years is that for optimal throughput the number of active connections should be somewhere near ((core_count * 2) + effective_spindle_count). Core count should not include HT threads, even if hyperthreading is enabled. Effective spindle count is zero if the active data set is fully cached, and approaches the actual number of spindles as the cache hit rate falls. Benchmarks of WIP for version 9.2 suggest that this formula will need adjustment on that release. There hasn't been any analysis so far regarding how well the formula works with SSDs.

However you choose a starting point for a connection pool size, you should probably try incremental adjustments with your production system to find the actual "sweet spot" for your hardware and workload.

Remember that this "sweet spot" is for the number of connections that are actively doing work. Ignore mostly-idle connections used for system monitoring and control when working out an appropriate pool size. You should always make max_connections a bit bigger than the number of connections you enable in your connection pool. That way there are always a few slots available for direct connections for system maintenance and monitoring.

https://wiki.postgresql.org/wiki/Number_Of_Database_Connections

一顿规划猛如虎, 我们要高并发, 高可用, 微服务, 分布式, 百万在线.
上线一看, 在线设备总数 600 https://i.v2ex.co/504J5BO2.png

帮你测试了, 可以.

new TypeReference<Channel<Item>>() {}

阿里轻量云可以

做个废物, 过上混吃等死的幸福生活

@aptupdate #82 是的, 好多年了, 只穿这个 t. 我一直买的黑色网眼, 感觉不怎么透, 白色的可能会透吧

优衣库的 AIRism 网眼 T 恤.
太轻薄太舒服了, 再也穿不惯其他 T 恤.

比如, 无论在哪个 ide 中, 按 Caps + F 都是格式化代码

用 AutoHotKey 做的映射, 自定义了一套快捷键, 然后根据不同的 ide 脚本执行对应的 ide 中快捷键

1. 存路由 存按钮权限.按钮级别的目前没有找到称心的办法. 现在就是再前端埋点写死的按钮权限, 然后调用后端接口返回用户具体的权限列表;

2. 存 url. 做动态权限的话, security 动态加载权限时, 没有 url 怎么匹配具体哪个 url 有什么权限.

另外, security 的动态权限挺难搞, 我目前的方法还得用反射拿到 SecurityMetadataSource 中的 map 才能真正动态修改权限配置(改完不用重启应用的那种). 楼主用的什么方法实现的动态配置能否请教一下

为什么不来试试 Angular 呢, 不是 AngularJs! 是 Angular!

商人么, 肯定是要赚钱的.
但是, 对于不会装机的人来说, 买了不亏.
会装机的话, 按着他的单子自己装吧, 装机猿自己也说推荐买配件自己装.

@shaojz2005 #5 看代码, 搜索功能被注释了

@renxingdeni #55 不是很懂是为什么. 换了个也是山东联通的电脑也能复现, 用手机联通 4G 能复现, 移动 4G 打不开网站.

@renxingdeni #36 山东联通, 还是会被跳到 xx 直播, 本地 dns 用的 8888 和阿里都能复现. 祝你早日解决问题 https://i.v2ex.co/504J5BO2.png

@renxingdeni #10
https://sm.ms/image/164CctDqVZs9NvT
上边图穿错了, 重新发一下 NSFW