Documents of products collection are intentionally designed to be more complex and larger than accounts - I want to see what happens, what is the performance penalty mainly, once individual documents are stored on multiple database pages. In Postgres, page size is 8 KB by default - in practice, the goal is to have at least 4 rows stored on a single page, so every record that is larger than 2 KB is put on two or more disk pages. It obviously reduces performance for both writes & reads - more disk pages to read from and write to. In Mongo it works slightly differently in details, but essentially in the same vein - larger documents are stored on more than one page, degrading performance for all operations. In both cases we are about to see - how much exactly.
泽连斯基说,他已与美国总统特朗普谈过,说乌美需要和俄总统普京举行三方元首会晤。如果普京对此不予支持,则可能导致冲突“旷日持久”。随着美国中期选举临近,局势可能更加复杂,因为届时美方将集中精力于国内问题。如果普京愿意三方元首会晤,那么该会晤有机会在半年内举行,并且尝试结束冲突。
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Иран назвал путь к прекращению войны14:05
比较意外的是网易云音乐除了登录相关的功能之外,仍然可以正常播放歌曲和查看榜单,这款应用在 iOS 6 和 OS X Mavericks 上的老版本至今也能够正常运行。