I/O: epoll on Linux, kqueue on macOS, poll fallback on
Claude Code / Gemini: /gsd:help，详情可参考viber
In Postgres, every indexed row contains a pointer to where the row lives in the table. If a Top K filter cannot be fully answered by the index, Postgres must follow that pointer and materialize the entire row from the underlying table storage. This operation is expensive and prone to cache misses when performed for millions of candidates.。手游对此有专业解读
When the system call finishes, the goroutine checks whether it still has its P. If it does — great, keep going. If sysmon took it, the goroutine tries to grab any idle P. And if there are no idle Ps at all, it puts itself on the global run queue and waits to be picked up. We’ll cover sysmon in more detail in a following article.，这一点在游戏中心中也有详细论述
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