我需要优化这个查询,'因为执行时间太长。我已经在geom(point)上构建了主要索引,但它们并没有被不幸地使用。 select *, cast(st_distance_sphere(city_gis.point, tmp1.pnt) as int) as distance
from tmp1
inner join city_gis
on cast(st_dista
有7个线程组在我们的测试计划: Thread group 1
Thread group 2
Thread group 3
Thread group 4
Thread group 5
Thread group 6
Thread group 7
当线程组1点结束,我需要线程组2点开始前添加延迟。我曾想过在每个线程组中添加启动延迟(秒),或者添加一个包含Thread.sleep(60)的
排序数据帧我有这样的数据帧: df
artist track pos neg neu
0 Sufjan Stevens Should Have Known Better 0.07 0.93 0.0
8 Radiohead Daydreaming 0.05 0.95 0.0
1 Sufjan Stevens To Be Alone With You