sleep

问题 I have a 500,000 line SQL script: update users set region_id = 9814746 where id = 101 and region_id is null; update users set region_id = 9814731 where id = 102 and region_id is null; update users set region_id = 3470676 where id = 103 and region_id is null; I want to INSERT a delay of 10 seconds every 50 lines. Does pgsql have a waitfor statement like t-sql . Thanks. 回答1: Does pgsql have a waitfor statement like t-sql. Yes, pg_sleep: pg=> SELECT pg_sleep(10); pg_sleep ---------- (1 row) 回答2:

问题 I have a 500,000 line SQL script: update users set region_id = 9814746 where id = 101 and region_id is null; update users set region_id = 9814731 where id = 102 and region_id is null; update users set region_id = 3470676 where id = 103 and region_id is null; I want to INSERT a delay of 10 seconds every 50 lines. Does pgsql have a waitfor statement like t-sql . Thanks. 回答1: Does pgsql have a waitfor statement like t-sql. Yes, pg_sleep: pg=> SELECT pg_sleep(10); pg_sleep ---------- (1 row) 回答2:

问题 I have a problem with the sleep function in Swift code. I'm using import Darwin and usleep(400000) . Some actions before reaching the sleep are blocked and I dont know why. Here a short example from my code: @IBAction func Antwort4Button(_ sender: Any) { if (richtigeAntwort == "4"){ Antwort4.backgroundColor = UIColor.green Ende.text = "Richtig!" NaechsteFrage() } else { Ende.text = "Falsch!" //NaechsteFrage() } } func NaechsteFrage() { usleep(400000) Antwort1.backgroundColor = UIColor.red

问题 I have a problem with the sleep function in Swift code. I'm using import Darwin and usleep(400000) . Some actions before reaching the sleep are blocked and I dont know why. Here a short example from my code: @IBAction func Antwort4Button(_ sender: Any) { if (richtigeAntwort == "4"){ Antwort4.backgroundColor = UIColor.green Ende.text = "Richtig!" NaechsteFrage() } else { Ende.text = "Falsch!" //NaechsteFrage() } } func NaechsteFrage() { usleep(400000) Antwort1.backgroundColor = UIColor.red

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I have difficulty in understanding power management best practices and sleep mode state of android device. Sleep mode. 1.1) when will this happen? 1.2) CPU is going to sleep and my threads are suspend? and when will this happen? 1.3) To prevent CPU sleeping I can use PARTIAL_WAKE wake lock or alarm manager? What

问题 I'm seeing a lot of usages of sleep 0 in my one of my client project. The code look something like this. while true ... ... sleep 0 end Reading through some of the answer of SO like this it seems that sleep 0 has some significance. What I want to known now is that does scheduling for other thread to run (if they are waiting to run) during the time slice 0 is a job of a lang VM like ruby or python or it is a job of kernel. In order word does Ruby VM would honor sleep 0 like it is mention in

问题 I want to tell my Python threads to yield, and so avoid hogging the CPU unnecessarily. In Java, you could do that using the Thread.yield() function. I don't think there is something similar in Python, so I have been using time.sleep(t) where t = 0.00001 . For t=0 there seems to be no effect. I think that maybe there is something I am not understanding correctly about Python's threading model, and hence the reason for the missing thread.yield() . Can someone clarify this to me? Thanks! PS:

问题 The Unix.sleep function can suspend the program for whole seconds, but how can you suspend it for less than a second? 回答1: The classical Unix solution for this is to use select() with no file descriptors: let minisleep (sec: float) = ignore (Unix.select [] [] [] sec) 回答2: The Thread.delay function pauses the thread for the given number of seconds, but it takes a float, allowing you to pause the thread for less than a second. 回答3: from Unix module val sleepf : float -> unit Stop execution for

问题 I'm building an IR to wifi bridge using an esp8266. Basically I'm building an IR receiver connected to an esp8266 inside an IR remote control, to forward received IR Remote keypresses over wifi to a server. I'm using a Wemos D1 Mini. I already have the IR decoding and network forwarding part working, but it is always on, which uses a lot of battery, especially considering that 99% of the time no buttons are being pressed. I want it to go into deep sleep when a button hasn't been pressed for a

问题 I'm building an IR to wifi bridge using an esp8266. Basically I'm building an IR receiver connected to an esp8266 inside an IR remote control, to forward received IR Remote keypresses over wifi to a server. I'm using a Wemos D1 Mini. I already have the IR decoding and network forwarding part working, but it is always on, which uses a lot of battery, especially considering that 99% of the time no buttons are being pressed. I want it to go into deep sleep when a button hasn't been pressed for a