Scrapy 's Scrapyd too slow with scheduling spiders

问题

I am running Scrapyd and encounter a weird issue when launching 4 spiders at the same time.

2012-02-06 15:27:17+0100 [HTTPChannel,0,127.0.0.1] 127.0.0.1 - - [06/Feb/2012:14:27:16 +0000] "POST /schedule.json HTTP/1.1" 200 62 "-" "python-requests/0.10.1"
2012-02-06 15:27:17+0100 [HTTPChannel,1,127.0.0.1] 127.0.0.1 - - [06/Feb/2012:14:27:16 +0000] "POST /schedule.json HTTP/1.1" 200 62 "-" "python-requests/0.10.1"
2012-02-06 15:27:17+0100 [HTTPChannel,2,127.0.0.1] 127.0.0.1 - - [06/Feb/2012:14:27:16 +0000] "POST /schedule.json HTTP/1.1" 200 62 "-" "python-requests/0.10.1"
2012-02-06 15:27:17+0100 [HTTPChannel,3,127.0.0.1] 127.0.0.1 - - [06/Feb/2012:14:27:16 +0000] "POST /schedule.json HTTP/1.1" 200 62 "-" "python-requests/0.10.1"
2012-02-06 15:27:18+0100 [Launcher] Process started: project='thz' spider='spider_1' job='abb6b62650ce11e19123c8bcc8cc6233' pid=2545 
2012-02-06 15:27:19+0100 [Launcher] Process finished: project='thz' spider='spider_1' job='abb6b62650ce11e19123c8bcc8cc6233' pid=2545 
2012-02-06 15:27:23+0100 [Launcher] Process started: project='thz' spider='spider_2' job='abb72f8e50ce11e19123c8bcc8cc6233' pid=2546 
2012-02-06 15:27:24+0100 [Launcher] Process finished: project='thz' spider='spider_2' job='abb72f8e50ce11e19123c8bcc8cc6233' pid=2546 
2012-02-06 15:27:28+0100 [Launcher] Process started: project='thz' spider='spider_3' job='abb76f6250ce11e19123c8bcc8cc6233' pid=2547 
2012-02-06 15:27:29+0100 [Launcher] Process finished: project='thz' spider='spider_3' job='abb76f6250ce11e19123c8bcc8cc6233' pid=2547 
2012-02-06 15:27:33+0100 [Launcher] Process started: project='thz' spider='spider_4' job='abb7bb8e50ce11e19123c8bcc8cc6233' pid=2549 
2012-02-06 15:27:35+0100 [Launcher] Process finished: project='thz' spider='spider_4' job='abb7bb8e50ce11e19123c8bcc8cc6233' pid=2549 

I already have these settings for Scrapyd:

[scrapyd]
max_proc = 10

Why isn't Scrapyd running the spiders at the same time, as quick as they are scheduled?

回答1:

I've solved it by editing scrapyd/app.py on line 30.

Changed timer = TimerService(5, poller.poll) to timer = TimerService(0.1, poller.poll)

EDIT: The comment below by AliBZ regarding the configuration settings is a better way to change the polling frequency.

回答2:

From my experience with scrapyd, it doesn't run a spider immediately as you schedule one. It usually waits a little bit, until the current spider is up and running, then it starts the next spider process (scrapy crawl).

So, scrapyd launches processes one by one until max_proc count is reached.

From your log i see that each of your spiders is running about 1 second. I think, you will see all your spiders running if they will run at least 30 seconds.

来源：https://stackoverflow.com/questions/9161724/scrapy-s-scrapyd-too-slow-with-scheduling-spiders