StackOverflow2013

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PO
primarykey
Id
19826733
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2013-11-07T02:11:55.920
FavoriteCount
0
LastActivityDate
2013-11-08T01:08:08.857
LastEditDate
2013-11-08T01:08:08.857
LastEditorUserId
1769295
OwnerUserId
1769295
ParentId
19772530
PostTypeId
2
Score
19
ViewCount
0
LastEditorDisplayName
text
Body
It's just cleaner and a good practice when dealing with a lot of stuff. I ran into this a few weeks ago I was using gevent spawn to verify a bunch of emails against DNS on the order of 30k :). <pre><code>from gevent.pool import Pool import logging rows = [ ... a large list of stuff ...] CONCURRENCY = 200 # run 200 greenlets at once or whatever you want pool = Pool(CONCURRENCY) count = 0 def do_work_function(param1,param2): print param1 + param2 for row in rows: count += 1 # for logging purposes to track progress logging.info(count) pool.spawn(do_work_function,param1,param2) # blocks here when pool size == CONCURRENCY pool.join() #blocks here until the last 200 are complete </code></pre> I found in my testing that when CONCURRENCY was around 200 is when my machine load would hover around 1 on a EC2 m1.small. I did it a little naively though, if I were to do it again I'd run multiple pools and sleep some time in between them to try to distribute the load on the NIC and CPU more evenly. One last thing to keep in mind is keeping an eye on your open files and increasing that if need be: <a href="http://www.cyberciti.biz/faq/linux-increase-the-maximum-number-of-open-files">http://www.cyberciti.biz/faq/linux-increase-the-maximum-number-of-open-files</a>. The greenlets I was running were taking up around 5 file descriptors per greenlet so you can run out pretty quickly if you aren't careful. This may not be helpful if your system load is above one as you'll start seeing diminishing returns regardless.
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1. This table or related slice is empty.
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1. POgevent: downside to spawning large number of greenlets?
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PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USJordan Shaw
UserOwnerUserId
1. USJordan Shaw
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1. POgevent: downside to spawning large number of greenlets?
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1. VO
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