Nginx flv stream gets too slow on 2000 concurrent connections

[Lukas Tribus]

Can you send us a 20+ lines of output from "vmstat 1" under this load? Also, what exact linux kernel are you running ("cat /proc/version")?


________________________________
> Date: Wed, 23 Jan 2013 21:51:43 +0500 
> Subject: Re: Nginx flv stream gets too slow on 2000 concurrent connections 
> From: shahzaib.cb at gmail.com 
> To: nginx at nginx.org 
>  
> Following is the output of 3000+ concurrent connections on iostat 1  
> command :- 
>  
> avg-cpu:  %user   %nice %system %iowait  %steal   %idle 
>             1.72    2.96    0.47    0.12    0.00   94.73 
>  
> Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn 
> sda              22.47      1988.92       733.04  518332350  191037238 
>  
> avg-cpu:  %user   %nice %system %iowait  %steal   %idle 
>             0.39    0.00    0.91    0.20    0.00   98.50 
>  
> Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn 
> sda              22.00      2272.00         0.00       2272          0 
>  
> avg-cpu:  %user   %nice %system %iowait  %steal   %idle 
>             0.46    0.00    0.91    0.07    0.00   98.57 
>  
> Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn 
> sda              23.00       864.00        48.00        864         48 
>  
> avg-cpu:  %user   %nice %system %iowait  %steal   %idle 
>             0.39    0.00    0.72    0.33    0.00   98.56 
>  
> Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn 
> sda              60.00      3368.00       104.00       3368        104 
>  
> avg-cpu:  %user   %nice %system %iowait  %steal   %idle 
>             0.20    0.00    0.65    0.20    0.00   98.95 
>  
>  
>  
> On Wed, Jan 23, 2013 at 8:30 PM, shahzaib shahzaib  
> <shahzaib.cb at gmail.com<mailto:shahzaib.cb at gmail.com>> wrote: 
> Sketchboy, i sent you the output of only 1000 concurrent connections  
> because it wasn't peak hours of traffic. I'll send you the output of  
> iostat 1 when concurrent  connections will hit to 2000+ in next hour.  
> Please keep in touch cause i need to resolve this issue :( 
>  
>  
> On Wed, Jan 23, 2013 at 8:21 PM, skechboy  
> <nginx-forum at nginx.us<mailto:nginx-forum at nginx.us>> wrote: 
> From your output I can see that it isn't IO issue, I wish I could help you 
> more. 
>  
> Posted at Nginx Forum:  
> http://forum.nginx.org/read.php?2,235447,235476#msg-235476<http://forum.nginx.org/read.php?2%2c235447%2c235476#msg-235476> 
>  
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